U.S. patent number 3,677,212 [Application Number 05/037,970] was granted by the patent office on 1972-07-18 for submersible watercraft.
This patent grant is currently assigned to Gregoire Engineering & Development Co.. Invention is credited to Resta S. Gregoire.
United States Patent |
3,677,212 |
Gregoire |
July 18, 1972 |
SUBMERSIBLE WATERCRAFT
Abstract
The present invention comprises a streamlined hull of a
catamaran type having a tear drop sectioned pontoon portion along
each side with a horizontal substantially rectangular shaped body
portion fixed between the pontoon portions, and a pair of power
pods with a tear drop vertical cross section taken axially of the
craft, an impeller on a shaft extending from a motor in each pod
through the pointed edge at the outer end of each pod, and each
pair of pods being rotatably mounted for independent angular
adjustment about a horizontal axis at each end of the craft, said
horizontal axis extending substantially through the radial center
of the round end of the tear drop section of the pods. The impeller
drive motors are independently controlled for operation in either
direction so that unique maneuverability is obtainable either on or
under the surface of the water by proper coordination of the speed
and direction controls for the operation of the four power pods, or
even if only one pair of pods are operated to provide rolling,
looping speed and direction controls. The power pod and cargo and
operating equipment spaces are not closed for pressurization so
that the outside walls of the hull body may be comparatively light
even for operation at great depths since the same pressures are
effective on both sides of these walls no matter how deep the
operation. The spherical or tubular personnel housing portions of
the hull, occupying only a small portion of the entire hull space,
will be comparatively light in structure because of the smaller
dimensional requirements.
Inventors: |
Gregoire; Resta S. (Newport,
PA) |
Assignee: |
Gregoire Engineering &
Development Co. (Adelphi, MD)
|
Family
ID: |
21897356 |
Appl.
No.: |
05/037,970 |
Filed: |
May 18, 1970 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
756696 |
Jun 11, 1968 |
3512494 |
May 19, 1970 |
|
|
Current U.S.
Class: |
114/316; 114/330;
114/321; 114/338 |
Current CPC
Class: |
B63G
8/28 (20130101); B63B 1/14 (20130101); B63G
8/00 (20130101) |
Current International
Class: |
B63G
8/00 (20060101); B63B 1/00 (20060101); B63B
1/12 (20060101); B63b 001/10 () |
Field of
Search: |
;114/61,16
;89/1.5H,1.815 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Farrell; Andrew H.
Parent Case Text
This is a continuation of application Ser. No. 756,696, filed June
11, 1968 issued on May 19, 1970 as U.S. Pat. No. 3,512,494.
Claims
What is claimed is:
1. A submersible watercraft for deep sea navigation comprising
a pair of spaced pontoons having a substantially tear-drop
cross-section, with equalized water pressure inside and out,
a central wet cargo hull section connecting said pontoons,
power pods hinged at the ends of said hull section on horizontal
pivots for independent adjustment of the angle of thrust exerted by
each power pod,
said watercraft having a thin wet-shell covered streamlined
structure, including nose portions on the pontoons,
said power pods being pointed outwardly to provide stream-lined
shapes at the ends of said hull section, and
pressurized personnel compartments in the lower portions of said
pontoons, with observation windows in said nose portions.
2. A submersible watercraft as defined in claim 1, and streamlined
nose headlights mounted on said nose portions.
3. A submersible watercraft as defined in claim 1,
said pressurized compartments being round in section and having
thick shells to withstand the high pressures encountered in deep
sea operation.
4. A submersible watercraft as defined in claim 1,
said pressurized compartments being spherical.
5. A submersible watercraft as defined in claim 1,
said central cargo hull section being substantially rectangular and
having a lower deck at its bottom,
a rectangular cargo box provided with hoisting eyes and fitted
closely within said hull to provide an upper deck at its top,
and
means for locking said cargo box in said hull.
6. A submersible watercraft as defined in claim 1,
said central cargo hull section having upper and lower decks at its
top and bottom respectively, and
hinged hatches in said decks having power means for independently
opening or closing each hatch from the inside of said hull
section,
7. A submersible watercraft for deep sea navigation, comprising
a pair of spaced pontoons having a substantially tear-drop
cross-section, with equalized water pressure inside and out,
a central wet cargo hull section connecting said pontoons,
power pods hinged at the ends of said hull section on horizontal
pivots for independent adjustment of the angle of thrust exerted by
each power pod,
said water craft having a thin wet-shell covered streamlined
structure, including nose portions on the pontoons,
said power pods being pointed outwardly to provide streamlined
shapes at the ends of said hull section, and
pressurized personnel compartments in the lower portions of said
pontoons, with observation windows in said nose portions,
said pressurized compartments being spherical, there being a
plurality of spherical compartments in one pontoon, linked together
by involute neck portions providing passages for the movement of
personnel, equipment and material therebetween.
8. A submersible watercraft as defined in claim 6, and
a plurality of detachable torpedo tubes mounted on the inside of
said hatches for firing torpedoes therefrom when the hatches are
open.
9. A submersible watercraft comprising
a light streamlined open hull strong enough to withstand only
navigational water flow stresses,
at least one water sealed compartment within said hull having thick
walls of sufficient strength to withstand stresses of pressurized
operation at great depths, and
at least one involute passageway between two of said water sealed
compartments for the movement of personnel, equipment or materials
therebetween.
Description
This invention relates to water borne vessels, and more
particularly to a combined surface and underwater craft having a
new and novel hull concept.
In present day ship and submarine construction, the function and
adaptability of a vessel is strongly limited by certain fixed
concepts in hull design. In the case of boats and ships, a single
hull design has been used almost exclusively. In handling hull
design, the marine architects have been faced with severe maximum
limitations in stability, maneuverability, seaworthiness, and speed
per unit of horsepower. In some naval vessels, for example, as in
destroyers, it has been necessary to sacrifice stability in order
to obtain high speed without excessive horsepower. In battle
maneuvering, in a tight turn at high speed, the ship hull will skid
through the water a substantial distance. The resultant path,
therefore, is a rather wide arc, and in ship or boat handling great
care and skill is required to make allowance for this side slip.
There is also a problem of heavy list in tight turns.
In the case of a small craft, the application of very high
horsepower to a boat of relatively small size has created difficult
problems, including those of stability during straight forward
motion, skid or overturn on tight turns, and swamping of the boat
by the shipping of water.
In the case of submersible craft, design has heretofore been
limited to a single hull. The function of the craft has been
severely limited and has been restricted largely to naval warfare
and scientific explorations and research. They have been of little
value as cargo carriers because of problems of cargo loading and
unloading and also of stability. Submarines have limited value in
underwater operations since access and egress while the craft is
under water has been limited to small ports or air locks and
involves only the passage of divers and weapons, such as torpedoes
or rockets.
Designers of modern high speed submarines have in particular faced
problems in propulsion and maneuverability.
Depth control can no longer be achieved by the intake or ejection
of water ballast. Speed is so great that the depth and direction
are controlled by rudders and elevators, in a manner similar to
aircraft control. Avoidance of underwater obstructions is a
substantial problem. Intelligence on these obstructions may be
obtained only from instruments, and the craft must be capable of a
rapid maneuver to effect a change of course so as to evade the
obstruction. Again, side-slip, directional inertia and the like
require the exercise of great skill and care in the handling of a
submarine while it is travelling submerged. In this case, limited
maneuverability is only achieved when there is sufficient forward
speed so that control elements will respond. Present rudders and
elevators are not fully effective at high speeds, because the
momentum of the craft in relation to the control surface area is of
such magnitude that there is a dangerous lag between the
manipulation of the control elements and the resultant response of
the craft. This has been one of the serious design problems in the
advanced nuclear submarines.
It is an object of the present invention to create a new ship or
boat hull design which is easily adapted to a great diversity of
use while using only a single hull design with carefully calculated
performance characteristics.
Still another object of the invention is to provide a new and novel
water craft which is equally usable as a surface craft alone, as a
submersible craft, or as a combined surface and submersible
craft.
A further object of the invention is to provide a craft which is
adaptable for propulsion by the air blister principle, which may be
with the application of suitable air lift equipment, used as an air
borne vehicle, or which may be constructed as a combination water
craft and air vehicle.
Another object of the invention is to provide a basic water craft
design which is adaptable for either large ships or small boats, or
any desired intermediate type.
Still another object of the invention is to provide a basic water
craft design which is capable of exceptional maneuverability while
at the same time it is possessed of exceptional stability.
A further object of the invention is to provide a water craft which
on the water surface is capable of turning within the length of the
vessel to completely reverse its direction of travel, or capable of
executing perfect ninety degree angle turns while the vessel is
under power up to the maximum recommended horsepower, the list
during these maneuvers not being over ten degrees.
Another object of the invention is to provide a vessel which under
water is capable of executing perfect 90.degree. angle turns or
making a complete turn within its own length to reverse its
direction of travel, the hull listing not being over 10.degree.
.
Still another object of the invention is to provide a water craft
design of submersible type which is capable of surfacing from under
the water or submerging from the top of the water on the true
vertical line while the deck of the vessel remains on a true
horizontal plane.
A further object of the invention is to provide a submersible
vessel which is capable while submerged of turning in a complete
inside or outside loop-the-loop within a circle, the diameter of
which is equal to overall length of the hull.
Still another object of the invention is to provide a vessel which
is capable of doing a complete starboard or port-side roll-over for
a full 360.degree. within a circle whose diameter is equal to the
total width of the hull, this roll-over motion being obtainable
while the vessel is in a forward or reverse movement, horizontal
movement, vertical movement, or at any longitudinal degree of
movement therebetween, or while there is no forward or reverse
movement, vertical movement, horizontal movement, or any
longitudinal degree therebetween.
A further object of the invention is to provide a novel water craft
which is capable of braking while submerged or on the surface to a
relatively fast stop, thus avoiding appreciable continued momentum
after the power in the vessel has been cut off.
A further object of the invention is to provide a novel water craft
design which is capable of hovering on the surface or under the
water, regardless of currents, tides or waves which may be exerting
substantial forces on the vessel.
Yet another object of the invention is to provide a vessel wherein
the surfacing motion or the submerging motion can be converted in
the craft after the hull has been rolled over to any degree of the
360.degree. turn, so that the vessel will turn off at a full
90.degree. from any position in which the deck rests; and wherein
the vessel is capable of doing the inside or outside loop-the-loop
from any degree within the 360.degree. roll-over, so that every
motion, namely surfacing, submerging, loop-the-loop, inside or
outside loop, or roll-over to the port or starboard, can be varied
in any combination of motions to permit all motions to any degree
within a circle, the diameter of which is equivalent to the overall
length of the hull.
A further object of the invention is to provide a basic water craft
design wherein a versatile, functional structure is supported and
confined between two pontoons which are preferably of a tear drop
shape, as shown in the present drawings, but which, if desired,
could be modified to other cross-sectional shapes, these pontoons
serving as the buoyant portion of the structure, the air space of
the pontoon being totally separate and independent from the air
space in the central structure.
Still another object of the invention is to provide a vessel
wherein the central hull structure between the pontoons can be
filled with water or emptied of water, as desired, while surfaced
or submerged, without affecting the basic buoyancy or operativeness
of the vessel; and wherein the central hull structure can be opened
from the bottom or can be opened from the top while submerged or
afloat, or wherein the said central hull can be closed and sealed
and the water pumped therefrom to maintain a pressurized water-free
area.
Still another object is to provide a water craft structure wherein
it is possible to surface the craft in any position, whether it be
upside down, right side up, or on its side, thus permitting the
selective surfacing of the exterior of the hull, for repairs or
maintenance, including painting, without removing the vessel from
the water, or without using drydock facilities.
Yet another object of the invention is to provide a water craft
which is powered by power pods, there being two forward and two aft
pods, the said pods being self-contained for propulsion and control
and each having a self-contained power plant, this making it
possible in the event of individual power plant failure to lift off
or drop the defective pod, a new pod being installed while the
vessel is still in the water and without dock or drydock
facilities.
Another object of the invention is to provide a basic water craft
design which has wide commercial and military application, being
adaptable to passenger transport, cargo transport, surface and
underwater fishing, underwater mining for lake and ocean floor
mineral deposits, repair and servicing of submarine cables,
planting and servicing of underwater mines, planting and servicing
of underwater defense installations, missile launching, submarine
chasing, underwater demolition, and the like.
With the above and other objects in view, as will be presently
apparent, the invention consists in general of certain novel
details of construction and combinations of parts hereinafter fully
described, illustrated in the accompanying drawings, and
particularly claimed.
In the drawings, like characters of reference indicate like parts
in the several views, and
FIG. 1 is a perspective view of one form of the invention wherein
the central hull comprises a closed chamber, and disclosing the
basic relationship of spaced pontoons, and center hull structure,
and power pod propulsion;
FIG. 2 is a front elevational view of the water craft as shown in
FIG. 1;
FIG. 3 is a longitudinal section taken on the line 3--3 of FIG.
1;
FIG. 4 is a fragmentary view, partly broken away, of a part of the
power pod and hull structure, and showing one form of power control
for the angle of the power pods;
FIGS. 5 through 12 are schematic perspective views of the water
craft showing the angular positions of the power pods for various
selected maneuvers of the craft;
FIG. 13 is a fragmentary view of a modification of the water craft
wherein the central hull structure is provided with top and bottom
hatches which may be selectively opened or closed;
FIG. 14 is a cross-sectional view taken on the line 14--14 of FIG.
13;
FIG. 15 is a longitudinal sectional view showing a modification of
the water craft wherein the central hull portion is constructed to
receive a removable unit, which may be removed upwardly or
downwardly from its carrying position in the central hull
structure;
FIG. 16 is a fragmentary view showing one form of locking means for
fixing the removable unit of FIG. 15 in its place in the central
hull structure;
FIG. 17 is a top plan view of a modification of the basic design
which is particularly adapted for use as a demolition vessel or as
a submarine chaser;
FIG. 18 is a side elevational view of the modification shown in
FIG. 17;
FIG. 19 is a front elevational view, partly broken away, of the
demolition unit shown in FIGS. 17 and 18, the dotted lines
structure showing the manner of opening the top and bottom hatches
and the manner in which the nose portions of the pontoons may be
opened and hinged to the side to permit entrance or exit of a
person carried in the pontoon;
FIG. 20 is a rear elevational view of the modification shown in
FIGS. 17 and 18.
FIG. 21 is a further modification of the water craft of the present
invention, wherein the two forward power pods have been omitted,
leaving the aft power pods in assistance. This will retard the
maneuvering of the craft considerably, but for certain military
applications, this design might be applicable, particularly in view
of costs;
FIG. 22 is a longitudinal section taken on the line 22--22 of FIG.
21;
FIG. 23 is a front elevational view of the modification shown in
FIGS. 21 and 22;
FIG. 24 is a side elevational view, partly broken away, of a
further modification which is particularly adapted to be used as a
demolition unit, and which is designed for maximum depth of
submersion;
FIG. 25 is a front elevational view of the modification shown in
FIG. 24, showing the top and bottom hatches in open position, and
showing torpedo tubes which are detachably supported on the
hatches;
FIG. 26 is a fragmentary view, partly broken away, showing a
pressure capsule for the pontoon structure, which pressure capsule
is designed for maximum depth; and
FIG. 27 is a fragmentary view showing the spring-biased guardplates
which cover the openings between the central hull and the inner
ends of the power pods, and showing the manner in which the plates
pivot to permit the power pods to take their maximum angular
position.
It will be appreciated that in the drawings, for purposes of clear
and uncluttered disclosure of the essential and important
characteristics of the invention, many of the structural details
not essential to the inventive concepts involved have been
simplified or have not been shown. For example, much of the truss
and framing detail has been omitted. Power plants have been shown
in highly schematic form, and highly detailed standard structure
which would be housed in the pontoons to provide a normally
operative submersible craft has not been shown.
BASIC HULL DESIGN
The hull assembly in its basic form is shown in FIGS. 1, 2, 3, 4
and 27 of the drawings.
The craft comprises a pair of catamaran-type pontoons 30 and 31.
Except where the shape is broken for the insertion of other
structure, these pontoons are tear drop shaped in cross-section.
This cross-sectional shape is highly significant to the performance
of the craft.
Extending between the pontoons 30 and 31 is a central hull section
32 which is generally rectangular in shape. The central hull
section is rigidly connected to the pontoons and will possess the
necessary frame and truss structure to meet the stresses to which
the craft will be subjected, depending upon the size of the craft.
This may vary widely, and for simplification of disclosure these
details have not been shown. This central hull section is provided
with end walls 33 and 34, top deck 35 and bottom deck 36. This deck
area will be provided with the necessary seals to render it water
and air tight, and the necessary hinges, locking mechanisms and
devices for fastening and opening the said decks.
Control and propulsion of the craft is provide by four power pods
37, 38, 39 and 40. Each of these power pods is preferably tear drop
shaped in cross-section, as shown in FIG. 3. The axis of the tear
drop is preferably substantially in line with a longitudinal plane
through the midpoint of the midsection hull 32. The inner end of
each power pod is preferably an arc of a true circle so that the
pods may pivot in full range. The upper and lower faces of the pods
provide control surfaces which operate in a manner to be
described.
Each of the pontoons fore and aft is cut away as at 41, 42, 43 and
44 to provide for reception of the power pod structure, defining a
flat surface so that the said power pods may pivot through their
full range without interference from the hull, or the power pods
may have their exterior vertical faces curved to conform to the
curvature of the pontoons, as shown in the forward power pods 37
and 38 in FIG. 17.
The transition portions on the pontoon hull from the flat surfaces
41, 42, 43 and 44 to the full tear drop shape are rounded to reduce
water turbulence and resistance. These are shown at 45, 46 and 47.
Each of these surfaces may be provided with a port 48. The ports 48
may serve as torpedo tube openings, or may function as inlet or
outlet openings for water ballast.
It will be noted that the cross-sectional shape of the pontoons 30
and 31 includes an arcuate base curve 49 which is preferably a
segment of a true circle. Straight portions or side curves 50 are
tangent to the arc 49.
For improved operation and proper balance and stability, it has
been found that the craft is preferably designed so that its water
line, when the craft is surfaced, under normal operating load,
falls at the point of tangency of the straight portions 50 to the
arcuate base 49.
In its preferred form, it has been found that the tangent line 50
should intersect the arc at an angle of not less than 70 degrees or
more than 80 degrees from the horizontal. Further, the bottom deck
36 of the central hull section must be spaced upwardly from the
water line, or, to put it another way, spaced upwardly from the
point of tangency of the pontoon hull cross-section.
It should be noted at this point that the invention is not limited
to the precise hull shape shown. If, for reasons of pressure
resistance, it should be desired that the side portion 50 have some
curvature, then a theoretical mean taken through this curve of the
hull should conform to the relationship set forth above for the
straight portion 50. In this case, the bottom deck 36 would be
spaced above the intersection of the side wall curve and the
arcuate base curve. The basic relationship may exist, therefore,
even though variations may be made in the hull detail in designing
for various conditions. Expressed generally, planes taken through
the mean of the upper side curves of the tear drop shape would
intersect the plane taken through the intersection of the upper
side curves and the lower base curve at an angle of no less than
70.degree. or more than 80.degree.. It may be pointed out that in
the mathematical sciences, a straight line is considered a curve of
infinite radius.
The reason for these preferred relationships is that when the craft
is put hard about, the forces on the straight portions 50 will
force the craft down, increasing the displacement to the degree
that the bottom of the deck will come into substantial contact with
the normal surface of the water.
The distance of the bottom deck 36 from a line through the points
of tangency can be varied within certain limits, depending upon the
angle of the straight portions 50 to the horizontal. The distance
may be decreased as the angle of the straight portion 50
increases.
Each of the power pods 37, 38, 39 and 40 is pivotally attached to
the hull structure, the important aspect of the mounting being that
such pod be capable of pivoting a full 90 degrees in either
direction from the normal position of the pod in line with the hull
structure, each independent of the other. Various means may be used
for pivotally mounting and controlling the pods. One simplified,
somewhat schematic, but operational arrangement is shown in FIG.
4.
In FIG. 4 the shaft 51 extends from the pontoon 30 to the pontoon
31 through the pods 37 and 38, being mounted in suitable bearings.
The power pod 37 is rigidly attached to the shaft 51, and will turn
when the shaft is turned. A second shaft 52 is concentric to the
shaft 51 and is rotatable thereon. The power pod 38 is rigidly
secured to the shaft 52, so as to turn therewith. The shaft 51 is
provided with a drive gear 54, and the shaft 52 is provided with a
drive gear 53. Suitable power means, such as motors 55 and 56, is
provided to rotate the drive gears and separately and independently
adjust the angle of the pods. These motors may be tied in with a
suitable guidance and control system not forming a part of the
present invention. Other means may be provided to power and fix the
position of the pods.
Each of the power pods is provided with a suitable self-contained
power unit 57. These units 57 drive suitable propellers 58. For the
purpose of the present invention, it is necessary that the power
units supply maximum power in either forward or reverse direction.
The details of the power unit do not form a part of the present
invention. These units should be capable of supplying their own
combustion oxygen, and disposing of their products of combustion
under water. If desired, jet nozzles may be used in place of the
propellers, with a suitable arrangement to change the direction of
thrust of said nozzles on the forward pods.
While the opening between the end walls 33 and 34 and curved inner
ends of the power pods may be left open, if desired, as shown in
FIG. 3, the said openings are preferably covered by protective
guard plates 59, as shown in FIGS. 1 and 27. The plates 59 have
downwardly curved leading edges 60 and are supported on the central
hull section 12 by spring hinges 61. These spring hinges
continually bias the plates 59 into contact with the power pods.
These plates, however, as shown in FIG. 27, permit full range
angular positioning of the pods, since they pivot with the pods.
These plates 59 exclude solid matter from the openings between the
hull and the pods, and reduce turbulence.
The power pods 37, 38, 39 and 40 are designed for powering and
control of the craft while submerged. For low speed, surface
travel, suitable low-powered auxiliary drive may be provided. This
could be in the nature of a screw on a depending shaft from the
power pods or a battery powered drive screw on the pontoons. This
auxiliary drive means has not been shown.
PROPULSION AND MANEUVERABILITY OF THE CRAFT
FIGS. 5 through 12 of the drawings are schematic views showing the
various maneuvers of which the craft is capable. It should be
pointed out that the full range of these maneuvers is made possible
by the remarkable balance and stability of the full design due to
the characteristics and structure previously described.
In FIG. 5 there is shown the position of the power pods to obtain a
balanced forward motion while submerged, the aft propellers
functioning as pushing screws and the forward propellers
functioning as pulling screws. All four propellers 58 being of a
reversible nature, and the positioning of the power pods being
independent of each other, it is possible to yawl the craft through
the use of the propellers and power pods without the use of a
rudder underneath the structure.
FIG. 6 shows the power pods in raised position, as might be applied
to surfacing the craft. In this position, the propellers on power
pods 37, 38, 39 and 40 are turning in a direction to exert a
pulling thrust. Thus the craft would surface in the direction of
the arrow, with the deck remaining on a true horizontal plane. With
the craft submerged, if the propellers are rotating so as to exert
a forward thrust or push, the craft would submerge further in a
direction opposite to the arrow, with the deck on a horizontal
plane.
In FIG. 7, the forward power pods 37 and 38 are shown as raised in
a position so that the plane of the underface of each power pod is
at an angle of 90.degree. to the deck 35. The aft power pods 39 and
40 are down to a position where the bottom plane of each of these
power pods is at an angle of 90.degree. to the bottom deck 36. In
this position, the power pods offer a barrier to develop maximum
resistance to forward motion. Thus, with the power cut off prior to
or during the placement of the power pods in this position, the
forward momentum of the craft will be considerably reduced, braking
the craft to a faster stop than would be found in conventional
hulls.
In FIG. 8, with the forward power pod 37 in true center alignment
with the central hull section 32, with the power pod 38 raised,
with the power pod 39 in true center alignment with the central
hull section 32, with the power pod 40 lowered, and with all four
propellers operating so as to produce forward pull or thrust,
respectively, the craft will advance forward, at the same time
doing a complete roll-over of 360.degree. to the port side.
Reversing the propellers while this relationship exists will cause
the craft to back up and roll a full 360.degree. to the starboard
side.
In FIG. 9, power pod 37 is shown as raised, and pod 38 is in true
center alignment with the central hull section 32. Aft power pod 40
is shown in true center alignment with the central hull section 32,
and power pod 39 is lowered. Thus, with all propellers operating
for forward pull or thrust, respectively, the craft will roll over
a full 360.degree. to the starboard side in forward motion.
Reversing the propellers on all four power pods while the pods
remain in this position will result in the craft reversing its
direction of travel and rolling over a full 360.degree. to the port
side.
It should be emphasized, relative to FIGS. 8 and 9, that the
angular position of the power pods will determine the speed of
roll-over in relation to forward motion. For example, the roll-over
may take place slowly in a considerable distance of forward motion.
Or, the forward motion may be stopped and the roll-over
accomplished without any forward movement.
In FIG. 10, with the forward power pods 37 and 38 raised, with the
aft power pods 39 and 40 raised, with the forward propellers
exerting a pull and the aft propellers exerting a thrust, the craft
will do an inside loop-the-loop within a circle the diameter of
which is equal to the length of the hull. Reversing the direction
of rotation of the propellers while the power pods are in the
position thus described will result in an inside loop-the-loop in
the opposite direction. The degree of angle in the position of the
power pods will determine the diameter of the loop.
In FIG. 11, with the forward and aft power pods all turned down,
and with all propellers 58 operating to exert a pull downward, the
craft will submerge with the deck 15 remaining on a true horizontal
plane. By reversing the propellers 58 to exert a push upwardly, the
craft will surface with the deck 35 remaining in a true horizontal
plane.
In FIG. 12, with the forward and aft power pods turned down, with
the forward propellers exerting a pull and the aft propellers
exerting a thrust, the craft will do an outside loop-the-loop in a
forward direction within a circle the diameter of which is equal to
the overall length of the hull. By reversing the propellers while
the power pods are in this position, the craft will do an outside
loop-the-loop in reverse. Again, the degree of angle in the
position of the power pods will determine the diameter of the
loop.
With all of the maneuvers above described available, should it be
desirable to hover the craft over a given fixed spot at sea, even
in strong currents, the hovering position can be maintained through
manipulation of the power pods to a proper position where in
combination with the selective forward or reverse capability of the
power pods individually, compensation can be made for currents so
as to stabilize the said hovering position. Further, since all of
the motions heretofore described are available, it is possible to
turn the hull of the craft any angle or any degree from a
horizontal yawling position to any degree within a sphere, the
sphere being equal in diameter to the length of the hull. With
motions available as outlined in FIGS. 8 or 9, it is possible to
roll the hull to the port or starboard side to any degree and then
immediately reposition the power pods as in FIGS. 6 and 11 to cause
the craft to move off at a ninety degree angle from the
longitudinal center line of the craft.
CENTRAL HULL SECTION
It will be seen from the disclosure, and particularly FIGS. 13, 14
and 15 that the central hull section is capable of wide variations
in structure without affecting the basic hull design,
maneuverability and stability of the craft.
In FIGS. 13 and 14, there is shown a modification wherein the
central hull section 32 is provided with hinged top hatches 62 and
hinged bottom hatches 63, These hatches are provided with suitable
seals 64 to maintain the central hull section air and water tight,
when desired. The hatch and seal structure is shown in simplified
form, and in an operational craft this would be designed to the
size and requirements of the craft. If desired, the center strip 65
could be eliminated so that a hatch of substantially the entire
deck area could be obtained.
In this modification, various power means may be provided to
operate the hatches 62 and 63. One possible operative form is to
provide hydraulic cylinders 66 and links 67 to operate the top
hatches, while hydraulic cylinders 68 and links 69 are used to
operate the bottom hatches 63. The hydraulic cylinders 66 and 68
may be connected to any hydraulic control source.
It may be pointed out that the pontoons 30 and 31 will contain all
of the necessary structure, intelligence and control equipment
necessary to operate the submerged craft. This will include living
facilities, air supply and purifying equipment, sources of light
and heat, water and solid ballast, escape means and the like. These
involve details some of which are well known in the art and do not
form a part of the present invention as disclosed.
It should be emphasized that the pontoon sections of the hull are
separate and distinct from the central hull section. Access means
is provided in the form of sealed hatches or ports, such as 30a or
31a, FIG. 14, whereby personnel in the pontoon sections of the hull
may pass through the central hull section 32. These hatchways will
be sealed, and it is thus possible, when submerged, to flood the
central hull section with water without destroying the basic
operative buoyancy of the craft or without harm to the personnel in
the pontoon sections.
Pump means, such as a reversible pump 98, may be provided for
selectively admitting water to the central hull section or pumping
water therefrom. For admitting air to the central hull section, a
compressed air storage tank 99 may be connected to the central hull
section by a conduit 100, the conduit being provided with a control
valve 101. A suitable relief valve 102 is shown, to provide
selective release of air from the central hull section into the
pontoon 30 when water is pumped in, conserving the total air
supply.
The central hull section therefore provides a cargo area which can
be opened completely to the air when the craft is surfaced, or to
the sea when submerged, and the bottom of this area can be opened
completely to the sea when the craft is surfaced or when the craft
is submerged. The deck area and the pod area can be opened
completely to the sea. Thus, with this free area, the craft has the
capability of carrying additional personnel to assist in demolition
work or for reconnaissance behind enemy lines. It has the
capability of carrying demolition cargo, torpedoes, rockets,
detection systems equipment, or it may be put to other uses, as
desired, in any given military or naval operation. The cargo area
is completely independent of the power pods and pontoons, in
function and use.
In certain applications, depending upon the type of propulsion
unit, it might be desirable to use the cargo area as an added fuel
area for certain types of propulsion units, in order to extend
their range. In one particular design of craft, 17 feet, 5 inches
long, 7 feet wide, and 41 inches high, calculations have proven
that with existing available power units, 400 usable horsepower can
be applied to this craft for use through a range of 1 day at
maximum ocean depth. Due to the size of the craft, this high
horsepower would not be necessary to obtain the speed sought,
namely, 40 to 50 knots maximum. In the case of conversion of this
craft to a torpedo or guided missile vessel, unmanned, where
control is obtained either by a tracking device or a taping program
device, the maximum horsepower of 400 can be placed in the unit
with the result of speeds in excess of 50 knots, with longer range
and time, and with automatic start and stop characteristics.
A further modification of the central hull structure is shown in
FIG. 15. In this case, a rectangular through opening or well
defined by the end walls 33 and 34 and by the side walls is
provided. Access to this well may be had from either the top or
bottom of the hull. A separate sealed cargo box or cell 70 is
provided of a size to fit closely into the rectangular opening.
This box is provided with hoisting eyes 71 so that it may be
lifted, if desired, by the well known hoist crane. In each of the
pontoons 30 and 31, there are provided a plurality of locking dogs
72. These are selectively retractable and cooperate with
correspondingly positioned dogs sockets 73 in the side walls of the
sealed cargo box 70.
It will be seen that this modification of the invention offers many
possibilities for varied use. When the cargo box or cell 70 is
being carried, it is locked in place in the hull structure by means
of the locking dogs 72. If it is desired to unload the cargo box,
dockside, the dogs may be released and the hoisting crane may then
lift the box 70 completely out of the rectangular opening. If
desired, the craft may be submerged, the locking dogs released, and
the cargo box permitted to float to the surface. If it is desired
to plant a non-buoyant cargo box in shallow water, the dogs can be
released and the cargo box permitted to drop to the bottom below
the craft. Conversely, it is possible to load a buoyant cargo box
without dockside facilities. A buoyant cargo box can be floated on
the surface, the craft submerged, moved into position beneath the
box, and then raised to permit the cargo box 70 to slide into the
rectangular opening.
The arrangement of this modification presents great versatility for
both military and commercial application. An entire cargo can be
handled as a separate unit, without unduly tying up the vessel or
dockside operations. Hence, this modification presents extreme
utility in certain military and naval operations where dock
facilities are not available and where maximum secrecy of the
operation is desired.
FIGS. 17, 18, 19 and 20 show a modification of the craft which has
particular adaptability as a naval demolition unit or submarine
chaser. In this case, the forward portions of the pontoon sections
are not cut away to receive the power pods, but the forward power
pods 37 and 38 are made smaller than in the previously shown form
and are curved to conform to the shape of the pontoon structure.
The nose portions of the pontoon sections extend further forward
than in the earlier shown modification and are symmetrically shaped
for maximum streamlined efficiency. It will be noted that the nose
portions 74 and 75 of the pontoons are separable from the main
pontoon sections 30 and 31, respectively. The nose portion 74 is
hingedly connected to the pontoon section 30 by means of the hinge
76 so that it may be swung upwardly about the hinge, as shown in
FIG. 19. In like manner, the nose portion 75 is hingedly connected
to the pontoon section 31 by means of the hinge 77. Suitable
sealing and clamping means will be provided so that the nose
portions 74 and 75 are rigidly secured in closed position. The nose
portions 74 and 75 are provided with observation windows 78 on
opposite sides thereof and downwardly directed observation windows
79. These observation windows may be modified according to the
pressures at which the craft is designed to operate. As in the
previously disclosed modifications, there is a central hull section
32 and the end walls 33 and 34 define a central cargo area. This
cargo area is provided with top hatches 62 and bottom hatches 63,
as shown. Each of the nose portions 74 and 75 may be provided with
a light 80 so that strong beams may be projected ahead of the craft
during the operation thereof. Each of the pontoons 31 in the upper
section thereof preferably carries a tank 81 which provides an air
supply for recharging the scuba gear with which each of the
operating personnel in the craft will be provided.
In the use of this modification of the craft, it will be noted that
the pontoons 30 and 31 are so sized as to each receive a man lying
at full length on a suitable pad 82. Each of the men will be
dressed in full scuba diving equipment. Normally, an air supply
will be provided with the necessary controls so that a normal
operating pressure can be maintained within the sealed pontoon
structures. Means will be provided for replacement of fresh air or
for escape of used air. Under certain desired operating conditions,
the craft can move submerged to any given point. The operator in
one of the pontoons perfects his scuba equipment, connecting
himself to the mouthpiece of his scuba air supply. Air is then
released from the pontoon, and water allowed to enter until
pressures in the pontoon are equalized with the outside water
pressure. The forward nose portion 74 or 75 can then be released
and swung outwardly about the hinge 76 or 77. The operator may then
escape from the pontoon for reconnaissance work or to accomplish a
demolition objective and then return to his previous position in
the pontoon, closing and locking the nose portion. Air is then
allowed to enter into the pontoon, forcing out the water, and
pressure is then brought back to normal breathing conditions.
An instrument panel for a manned vessel of this type may be
installed within the hinged nose section, and such instrument panel
placed at a convenient angle to the operator. Food, water and other
sanitary facilities may also be provided. As pointed out in
connection with the basic craft, the central hull section may be
used to carry additional demolition personnel, suitable scuba
equipment, demolition cargo, explosives and the like. The cargo
hatches 62 or 63 may be opened while the craft is submerged, and
access may be had to the equipment while submerged without
surfacing the craft for exposure to enemy identification. It is
estimated that with this particular type of craft, dependent upon
the type of power source used, personnel would be able to stay at
sea for periods of time up to one month, coming to the surface
periodically for an exercise period.
FIGS. 21, 22 and 23 show a modification which presents a simplified
version of the demolition unit or submarine chaser shown in FIGS.
17 through 20. In this case, the two forward power pods have been
omitted, leaving the aft power pods 39 and 40. This will retard the
maneuvering of the craft considerably, but the cost of the craft
will be much lower, and for certain applications in naval or
military practice, this design might be applicable. The forward end
of the central hull section is rounded as at 83. Simplified hatches
are used, and there is shown a single top hatch 84 and a single
bottom hatch 85. Any suitable means may be used for fastening these
hatches in place.
FIGS. 24 and 25 show a further modification of the type of
demolition unit or submarine chaser that is shown in FIGS. 17, 18,
19 and 20. In this case, the structure is modified to permit
operation of the craft at a maximum depth of submersion. In
addition to the basic assembly described in connection with FIGS.
17 through 20, each of the pontoons 30 and 31 is provided with a
high pressure capsule 86. The pressure capsule will have a rounded
hinged head 87 which is fixedly attached to the nose portions 74
and 75. The said rounded hinged head of the pressure cap will be so
positioned that when the nose portion 74 or 75 is closed and
locked, the said head 87 will be in sealed relation with the main
body 86 of the capsule. A suitable sealing element 88 may be
interposed between the head 87 and the pressure capsule body 86. In
each of the pontoons outside of the pressure capsule, there are
provided forward vent openings 89 and rear vent openings 90. As in
the previous modification, each of the pontoons is provided with a
reserve air supply tank 81. A suitable conduit 91 leads from the
tank 81 and terminates in a valve 92. Installed in the heat 87 will
be a control panel, not shown, from which overall control of the
operation of the vessel may take place.
By using high pressure capsules for individuals within the
pontoons, it is then possible to take on ballast of sea water, oil
or any other material which might bring about the proper weight and
balance desirable under a specific application. The control lines
for the power pods and motors, as well as the control lines to
working components in the midsection of the hull are carried
through tube-like structures 93 and 94, shown above the pressure
chambers within the pontoon. Lines of the size and nature needed to
do these specific jobs will withstand maximum pressures under the
sea. Aside from the flood arrangements within the pontoons and the
central hull section to bring about the desired buoyancy and
ballast characteristics, it is possible to equalize the pressure
within the pontoons and the central hull section to that of the
surrounding area through vents 89 and 90. Thus, for example, at a
2,000 foot depth, the pressure in the central hull section and in
the pontoons surrounding the pressure capsule may be brought to the
same pressure as the water surrounding the craft. Thus, the shell
of the pontoon and the shell of the central hull section may be
constructed of materials like fiberglass, since these elements will
not have to stand maximum pressure. Pressurizing of the power pod
for extreme depth does not present any serious problem, since they
may be substantially braced and since the design of the motors and
fuel container by their very nature will be able to withstand
pressures.
In the view shown in FIG. 25, the hinged top hatches 62 and the
hinged bottom hatches 63 are provided with a plurality of
detachable torpedo tubes 95. When the hatches have been opened as
shown, the torpedoes can be fired therefrom at extreme depths,
since the tubes themselves will have equalized pressures around
them. In this type of construction, the initial thrust requirement
to discharge a torpedo is heavily reduced, since the torpedo does
not have to overcome exterior pressures as in the conventional
submarine torpedo tube installation.
FIG. 26 shows a fragmentary view of a pressure capsule which is
designed for extreme depths. In this case, the size of the vessel
will be increased so that the pontoons contain high pressure
spheres 96 of steel, aluminum or alloy construction. These spheres
can be so arranged within the pontoons to bring about balance and
can be connected by a series of high pressure tubes 97, permitting
transportation or movement from one sphere to the other by the
operating personnel. In the case of the capsules, as well as the
spheres, it is proposed to install a power charged mechanism which
would dispatch the capsules or spheres from the craft while the
vessel was completely submerged, in the event that power failure
would prohibit the craft from resurfacing.
It may be pointed out that the modification disclosed in FIGS. 13
and 14 would have maximum utility as a hydrophone tender, being
used for surveying, installation, maintenance and repair of
underwater systems. The central hull section may be of sufficient
size to accommodate complete shop facilities and equipment storage
facilities. In use at maximum depths, which might be required for
installation, maintenance and repair, the central hull section can
be pressurized, to match surrounding water area, permitting the
bottom of the hull to be opened fully to the sea for dispatching or
taking on hydrophone equipment. After taking on the equipment, the
craft may be surfaced, and by decompressing the central hull
section, personnel will be able to enter the section for repairs
and maintenance of the equipment. Under normal operating
conditions, the personnel would not be in the mid-section or center
hull section.
In cases where pressure requirements demand, the top and bottom
decks and hatches may be made curved for additional strength.
While there is herein shown and described the preferred embodiments
of the invention, it is nevertheless to be understood that minor
variations may be made therein without departing from the spirit
and scope of the invention as claimed.
* * * * *