U.S. patent number 3,559,921 [Application Number 04/825,105] was granted by the patent office on 1971-02-02 for standing take-off and landing vehicle (a gem/stol vehicle).
Invention is credited to Eugene L. Timperman.
United States Patent |
3,559,921 |
Timperman |
February 2, 1971 |
**Please see images for:
( Certificate of Correction ) ** |
STANDING TAKE-OFF AND LANDING VEHICLE (A GEM/STOL VEHICLE)
Abstract
An aerodynamic vehicle having a peripheral jet ground effects
machine system incorporated within the fuselage of the vehicle by
which it can take off and land from a standing position either on
land or on sea. An impeller or axial flow fan provides for
generation of power required to assist the vehicle into a stable
aerodynamic hovering condition after which conventional or other
known power sources propel the vehicle through flight.
Inventors: |
Timperman; Eugene L.
(Cincinnati, OH) |
Family
ID: |
25243121 |
Appl.
No.: |
04/825,105 |
Filed: |
April 24, 1969 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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629581 |
Apr 10, 1967 |
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Current U.S.
Class: |
244/12.3;
180/129 |
Current CPC
Class: |
B60V
3/08 (20130101); B64C 29/0025 (20130101) |
Current International
Class: |
B60V
3/00 (20060101); B60V 3/08 (20060101); B64C
29/00 (20060101); B64c 001/04 (); B60v
003/08 () |
Field of
Search: |
;244/7,12,23,100,101
;180/115--130 ;114/67.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Buchler; Milton
Assistant Examiner: Pittenger; James E.
Parent Case Text
BACKGROUND OF THE INVENTION
This application is a continuation application of my copending
application, Ser. No. 629,581, filed Apr. 10, 1967, now abandoned.
Claims
I claim:
1. In an aerodynamically-sound and amphibious vehicle including a
fuselage and power plant means, the combination with said vehicle
of a high wing lifting airfoil,
a rigid duct system structurally mounted within and comprising an
endless duct extending around the periphery of the bottom of said
fuselage,
nonclosable jet nozzle means formed peripherally about the base of
said rigid duct system for discharging a continuous stream of
gaseous fluid,
said fuselage being designed for buoyancy although water may enter
said nonclosable jet nozzle means,
means in said fuselage for ducting fluid flow to said rigid duct
system,
means in said ducting means for impelling such fluid flow to said
duct system,
said power means constituting a singular propulsion means for
propelling said vehicle to out of ground effects region and for
providing power to said impelling means, the power of said singular
means being traded between flying and hovering functions, and
whereby said vehicle is provided with standing takeoff and landing
characteristics.
2. The vehicle of claim 1 having an aft fuselage bottom gently
sloping upwardly from the rear portion of said nonclosable
peripheral jet nozzle to a rear extremity of said fuselage.
3. The vehicle of claim 1 having wings, the outer wingtips thereof
being sectioned and sealed to prevent water ingestion of such
wingtips.
4. The vehicle of claim 1 having a duct, flow path boundaries, and
flow splitters forming said rigid duct system for efficiently
directing such fluid flow into said nonclosable nozzle means.
5. The vehicle of claim 1 having a wide bottomed base in said
fuselage for disposing said rigid duct system and nonclosable
peripheral jet nozzle means therein.
6. The vehicle of claim 1 having power and transmission means
common to said propulsion means and impelling means for
interchangeable use therebetween.
7. In combination with an airborneable and amphibious vehicle
including a ground effects machine system,
an aerodynamically sound aircraft including a fuselage, said
fuselage being designed for buoyancy,
a wing airfoil mounted to said fuselage in a high wing
configuration,
propulsion means for said aircraft,
well means in and communicating with the exterior of said
fuselage,
means mounted in said well means for impelling fluid flow from the
atmosphere therethrough,
means for operating said impelling means,
nonclosable jet nozzle means formed in the base of said fuselage,
said design of the fuselage preventing sinking of the vehicle
although water enters said nonclosable means,
a rigid duct system mounted in and comprising an endless duct
extending around the periphery of the bottom of said fuselage
connecting said nonclosable nozzle means to said well means,
and
whereby fluid flow impelled through said well means and duct system
discharges through said nonclosable nozzle means thereby providing
for standing takeoff and landing characteristics in said
vehicle.
8. The vehicle of claim 7 having a wide bottomed base in said
fuselage for disposing said rigid duct system and nonclosable
nozzle means therein.
9. The vehicle of claim 8 including a duct, flow path boundaries,
and flow splitters forming said rigid duct system for efficiently
directing such fluid flow into said nonclosable nozzle means.
10. An aerodynamically sound and amphibious aircraft having a
fuselage, comprising in combination,
a wing airfoil mounted on said fuselage in a high wing
configuration,
said fuselage being designed for buoyancy,
a ground effects machine means within said fuselage and
comprising,
nonclosable jet nozzle means mounted and formed in the base of said
fuselage,
a rigid duct system mounted and disposed in and comprising an
endless duct extending around the periphery of the bottom of said
fuselage for ducting fluid to said nonclosable nozzle means, and
means in said fuselage for impelling such fluid through said rigid
duct system to said nonclosable nozzle means, and
means for propelling said vehicle to out of ground effect
region.
11. The vehicle of claim 10 having a singular propulsion means for
both said impelling and propelling means.
12. The vehicle of claim 10 having an aft fuselage bottom gently
sloping upwardly from the rear portion of said nonclosable jet
nozzle means to a rear extremity of said fuselage.
13. The vehicle of claim 12 including a wide-bottomed base in said
fuselage for disposing said rigid duct system and nonclosable jet
nozzle means therein.
14. The vehicle of claim 10 in which said rigid duct system
includes an endless duct, flow path boundaries forming said endless
duct, and flow splitters between said impelling means and endless
duct for efficiently directing such fluid into said nonclosable
nozzle means.
15. The vehicle of claim 10 including power and transmission means
common to said propelling and impelling means for interchangeable
use therebetween.
Description
1. Field of the Invention
The field of art to which the invention is most likely to pertain
is generally located in the class of apparatus relating to
aerodynamic structures. Class 244, Aeronautics, and Class 180,
Motor Vehicles, U.S. Patent Office Classifications, appear to be
the applicable general areas of art in which the claimed subject
matter of the type involved here has been classified in the
past.
2. Description of the Prior Art
Aeronautical apparatuses, the art to which this invention most
likely pertains, are disclosed in the following U.S. Pats. Nos.
3,275,270 and 3,177,959.
SUMMARY
This invention relates to an amphibious and aerodynamic vehicle,
and particularly relates to incorporation of a peripheral jet
ground effects machine system into an aerodynamic design for an
aircraft.
An object of this invention is to provide for an amphibious and
hovering nature in a vehicle whereby the vehicle can land and take
off at and from a point situs as distinguished from landing and
taking off along a given path generally associated with flight
patterns for known and conventional aircraft.
An object of this invention is to provide for a combination of an
aerodynamically sound vehicle with a peripheral jet ground effects
machine system and apparatus.
Another object of the invention is to provide for a peripheral jet
ground effects machine (GEM) system and apparatus within the
fuselage of an aircraft, as distinguished from supporting or
mounting same externally upon a fuselage.
Another object of this invention is to provide for a singular power
plant system for operation of both the GEM system and apparatus and
the aerodynamic system and structure of an aircraft.
Another object of this invention is to provide for the elimination
of various features common to and necessitated by aerodynamic and
hydrodynamic design in aircraft heretofore conventionally known as
amphibious, in particular, as to wing floats, stepped hydrodynamic
hull, structure for impact hull, retractable landing gear, and
oversized cruise power requirements.
Another object of this invention is to provide for an automatic
transition of an aircraft from an aerodynamic condition to a
hovering condition.
These and other objects of the invention will become more apparent
upon a reading of the following description, appended claims
thereto, and reference to the accompanying drawing comprising six
sheets.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective view of an aircraft embodying my
invention.
FIG. 2 is an elevational view of the fuselage of an aircraft
embodying my invention, partly in phantom, to show a combination of
elements thereof.
FIG. 3 is a front view of an aircraft embodying my invention,
partly in phantom.
FIG. 4 is a plan view of a fuselage of an aircraft embodying my
invention.
FIG. 5 is a plan view from below a fuselage of an aircraft
embodying my invention.
FIG. 6 is a perspective view of a fuselage of an aircraft embodying
my invention, showing the air current flow through an axial fan
employed in the operation of the GEM system.
FIG. 7 is another perspective view of a fuselage of an aircraft
embodying a modified form of my invention, showing air current flow
through a centrifugal fan employed in the operation of the GEM
system.
FIG. 8 is a schematic view cross-sectionally of a fuselage and from
which flow of air current in a GEM system through the vehicle is
shown, to provide an air cushion to cause the vehicle to hover.
FIG. 9 is a graph plotting distance against altitude corresponding
to landing, takeoff and flying steps of an aircraft embodying my
invention.
FIG. 10 is a schematic view cross-sectionally of a fuselage,
showing the centrifugal fan employed in the modified embodiment of
the invention.
FIG. 11 is a diagrammatic view of air current flow from the axial
fan into and through a portion of the duct system and structure
therefor.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawing in which reference characters
correspond to like numerals in the following description, FIGS. 1,2
and 3 illustrate an aircraft 20 embodying my invention. Air craft
20 comprises a fuselage 22, horizontal and vertical stabilizers 23
and 24, respectively, and a lift-producing airfoil 25 on which a
plurality of full-feathering reversible pitch propelling means 26
for displacement of the craft is mounted. A peripheral duct system
or means 30 (FIG. 2) is incorporated into and within the exterior
limits of fuselage 22, being mounted along and immediately adjacent
a relatively wide, flat bottom 28. A variable pitch ducted
propeller 32 is mounted in a housing well 33 connected to the top
wall 34 of fuselage 22 and communicating with the atmosphere for
capture and continuous passage or ducting thereof to duct means 30.
Operation of means 32 provides the power to cause fluid flow from
well 33 to means 30. In this embodiment, well 33 is generally
vertically disposed behind a passenger cabin 35 disposed forwardly
in fuselage 22 and provided for pilot and occupants of aircraft 20.
Housing well 33 communicates with duct system 30 for the purpose of
inducting air from the atmosphere for the ground-effects-machine
(hereinafter, GEM) system or means more fully described. A means
such as air inlet louvers 37 is mounted in top wall 34 at the
exterior termination of well 33 for opening and closing well 33 in
regard to the need for power input the GEM system.
A propulsion system or means for the GEM and aerodynamic flying
systems is provided in fuselage 22. Each of a pair of engines 38 is
mounted at an end of a common drive shaft 40 through an overrunning
clutch or other suitable connecting means 41 mounted between each
engine 38 and shaft 40. Each engine 38 counterrotates to the other
for effective transfer of power to turning means 26 and ducted
propeller 32. Vents 42 may be provided in the top of fuselage 22
and in vertical proximity to the positioning of engines 38 for air
cooling thereof.
In the illustrated embodiment which provides for an elevated wing
configuration as shown in the drawing, power transfer means is
provided between common drive shaft 40 and propelling means 26. As
shown in FIGS. 2 and 5, the power transfer means comprises a V-belt
arrangement 43 connecting common shaft 40 to a drive shaft means 44
(FIG. 5) disposed lengthwise in airfoil 25. A suitable drive
propeller turning gear 45 couples drive shaft means 44 to each
propeller shaft 46 of each means 26. As an alternative to V-belt
arrangement 43, a vertical drive shaft can be utilized together
with suitable turning gears provided at each of its ends for
respective coupling to common drive shaft 40 and drive shaft means
44. It should be noted that the V-belt itself is rotated through
90.degree. between its lower and upper ends so that its lower end
portions are respectively aligned with shafts 40 and 44 for proper
coupling thereto.
A turning gear mechanism whereby motive power is transmitted to and
from means 26 and ducted propeller 32 is provided along common
drive shaft 40. A clutch means 50 (FIG. 2) is mounted in shaft 40
and is adapted to cooperate with a turning gear means 52 in order
to transmit the power of shaft 40 to ducted propeller 32. A
vertically disposed shaft 54, which may be an extension of the
shaft for propeller 32 or otherwise connected with the shaft of
propeller 32, is suitable secured to its corresponding meshing gear
in means 52 thereby rotating propeller 32 as shaft 40 rotates and
clutch means 50 is engaged.
The preferred embodiment of my invention contemplates dual power
plants 38 for the purpose of obtaining twin-engine reliability.
These power plants may take the form of known internal combustion
engines utilized for conventional aircraft. It should be understood
that the invention is not limited to use of dual power plants as
illustrated. However, the advantage obtained in the mechanical
linkage immediately heretofore described is elimination of an
additional power plant for ducted propeller means 32, and thereby
utilize a singular propulsion means for the GEM system in addition
to such means for thrusting the vehicle through the atmosphere.
Thus, no useless weight is carried in flight. The centrally located
power drive shaft 40 from which power is traded to-and-fro between
the two systems, viz., the system in which thrust is developed for
flying and the GEM system for takeoff and landing operations,
provides for this advantage.
It should be further understood that the invention is not limited
to reciprocating engines 38, but other power plants, an example of
which is turbo shaft engines, may be utilized.
The GEM peripheral duct-system 30 is integrally incorporated within
relatively wide flat rigid bottom 28 of fuselage 22 and includes
rigid structural characteristics. Preferably, peripheral duct
system 30 protrudes (FIGS. 1, 3, 8) in a permanent configuration
from the sides of fuselage 22 to conserve on frontal area and to
provide for a maximum width hull. This system 30 comprises an
endless duct 60 (FIGS. 5, 6, 7) extending around the periphery of
bottom 28, preferably being partially formed by the inside walls of
the external skin of fuselage 22 together with additional walls 62
as shown in FIGS. 6 and 7. A nonclosable jet slot or nozzle means
64 is continuously or endlessly formed peripherally about the base
of duct 60 mounted in rigid duct-system 30 and which provides for
discharge of a continuous curtain or stream of gaseous fluid during
operation of the GEM system. The fuselage itself is designed with a
double sealed hull for water capability, as shown at 65 in FIG. 8.
The craft is capable of resting on water with sufficiency of
buoyancy to eliminate sinking of the craft although water may enter
nozzle 64. Nozzle 64 is not closed but is blown free of water
whenever ducted propeller 32 is in operation.
A pair of flow path boundaries 68 is mounted about the plane of
symmetry and aligned longitudinally of vehicle 20, and such
boundaries lie within well 33, as shown in FIGS. 6 and 8. These
boundaries 68 preferably take the form of aluminum or other
suitable metal fabrication known in the aircraft industry.
Boundaries 68 are connected with the interior walls of housing 33,
at their fore-and-aft ends, and with the floor of double hull 65,
to direct the flow of inducted fluid from propeller 32 into duct
system 30 and peripheral nozzle 64 in order to achieve an air
cushion effect. A cowl 69 for the shaft of ducted propeller 32
covers the elevated juncture of surfaces 68, as shown in FIGS. 6
and 8. All internal surfaces along which flow of fluid from
propeller 32 is carried are designed in accordance with standard
state of the art practices employed in internal aerodynamic designs
with reference to flow areas throughout the duct system or means
30.
Flow splitters, such as shown at 70 and 72 in FIG. 11, are provided
in duct system 30 for the purpose of dividing and directing fluid
flow efficiently therethrough. Flow splitters 70, 72 are securely
mounted in duct 60, preferably disposed in the vicinity of the
juncture of housing well 33 and duct 60. Flow splitter 70 is
disposed directly vertically below flow splitter 72, best seen in
FIG. 11, and directs a flow of inducted air, shown by arrows a,
into the portion of nozzle 64 adjacent the exit of housing well 33
while preventing this local portion of nozzle 64 from overflowing.
The trailing edge 70e of splitter 70 is secured to the interior
wall making up the skin of fuselage 22. Flow splitter 72 is mounted
in duct 60 above flow splitter 70 and directs the flow of fluid
excluded by splitter 70 through the remainder of peripheral duct
60, as shown by arrows b in FIGS. 11 and 6. The overall purpose of
these splitters 70, 72 is to achieve a constant or uniform static
pressure distribution along the entire length of continuous
peripheral nozzle 64. The surfaces of flow splitters 70 and 72 are
designed in accordance with flow area practices employed in
aerodynamic design. It should be understood, of course, that flow
splitters 70, 72 are also mounted in duct 60 on the other
longitudinal side of fuselage 22.
A spar 76 (FIG. 6) and a wing spar 77 extend throughout housing
well 33, near its upper terminus and in a plane generally the same
as airfoil 25, and are provided as supporting structure for
propeller 32. These spars 76, 77 are fixedly secured to housing
well 33 and airfoil 25, respectively, in a suitable and known
manner, while also being securely connected to a dome 78 mounted
upon the end of the rotatable shaft on which propeller 32 is
securely attached.
The immediately following description is directed to a general
description of components common to conventional aircraft, which
are aerodynamically sound, and which are included in and as part of
the preferred embodiment of my invention.
The preferred embodiment of the invention as contemplated by me at
the present time includes a basic wing plan form being rectangular
with uniform cross section for economical construction. Wing or
airfoil 25 is located on top of fuselage 22 in a high wing
configuration for amphibious purposes. Wing tips are sectioned and
sealed to prevent water ingestion of such wing tips. Full span,
split or slotted flaps 80 provide conventional high lift. Coupled
spoiler-deflectors 82, located toward the end of each of the wings
forming airfoil 25, are employed for aerodynamic lateral control.
Wing tip end plates 84 are installed to reduce the intensity of tip
vortexes
Flight propellers 26 are located on the leading edge of the wing in
a tractor configuration. Propeller nacelles 86 (FIG. 1) house only
drive shafts 46 and known conventional propeller pitch reversing
mechanisms (not shown) and, consequently, are of minimum size.
Horizontal and vertical stabilizers 23 and 24 are conventional. The
vertical stabilizer 24 is of a dorsal fin and rudder configuration
88, while the horizontal stabilizer 23 may be an all moving flying
surface which has become conventional on light planes in recent
years. Horizontal stabilizer 23 can be a stabilator as shown in
FIG. 1, being pivoted about a shaft (not shown) which extends
through the aft fuselage structure.
A description of the operation of craft 20 follows, and same may be
referred to, if necessary, to provide for a fuller knowledge of the
heretofore description thereof, and it is to be understood that the
following description is part of the disclosure of making and using
the subject matter of the invention.
For the purposes of explaining the operation of aircraft 20, the
landing operation will first be described and thereafter the
takeoff maneuver will follow. FIG. 9 graphically portrays the
following description. To land aircraft 20, thrust power is first
reduced to idle, thereby providing for the aircraft to enter a
steady state gliding flight path (indicated as APPROACH in FIG. 9)
which retains near-flight velocities. Drive propellers 26 are
feathered to a zero thrust setting. The GEM power clutch 50 is then
engaged and inlet louvers 37 are opened smoothly. Plant power is
then increased to a maximum setting while the pilot pushes forward
on the control column (conventional) to trim out a positive growth
in the pitching moment that would develop. Full span flaps 80 are
then lowered as the craft enters its final approach. With flight
velocity at a minumum and angle of attack moderately positive, the
craft is flown into the ground effect region (TRANSITION, FIG. 9).
As the craft approaches to within its transition height above the
resting surface over which it hovers, the craft aerodynamically
pitches its nose down and automatically assumes a near horizontal
attitude without additional pilot control. This is provided for by
the presence of the aft fuselage bottom 100 (FIG. 2) which gently
slopes upwardly in a region from the aft portion of peripheral
nozzle 64 to the rear extremity of fuselage 22 just under
horizontal stabilizer 23. The pressure distribution on surface 100,
and consequently the aircraft pitching moment, is modified by the
flow patterns that exist in this region, said flow patterns being
influenced by the varying action of the rear peripheral jet as
flight speed and altitude change. For maximum craft pitching moment
change due to this effect, surface 100 should be rather flat. If it
is preferred that the pitching moment changes be less severe, then
this aft fuselage surface 100 should be designed more curvilinearly
with respect to the fuselage cross section.
At this point (DECELERATION, FIG. 9), landing transition has taken
place and the craft is now riding on its GEM system which is
operating at maximum power through power plants 38. Immediately
upon reaching this horizontal attitude, reverse pitch can be
applied to flight propellers 26 and the craft halted in its forward
movement in a short distance. In other words, the aircraft is
landed on a maximum energy air cushion which gives a maximum static
hover height (indicated by dash lines in FIG. 9). This hover height
is then reduced to provide power for stopping. Minimum hover
height, that height necessary to clear ground obstacles, will
provide the shortest ground deceleration run. A taxi procedure may
then be employed, and when the craft is over its parking space, the
power is reduced smoothly and the craft is gently settled onto
resting skids 92 preferably provided on fuselage bottom 28 (FIG.
5).
Taking off of the aircraft is also graphically described in FIG. 9.
First, there is a GEM power input to ducted propeller 32 and its
ducted system 30 through which air is discharged from nozzle 64
whereby craft 20 is made to hover over its resting or standing
position. Proper management of thrust propeller pitch setting will
enable craft 20 to be translated and steered at low speeds to a
takeoff locality (TAXI, FIG. 9). The takeoff run is then
accomplished by first increasing power to the maximum and then
increasing the pitch of drive propellers 26 at a moderate rate to
climb pitch setting. The rate of pitch increase is adjusted so as
to provide a constant hover height. As power gradually increases to
the flight system, the GEM power input is automatically reduced.
This power transfer is accomplished in accordance with the increase
in forward speed and as aerodynamic lift increases, the base of the
ground effect machine system or base of fuselage 22 is unloaded. At
takeoff speed, the GEM power input can be essentially zero, with
all remaining thrust available to flight propellers 26. The GEM
power input becomes zero by reducing the pitch of ducted propeller
32. Subsequent disengagement of power clutch 50 and closing of
inlet louvers 37 is accomplished to secure the ducted system for
aerodynamic flight.
Control of vehicle 20, at low forward speeds, specifically during
taxi maneuvers, is accomplished by differential pitch settings
applied to thrust propellers 26 in either fore or aft
directions.
The operation of closing and opening louvers 37 may be accomplished
manually by the pilot, and conventional mechanical linkage between
the cabin of the aircraft and such louvers may be utilized
therefor, as such linkage constitutes well known structure readily
adaptable to aircraft 20 by a skilled mechanic.
A modified embodiment of the ducting means and duct system is
illustrated in FIGS. 7 and 10. This GEM system comprises a
centrifugal or radial flow fan 110 having a plurality of spaced
airfoil blades 112. Blades 112 are fixedly mounted in a generally
vertical fashion on a rotatably disc 114 supported by a vertically
disposed shaft 116. Shaft 116 is rotatably mounted on a pair of
suitable bearings 118, the lower one of which is fixedly secured in
double hull 65 and the upper one of which is fixedly secured to and
at the intersection of cross-struts 120 provided as supporting
members in the aircraft. For clarity, laterally disposed
cross-strut 120 is not shown in FIG. 7, whereas longitudinally
disposed cross-strut 120 is. Likewise, longitudinally disposed
cross-strut 120 is not shown in FIG. 10 while laterally disposed
cross-strut 120 is.
Cross-struts 120 are fixedly connected to a bell-shaped housing 122
disposed in fuselage 22 in like manner to that of housing 33 in the
earlier described embodiment. An airfoil faring 124 is provided in
housing 122 at its upper terminus, and covers an aft-wing spar 126
laterally extending through fuselage 22.
A drive mechanism is provided for shaft 116 by means of a pair of
meshed turning gears 130, one of which is secured on the end of
shaft 116 and the other being clutch-connected to common shaft
40.
A plurality of equally-spaced stator vanes 132 (FIG. 7) is
circumferentially fixedly mounted, in a vertical fashion, to double
hull 65, to cooperate with blades 112 in directing airflow to
peripheral duct 60.
In operation, with louvers 37 in unclosed condition, air is drawn
into housing 122 by the action of rotating blades 112 driven by
common shaft 40. The capture and flow of this air, passes
continuously through the vehicle as indicated by the composite
arrows c shown in FIG. 7. To provide for efficient fluid turning
into peripheral duct 60, curvilinear guide vanes 134 (FIG. 7) are
fixedly and spacedly mounted on hull 65 at a juncture of radial fan
110 and an ingress to peripheral duct 60. It should be understood
that vanes 134 illustrated in FIG. 7 are a representation of one of
four sets of vanes, each of which is symmetrically oriented on hull
65 at each of four intersecting junctures of radial fan 110 with
their respective ingresses to peripheral duct 60.
Pursuant to the requirements of the patent statutes, the principle
of this invention has been explained and exemplified in a manner so
that it can be readily practiced by those skilled in the art to
which it pertains, such exemplification including what is presently
considered to represent the best embodiment of the invention.
However, it should be clearly understood that the above description
and illustrations are not intended to unduly limit the scope of the
invention, but that therefrom the invention may be practiced
otherwise than as specifically described and exemplified herein, by
those skilled in the art, and having the benefit of this
disclosure.
* * * * *