U.S. patent number 3,715,991 [Application Number 05/069,726] was granted by the patent office on 1973-02-13 for monorail guided electric airplane.
Invention is credited to Thomas H. Boyd.
United States Patent |
3,715,991 |
Boyd |
February 13, 1973 |
MONORAIL GUIDED ELECTRIC AIRPLANE
Abstract
A transportation system combining the use of both a monorail and
an airborne vehicle powered by electric motors from an electric
power source located along the monorail. Rigid universally movable
struts interconnect the vehicle with the monorail with electric
cables housed by the struts for supplying electric current from a
power source to the motors. Landing-loading platforms are located
along designated locations at which the vehicle may be landed for
the pick-up and discharge of passengers.
Inventors: |
Boyd; Thomas H. (Hagerstown,
MD) |
Family
ID: |
22090830 |
Appl.
No.: |
05/069,726 |
Filed: |
September 4, 1970 |
Current U.S.
Class: |
104/23.1;
105/141; 104/119 |
Current CPC
Class: |
B64F
3/02 (20130101) |
Current International
Class: |
B64F
3/00 (20060101); B64F 3/02 (20060101); B64f
003/02 () |
Field of
Search: |
;;17/17.13
;104/22,23R,23FS,118,119,121,120 ;105/141,145,144 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Forlenza; Gerald M.
Assistant Examiner: Libman; George H.
Claims
What is claimed is:
1. A transportation system comprising an airborne vehicle in
combination with a monorail system, said vehicle being a rotary
wing aircraft propelled by rotor blades rotating about a vertical
axis for take-off and landing and further propelled by rotor blades
rotating about a horizontal axis for forward flight, said vehicle
having electric motors for turning said rotor blades, said monorail
system comprising a T-beam mounted along longitudinally spaced
support columns, said monorail system further including
loading-landing platforms located in the immediate vicinity of said
T-beam, a carriage mounted for rolling movement along the length of
said T-beam, first electric conductor cables located within said
carriage and parallel to said beam, rigid universally movable strut
means interconnecting said vehicle to said carriage, said strut
means including a first and second pivotal connection respectively
at said vehicle and at said carriage for movement about an axis
parallel to the longitudinal axis of said T-beam and further
including a third and fourth pivotal connection respectively at
said vehicle and said carriage for movement about an axis
transverse to the longitudinal axis of said T-beam, and conducting
cable means electrically connecting said vehicle motors with said
first conductor cables for the transmission of electric current to
said motors.
2. The system according to claim 1 wherein said carriage surrounds
the upper portion of said T-beam and is provided with rollers in
rolling contact with opposite sides of the T-beam horizontal
flanges and with opposite sides of the T-beam vertical stem
portion.
3. The system according to claim 2 wherein said conducting cable
means includes a contact plate mounted for sliding contact with
each of said first conductor cables and further includes a second
conductor cable connected to each said contact plate.
4. The system according to claim 2 wherein a pair of said first
electric conductor cables is provided, each being located on
opposite sides of said T-beam vertical portion, and wherein said
strut means further includes a pair of struts each being associated
with one of said second cables and each being pivotally
interconnected with said carriage at a respective one of said
rollers in contact with said T-beam flanges for movement about an
axis transverse to said T-beam longitudinal axis.
Description
This invention relates generally to a novel high-speed
transportation system and, more particularly, to such a system
which makes use of an airborne vehicle tethered to a monorail
system having designated areas for both landing the vehicle and for
serving as passenger loading and discharge stations.
A wide variety of systems have and are currently in the process of
consideration relating to more rapid and economical means of
transportation of both cargo and passengers for both short and long
journeys in either interurban and/or intercity travel. Among these
are ground surface systems which include the monorail wherein a
high-speed train of cars is elevated for movement above grade
level, the various sub-surface systems, public bus and railroad
transportation systems. Also, several of the airborne
transportation systems which have met with limited success include
the use of helicopters, vertical take-off and landing craft and
other more conventional aircraft. Of these various systems, the
subway, bus and train systems lend themselves most readily to the
transportation of a high volume of passengers between points within
the city and its suburbs. Although each of these enumerated systems
is designed for an assortment of transportation needs, many of them
are limited in their use for wide-spread service needs because they
are either too costly, or not sufficiently high-speed nor
sufficiently capable of transporting increased numbers of
passengers at low cost. In highly-populated areas air pollution
from an increased use of our public transportation systems has
become a significant factor in preferring one over the other. Also,
extensive use of elevated highways or bulky monorail structures has
been discouraged oftentimes because of the attendant noise
pollution problems and because of their unsightly presence in urban
or suburban communities. It is, therefore, the underlying object of
the present invention to provide a rapid high density
transportation system offering not only high speed but low noise
level, reliability, economy and a cleaner operating system by
combining the advantages of an electrically powered airborne
vehicle transportation concept and the monorail system of
transporting.
Another object of the present invention is to provide such a
transportation system which employs the advantages of the advanced
rotary winged aircraft and the many benefits achievable with
electric power.
A further object of this invention is to provide such a
transportation system which uses an airborne vehicle tethered to a
movable carriage mounted for rolling along a monorail as part of a
system which includes a number of landing-loading platforms as
passenger stations in several designated areas.
A still further object of the instant invention is to provide such
a system wherein the airborne vehicle is interconnected to a
movable carriage by means of struts which are mounted for universal
movement of the vehicle.
A still further object of the present invention is to provide such
a transportation system wherein electric conductor cables are
located along the monorail within the carriage and cable means are
provided which electrically interconnect the conductor cables with
electric motors provided for the airborne vehicle.
Other objects, advantages and novel features of the invention will
become apparent from the following detailed description of the
invention when considered in conjunction with the accompanying
drawings wherein:
FIG. 1 is a perspective view of the high-speed transportation
system in accordance with the present invention;
FIG. 2 is a sectional view of the carriage, monorail and a portion
of the airborne vehicle showing the interconnection between the
two;
FIG. 3 is a partial side view of the monorail and the attached
carriage taken along the line 3--3 of FIG. 2; and,
FIG. 4, is an end view showing the aircraft, in part, tethered to
the monorail system for universal movement.
Turning now to the drawings wherein like reference characters refer
to like and corresponding parts throughout the several views, there
is shown in FIG. 1 an airborne vehicle 10 powered by electric
motors 11 for driving both rotary blades 12 and propellers 13 which
obviously rotate about vertical and horizontal axes, respectively.
The airborne vehicle is tethered to a monorail which comprises
substantially a T-beam construction 14 conveniently secured along a
plurality of spaced columns 15. The T-beam monorail may be of any
well-known reinforced or prestressed concrete construction and the
columns 15 may also be of a concrete construction or may be of
steel, if desired. A platform structure 16 forms a part of the
present transportation system and is shown in FIG. 1 as one of
several stations which is to be located in the vicinity of the
monorail in as many locations therealong as necessary. This
construction may serve as both a waiting station for passengers and
as a loading platform for the airborne vehicle which may
conveniently land thereon for admitting and discharging passengers
and/or cargo at the station. In FIG. 2, it can be seen that the
airborne vehicle 10 is interconnected with the monorail through a
carriage 17 which surrounds the upper portion of the monorail and
which is mounted for rolling movement therealong by means of
rollers 18, which engage the top side of each horizontal flange of
the T-beam, and by means of rollers 19 which engage the bottom side
of the horizontal flange. As shown in FIG. 3, pairs of these upper
end lower rollers 18, 19 snugly embrace opposite sides of the
T-beam flanges so as to lend stability to the moving carriage.
Also, rollers 21 are provided in rolling contact with the vertical
stem portion of the T-beam so as to further insure stability of the
carriage during its rolling along the monorail.
As can be seen in FIG. 2, a pair of struts 22 are provided for
structurally interconnecting the airborne vehicle with the carriage
17 surrounding the monorail. The struts are secured to the
underside of the airborne vehicle in any convenient manner
preferably at the center of gravity for the vehicle, each strut
being pivotally connected as at 23 to the vehicle connector bar 24
for movement by each strut at 23 about an axis parallel to the
longitudinal axis of both the airborne vehicle and the monorail.
Each strut is interconnected at its other end with a roller axle 26
of one of the rollers 18 through a bar 25. Each bar is pivotally
connected to the axle 26 at one end for movement about an axis
transverse to the longitudinal axis of the T-beam and is
interconnected with the strut 22 at its other end as at 27 for
movement about an axis parallel to the longitudinal axis of the
T-beam. Also, the upper end of each strut is interconnected with
connector 24 by means of a short bar 34 for pivotal movement as at
35 about an axis also transverse to the monorail longitudinal axis.
With such an arrangement, it can be seen that the airborne vehicle
10 is capable of substantially universal movement with respect to
the carriage while it is being pulled by the airborne vehicle along
the T-beam.
The electric motors 13 of the airborne vehicle are powered through
means of electric conductor cables 28 which are disposed within the
carriage 17 parallel with the longitudinal axis of the T-beam and
beneath the lower surface of the T-beam flanges. These cables are
arranged and function in a manner similar to the well-known trolley
car and railroad engine conductor cables. Here, the conductor
cables 28 are designed to supply electric current to the electric
motors 13 through conducting cables 29 which are each secured at
one end to the carriage 17 to a rod member 31 and at their other
ends to the electrical system of the aircraft. since each of the
struts 22 may be designed as hollow tubes, a portion of the cables
29 is housed by each strut as the cable passes therethrough. At the
rod 31 end of the cables, it can be seen that a contact plate 32 is
mounted at one end of each rod for sliding contact with each of the
conductor cables 28. Also, each of the conductor cables may be
completely shielded from the weather elements by means of an
elongated angle iron 33 secured to the underside of the T-beam
flanges.
In operation, the airborne vehicle 10 simply takes off from the top
of the platform structure 16 as electric current is supplied from
the electric conductor cables 28 to the electric motors 11 which
drive the forward propellers 13 for forward speed and which also
drive the rotor blades 12 during take-off and landing and during
the low speed regimes. All power is fed into the rotor for take-off
and touch-down and, during the transition to forward flight, the
power is phased out of the rotor system and is fed into the forward
propellers. This transition is accomplished when the rotor is in
auto-rotation so that all the power may be used for driving the
forward propellers. During initial take-off, landing and slow speed
flight the rotor carries all the vehicle weight. During high-speed
flight, the wing will carry substantially all weight. Between these
extremes the transition is smooth and automatic. Between stations
16, which may be conveniently located at designated areas for
either interurban or intercity travel, and which may be provided at
ground level elevations if desired, the airborne vehicle is
confined to an air space surrounding the monorail which is defined
by the length of struts 22. Also, the struts and the cables 29 may
be separable by means of an explosive separator or other type
device (not shown) so as to permit the vehicle to smoothly land
unimpeded through autorotation during an emergency.
From the foregoing, it can be seen that an extensive route network
is possible with the present design comparable to those electric
distribution systems used to power electric locomotives and
electric trolley cars with the added distinct advantages of
increased travel speed, reliability and economy in both
construction of the monorail system and due to the availability of
the high capacity rotary winged aircraft. With the use of electric
motors for powering the airborne vehicle, it can be seen that the
noise level and the air pollution during operation may be held to
an absolute minimum while transporting large numbers of passengers
quickly and frequently as part of a scheduled service. Because the
monorail system does not serve to structurally support the
transportation vehicle as it does in conventional support the
transportation vehicle as it does in conventional monorail systems,
the T-beam and its supporting columns may be of a light and simple
construction thereby greatly reducing costs while at the same time
raising the vehicular track above the ground so as to reduce
interface problems with ground transportation, with natural
obstacles and with planned roadways. Also, the light and simple
structural requirements of the T-beam monorail greatly reduces real
estate purchasing costs otherwise necessary with the use of
freeways, railways and interstate highways and reduces right-of-way
maintenance costs and real estate taxes which are a continual
burden for the railroad companies. The speed capability of the
present transportation system greatly exceeds that of existing
ground transportation systems and the highly reliable electric
motors, proven through many years of operation, offer a virtually
unfailing power source which therefore places safety first among
all current modes of transportation. Other appealing
characteristics of this high-speed transportation system are that
refueling is not required yet the airborne vehicle is completely
reliable and requires only minimal maintenance. Also, those weather
conditions which would normally tend to interrupt service of many
of the existing transportation systems will produce no adverse
effect on the smooth and efficient operation of the present
transportation system. Most importantly, the low noise level
characteristic of electrical power is taken advantage of by the
present invention with little or no concern of air pollutants being
emitted along the system networks. Any air pollution is
concentrated at the power stations where they may be more readily
controlled.
Obviously, many modifications and variations of the present
invention are possible in the light of the above teachings.
It is, therefore, to be understood that within the scope of the
appended claims, the invention may be practiced otherwise than as
specifically described.
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