COMBINED SUBMERSIBLE VESSEL AND UNMANNED AERIAL VEHICLE
A combined submersible vessel and unmanned aerial vehicle preferably includes a body structure, at least one wing structure coupled to the body structure, at least one vertical stabilizer structure coupled to the body structure, and at least one horizontal stabilizer structure coupled to the body structure. A propulsion system is coupled to the body structure and is configured to propel the flying submarine in both airborne flight and underwater operation. Preferably, the propulsion system includes a motor, a gearbox coupled to the motor and configured to receive power generated by the motor and provide variable output power, a drive shaft coupled to the gearbox and configured to transfer the variable output power provided by the gearbox, and a propeller coupled to the drive shaft and configured to accept power transferred to it from the drive shaft. The propeller is further configured to rotate and propel the flying submarine in both an airborne environment and in an underwater environment.
Latest AURORA FLIGHT SCIENCES CORPORATION Patents:
This application claims priority to U.S. Provisional Patent Application No. 61/061,989, filed Jun. 16, 2008, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTIONThe present invention relates to unmanned aerial vehicles, and unmanned submersible vehicles. More particularly, the invention relates to a combined submersible vessel and unmanned aerial vehicle, and to methods for operating same.
In today's security conscience environment, especially in view of the Sep. 11, 2001 terrorist attack on the World Trade Center, many countries, including the United States of America, are increasing their border surveillance resources. However, while security in terms of terrorism is omni-present, many other agencies are also interested in border surveillance, including the Federal Bureau of investigation (FBI), the U.S. Drug Enforcement Agency (U.S. DEA), and the U.S. Border Patrol, as well as many other state and local government agencies. All of these U.S. agencies, and their foreign counterparts, are extremely interested in protecting their citizens from illegal immigration, narcotics, and other law breakers seeking to cross borders to evade or escape capture, or to commit other crimes.
Any one of the above-noted agencies wants to conduct what is known as intelligence, surveillance, and reconnaissance (ISR) operations below the surface of the water (to capture drug smugglers that are learning to make and use submersible vehicles), at the surface (especially the use of “cigarette” type speedboats), and above the surface (in the air, using multi-prop turbo-prop aircraft). Today this requires the use of multiple specialized assets: unmanned aerial vehicles (UAVs), unmanned underwater vehicles (UUVs), and unmanned submersible vehicles (USVs). Having one asset that can cover all three environments would be a very cost effective means of conducting ISR operations to capture and or prevent such lawbreaking activities.
In the past, efforts have been made to build true flying submarines, but with limited success. One well-known effort is the Reid Flying Submarine, which is described in “The Flying Submarine: The Story of the Invention of the Reid Flying Submarine,” by Bruce Reid Heritage Books, Inc. (October 2004), and detailed in U.S. Pat. No. 3,092,060 to D. V. Reid. In the '060 Patent, one propeller is used for surface and submerged propulsion, while another propeller is used for flight. Surface and submerged vehicles are described in U.S. Pat. No. 5,237,952 “Variable Attitude Submersible Hydrofoil”, and U.S. Pat. No. 5,373,800 “Sea Vessel.” Neither is capable of sustained flight.
Thus, a need exists for a surveillance asset with the ability to conduct ISR operations below the surface of the water, at the air-sea interface, and above the surface of the sea, in the air.
SUMMARY OF THE INVENTIONIt is therefore a general feature of the present invention to provide a combined submersible vessel and unmanned aerial vehicle that will obviate or minimize problems of the type previously described.
According to a first aspect of the present invention, a flying submarine includes a body structure, at least one wing structure coupled to the body structure, at least one vertical stabilizer structure coupled to the body structure, and at least one horizontal stabilizer structure coupled to the body structure. A propulsion system is coupled to the body structure and is configured to propel the flying submarine in both airborne flight and underwater operation. Preferably, the propulsion system includes a motor, a gearbox coupled to the motor and configured to receive power generated by the motor and provide variable output power, a drive shaft coupled to the gearbox and configured to transfer the variable output power provided by the gearbox, and a propeller coupled to the drive shaft and configured to accept power transferred to it from the drive shaft. The propeller is further configured to rotate and propel the flying submarine in both an airborne environment and in an underwater environment.
According to a second aspect of the present invention, a method for operating a flying submarine includes the steps of: (i) providing a rocket propulsion system to cause exhaust propulsive matter from the rocket propulsion system to propel the flying submarine; (ii) flooding a ballast tank with water; (iii) placing the flying submarine at an appropriate water exiting depth; (iv) accelerating the flying submarine to about a maximum forward velocity with a propeller propulsion system; (v) placing the flying submarine at a water exit angle; (vi) firing the rocket propulsion system at or just below a water-air interface, thereby providing an exhaust propulsive matter from the rocket propulsion system and propelling the flying submarine to a water exit velocity; (vii) unfolding one or more wing structures on the flying submarine to a flying position just at or above the water-air interface; and (viii) reversing the propeller propulsion system to operate the propeller in an airborne mode.
The novel features and advantages of the present invention will best be understood by reference to the detailed description of the preferred embodiments that follows, when read in conjunction with the accompanying drawings, in which:
The various features of the preferred embodiments will now be described with reference to the drawing figures, in which like parts are identified with the same reference characters. The following description of the presently contemplated best mode of practicing the invention is not to be taken in a limiting sense, but is provided merely for the purpose of describing the general principles of the invention.
According to an exemplary embodiment of the present invention, the combined submersible vessel and unmanned aerial vehicle (the “Pelican” or, “flying submarine”) 100 is capable of both air and underwater operations. The flying submarine 100 includes the features of underwater buoyancy, gliding, and/or conventional propeller driven propulsion; re-deployable wings for multimode operation; chord-wise wing fold which doubles as control surface; a hydro-spike for water entry; means of re-launching from the water (either water rocket or solid fuel); modular nose payload bay (for different types of sensors); floodable center-body payload bay for measuring water salinity, temperature, contaminants, among others; conformal battery packs, as shown in
Preferably, the flying submarine is: approximately 1-6 meters long, more preferably 2-5 meters long, even more preferably 2-4 meters long, and most preferably 2 meters long; approximately less than or equal to 1 meter in diameter, more preferably, less than or equal to 0.5 meter in diameter, even more preferably less than or equal to 0.3 meter in diameter, and most preferably less than or equal to 0.2 meter in diameter; and weighs approximately 3-20 Kg, more preferably 5-15 Kg, even more preferably 7-12 Kg, and most preferably 10 Kg. The flying submarine may be deployed from aircraft, surface vessels, submarine vessels, or launched from shore facilities. Deployment may be in single units, or ripple-deployed in multiple unit salvos, using canisters, racks, tubes, etc. The flying submarine 100 may be recovered and reconditioned for further deployments, or it may be used in a fire-and-forget fashion.
Preferably, flying submarine 100 is used to operate autonomously, to obtain intelligence, conduct surveillance, and perform reconnaissance missions without direct supervisory control for most of the time. For example, flying submarine 100 preferably uses artificial intelligence software in a one or more processor-controlled flight control system to track drug-smuggling underwater boats, surface to report on the information, re-obtain position information from global positioning satellites, and then continue to monitor the same from a different position, as it flies, surface-swims, or submerged-swims to a new location to interdict the illicit underwater activities.
Flying submarine 100 reconfigures for water entry—the wings are stowed, and the propeller is folded prior to water entry. While submerged, flying submarine 100 performs underwater ISR. For long-endurance underwater operations, flying submarine 100 can re-deploy its wings and buoyancy glide underwater. To resume airborne operations, flying submarine 100 accelerates toward the sea surface and a fire a water-rocket just as the surface is breached. After returning to airborne mode, Pelican conducts aerial ISR and/or communications while en route to new transition point. The communications can be to/from ground-based, sea-based, aerial, or satellite-based platforms.
Flying submarine 100 preferably includes high-density energy storage. According to a further embodiment, packaging and buoyancy requirements suggest a vehicle energy source with very high energy density. Modern battery chemistries such as Li-Polymer and Li-Sulfur provide sufficient energy density.
Flying submarine 100 also preferably includes a body or hull 104, re-deployable forward wings 102, and re-deployable rear wings 106 wings. The hull 104 is preferably a composite hull with an integrated composite-over-wrapped pressure vessel that is lightweight, flexible, and strong. The wings of flying submarine 100 are repeatedly deployed and stowed (in two configurations) to accommodate different mission phases. The wing redeployment actuation mechanisms of flying submarine 100 can provide sufficient actuation authority to deploy and stow wings repeatedly, underwater, in the air, or on the surface, while moving or while stationary. While two wing positions are shown in
The nose 108 of flying submarine 100 includes a modular payload bay 110 that carries sensors 112, such as plug-and-play payloads and sensors, e.g., infrared cameras, electro-optical sensors, visible light cameras, SONAR, radar, etc. Preferably, the nose 108 is covered with a Lexan, glass, or plastic dome 109 to protect the sensors 112 and provide aerodynamic stability. Behind the nose 108 is a sea-surface locating acoustic sounder 114 used to locate the flying submarine 100 when traveling or loitering on the surface. Below the sounder 114 is an Acoustic Doppler Current Profiling (ADCP) instrument 116 to produce a record of water current velocities for a range of depths. Behind the ADCP 116 is a precision, integrated IMU/GPS (Inertial Measurement Unit/Global Positioning System) processor-based instrument 118 for aerial, sea-surface, and sub-surface navigation. Behind the IMU/GPS 118 is a compartment preferably containing one or more Li—S batteries 126 in a water-proof container. Placing the battery weight directly below the forward wings 102 improves flight and glide stability.
The forward wings 102 of flying submarine 100 are rotatably mounted to the body 104 with a rotation pin 120, which allows movement between a stowed (rearward swept) position and one or more deployed positions (perpendicular to the longitudinal axis of the flying submarine 100 or otherwise). The pin 120 may include one or more mechanical ratchet devices (not shown) to lock the wings into one or more of the above-described positions. One or more actuators (not shown) control the movement of each (or both) of the forward wings 102. Each forward wing 102 may include one or more flight control surfaces, such as ailerons 122, which are controlled in a known manner by a flight control computer 124. Each wing 102 may also include one or more solar panels 124 to recharge batteries 126 while the vehicle is in flight or loitering on the surface. In the deployed position(s), the front wings 102 have an upward dihedral angle of 1-30 degrees, and more preferably 5-20 degrees, even more preferably 7-15 degrees, and most preferably 10 degrees (see
Preferably above the batteries 126 is disposed one or more ballast tanks 128 which are used to control diving, rising, and submerged operations is a known manner. The ballast tanks 128 are controlled by one or more activatable valves (not shown), controlled by computer 124. Aft of the batteries 126 is one or more floodable amidships modular payload area 130, which is designed to contain undersea sensors, such as plug-and-play SONAR, deployable sonar sensors, etc. This space may also be used as ballast, as needed. Aft of the payload area 130 is preferably a ballast reservoir and water rocket 132 (to be described in more detail below). Briefly, the water rocket reservoir cooperates with a propulsion system (to be described below) to generate a water rocket that flows aft, through a thru-hub water rocket nozzle 134 to provide thrust for propelling the flying submarine, preferably when it moves from subsurface into the air. The nozzle 134 may incorporate thrust-vectoring technology for maneuvering in the air, on the surface, or under the surface.
Rear wings 106 preferably have flight control surfaces (e.g., ailerons 138) and solar panels similar to forward wings 102. However, since the rear wings 106 act as horizontal and vertical stabilizers, the flight control surfaces may be differently configured and differently actuated. The control surfaces 138 are preferably controlled by computer 124. A rotation pin 136 allows the rear wings 106 to pivot between a stowed position (forward swept, under the stowed front wings 106), to a deployed position (perpendicular to the longitudinal axis of the flying submarine 100 or otherwise), to a water-entry position (where the rear wings 106 are swept aft; see
Near the mission computer 124 is preferably disposed a Tactical Control System (TCS) Level IV compatible digital data link 140, which is the software, software-related hardware and extra ground support hardware used for the remote control of the UAV. The TCS 140 also provides connectivity to identified Command, Control, Communications, Computers, and Intelligence (C4I) systems. The software provides the UAV operator the necessary tools for computer related communications, mission tasking, mission planning, mission execution, data processing, and data dissemination. The software also provides a high resolution, computer generated, graphics user interface that enables a UAV operator that is trained on one system to control different types of UAVs or UAV payloads with minimal additional training. The TCS has an open architecture and is capable of being hosted on computers that are typically supported by the using entity. Preferably, a Tactical Common Data Link (TCDL) within the TCS is used for communicating with assets such as aerial, space-based, surface, ground, and submerged platforms.
Preferably located beneath rotation pin 136 is another set of Li-s batteries 142, in a compartment with a water-proof container for holding the batteries 142. Again, lacing the battery weight directly below the rear wings 106 improves flight and glide stability. Aft of batteries 142 is one or more electric motors 144 configured to power a propeller 146 in both airborne and seaborne operations.
The propeller preferably has a latching/pivot mechanism 156 that allows the blades to be stowed forward for launch and aft for water entry and exit. According to the preferred embodiments, flying submarine 100 further includes a propulsion system (to be described in greater detail below) enabling a smooth water-to-air transition. Upon leaving the water, flying submarine 100 rapidly accelerates to airborne cruise speed that is approximately 30× faster than its typical underwater cruise speed. The wings can be stowed, partially deployed, or fully deployed during the sea-to-air transition, or they may be variably deployed (full-to-swept or swept-to-full) during the transition as air speed increases.
One of several different rocket propulsion systems, as shown in
The propulsion system shown in
The propulsion system shown in
The propulsion system shown in
According to the embodiment shown in
Details of the gearbox are shown in
The individual components shown in outline or designated by blocks in the attached Drawings are all well-known in the aerospace and sea-vessel arts, and their specific construction and operation are not critical to the operation or best mode for carrying out the invention.
While the present invention has been described with respect to what is presently considered to be the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
All U.S. patents discussed above are hereby incorporated by reference into the Detailed Description of the Preferred Embodiments.
Claims
1. A flying submarine, comprising:
- a body structure;
- at least one wing structure coupled to the body structure;
- at least one horizontal stabilizer structure coupled to the body structure; and
- a propulsion system coupled to the body structure and configured to propel the flying submarine in both airborne flight and underwater operation, wherein the propulsion system includes: a motor; a gearbox coupled to the motor and configured to receive power generated by the motor and provide variable output power; a drive shaft coupled to the gearbox and configured to transfer the variable output power provided by the gearbox, and a propeller coupled to the drive shaft and configured to accept power transferred to it from the drive shaft, and further configured to rotate and propel the flying submarine in both an airborne environment and in an underwater environment.
2. The flying submarine according to claim 1, wherein the propulsion system is further configured to (i) operate the propeller within a first RPM range when operating in an air environment, and (ii) operate the propeller within a second RPM range when operating in a water environment, and wherein a first set of RPM values in the first RPM range are greater than a second set of RPM values in the second RPM range.
3. The flying submarine according to claim 1, wherein the propeller comprises at least two blades, wherein the propeller is disposed at a tail end of the flying submarine, opposite a nose of the flying submarine, and wherein the at least two blades are configured to fold forward and backward with respect to the nose of the flying submarine.
4. The flying submarine according to claim 3, wherein, when the flying submarine is in a stored configuration, the at least two blades of the propeller are configured to fold forwards, towards the nose of the flying submarine.
5. The flying submarine according to claim 4, wherein, when the flying submarine is in a water entry configuration, the at least two blades of the propeller are configured to fold backwards, away from the nose of the flying submarine.
6. The flying submarine according to claim 5, wherein, when the blades of the propeller are folded, structural loads thereon are reduced upon entry into the water environment.
7. The flying submarine according to claim 6, further comprising a latch configured to prevent the propeller from returning to a stored configuration following unfolding from the stored configuration.
8. The flying submarine according to claim 7, wherein the latch is further configured to be releasable following unfolding from the stored condition such that the propeller is stored again with the blades folded forward.
9. The flying submarine according to claim 1, further comprising: at least one battery, configured to store electrical energy, and wherein the motor comprises an electric motor configured to receive power from the battery.
10. The flying submarine according to claim 1, wherein the motor is further configured to rotate in both a clockwise direction and in counter-clockwise direction.
11. The flying submarine according to claim 1, the motor is rotatable in two directions.
12. The flying submarine according to claim 1, wherein the gearbox comprises a plurality of gear sets configured to operate the propeller within a first set of RPM values in an air environment, and to operate the propeller within a second set of RPM values in a water environment.
13. The flying submarine according to claim 12, wherein the plurality of gear sets comprises:
- a first set of gears with a first gear ratio; and
- a second set of gears with a second gear ratio, and wherein, when the motor is operating with the first set of gears, the propeller is configured to operate within the first set of RPM values, and wherein, when the motor is operating with the second set of gears, the propeller is configured to operate within the second set of RPM values.
14. The flying submarine according to claim 13, wherein the first set of gears is configured to rotate the propeller in a rotational direction opposite that of the motor, and wherein the second set of gears is configured to rotate the propeller in a rotational direction identical to that of the motor.
15. The flying submarine according to claim 13, wherein each of the first set of gears and the second set of gears is mechanically coupled to a propeller shaft via a one way clutch.
16. The flying submarine according to claim 15, wherein the one way clutch is selected from the group consisting of a ratchet, and a roller needle clutch.
17. The flying submarine according to claim 15, wherein the one way clutch is configured to rotate the propeller in a forward direction regardless of the rotation direction of the motor, and further wherein an RPM of the propeller corresponds to (i) the RPM of the motor and (ii) the respective gear ratios of the first gear set and the second gear set.
18. The flying submarine according to claim 1, further comprising:
- a hull coupled to said body structure;
- a propeller shaft, mechanically coupled to the propeller; and
- a magnetic coupler (i) mechanically coupled to the driveshaft, (ii) mechanically coupled to said hull, and (iii) magnetically coupled to said propeller shaft, wherein the magnetic coupler is configured to rotate the propeller shaft via the magnetic coupling between the magnetic coupler and the propeller shaft.
19. The flying submarine according to claim 18, wherein the propeller shaft comprises:
- a hollow shaft; and
- a rocket propulsion system exhaust tube concentrically located within the hollow shaft.
20. The flying submarine according to claim 18, further comprising: a rocket propulsion system coupled to the body structure, wherein the rocket propulsion system is configured to launch the flying submarine out of the water environment and into the air environment.
21. The flying submarine according to claim 20, wherein the rocket propulsion system is configured to exhaust propulsive matter through the tube without substantially interfering with, or impinging on, the propeller.
22. The flying submarine according to claim 20, wherein the rocket propulsion system comprises:
- at least one water storage tank coupled to the rocket propulsion system exhaust tube and configured to store water; and
- at least one solid fuel hot gas generator combined with the at least one water storage tank, and wherein the at least one solid fuel hot gas generator is configured to burn solid fuel to create pressurized gas, wherein the pressurized gas forcibly expels water stored within the at least one water storage tank out of the rocket propulsion system exhaust tube, thereby providing the exhaust propulsive matter from the rocket propulsion system to propel the flying submarine.
23. The flying submarine according to claim 20, wherein the rocket propulsion system comprises:
- at least one water storage tank coupled to the rocket propulsion system exhaust tube and configured to store water;
- at least one high pressure storage tank coupled to the at least one water storage tank and configured to store pressurized gas; and
- at least one solid fuel hot gas generator configured to burn solid fuel to create pressurized gas, wherein the pressurized gas is stored in the at least one high pressure storage tank, and wherein the at least one high pressure gas storage tank is further configured to release the hot pressurized gas into the at least one water storage tank to forcibly expel water stored within the at least one water storage tank out of the rocket propulsion system exhaust tube, thereby providing the exhaust propulsive matter from the rocket propulsion system to propel the flying submarine.
24. The flying submarine according to claim 23, wherein the at least one solid fuel hot gas generator is further configured to burn a plurality of solid fuel cells to create a high pressure gas a plurality of times.
25. The flying submarine according to claim 24, wherein, for each burn of a solid fuel cell, the high pressure gas is stored in the at least one high pressure storage tank.
26. The flying submarine according to claim 20, wherein the rocket propulsion system comprises:
- at least one compressor configured to compress air; and
- at least one compressed air storage tank configured to store compressed air, and wherein the least one compressed air storage tank is further configured to release the compressed air into the at least one water storage tank to forcibly expel water stored within the at least one water storage tank out of the rocket propulsion system exhaust tube, thereby providing the exhaust propulsive matter from the rocket propulsion system to propel the flying submarine.
27. The flying submarine according to claim 26, further comprising: a snorkel connected to the at least one compressor, and wherein the at least one compressor is further configured to replenish compressed air within the at least one compressed air storage tank via the snorkel.
28. The flying submarine according to claim 27, wherein air is replenished within the at least one compressed air storage tank while the flying submarine is under water or in the air.
29. The flying submarine according to claim 20, further comprising:
- at least one a hydrogen storage tank;
- at least one oxygen storage tank;
- at least one electrolysis converter, wherein the at least one electrolysis converter is configured to (i) convert water into oxygen and hydrogen through an electrolysis process, (ii) store the oxygen in the at least one oxygen storage tank, and (iii) store the hydrogen in the at least one hydrogen storage tank; and
- at least one high pressure steam storage tank that includes a burner, wherein the at least one high pressure steam storage tank is configured to mix and burn the stored hydrogen and oxygen and produce high pressure steam, and wherein the at least one high pressure steam storage tank is further configured to release the high pressure steam into the at least one water storage tank to forcibly expel water stored within the at least one water storage tank out of the rocket propulsion system exhaust tube, thereby providing the exhaust propulsive matter from the rocket propulsion system to propel the flying submarine.
30. The flying submarine according to claim 20, further comprising:
- at least one hydrogen and oxygen storage tank;
- at least one electrolysis converter, wherein the at least one electrolysis converter is configured to (i) convert water into oxygen and hydrogen, and (ii) store the oxygen and the hydrogen in the at least one hydrogen and oxygen storage tank; and
- at least one high pressure steam storage tank that includes a burner, wherein the at least one high pressure steam storage tank is configured to burn the stored hydrogen and oxygen and produce high pressure steam, and wherein the at least one high pressure steam storage tank is further configured to release the high pressure steam into the at least one water storage tank to forcibly expel water stored within the at least one water storage tank out of the rocket propulsion system exhaust tube, thereby providing the exhaust propulsive matter from the rocket propulsion system to propel the flying submarine.
31. The flying submarine according to claim 20, further comprising:
- at least one water storage tank;
- at least one electrolysis converter configured to convert some of the water stored in the water storage tank into oxygen and hydrogen, and to store the oxygen and the hydrogen in the at least one water storage tank; and
- at least one igniter, wherein the at least one igniter is configured to ignite the stored hydrogen and oxygen and produce high pressure steam within the water storage tank, thereby forcibly expelling water remaining within the at least one water storage tank out of the rocket propulsion system exhaust tube, thereby providing the exhaust propulsive matter from the rocket propulsion system to propel the flying submarine.
32. The flying submarine according to claim 1, further comprising a water storage tank configured to provide ballast for the flying submarine.
33. The flying submarine according to claim 1, further comprising:
- at least one electrical storage battery; and
- an electrical power system including at least one solar photovoltaic cell mounted on a top side of the at least one wing structure, and wherein the electrical power system is further configured to recharge the at least one electrical storage battery during at least one of (i) the flying submarine being disposed just below a surface of the water, and (ii) the flying submarine cruising just below the surface of the water.
34. The flying submarine according to claim 1, further comprising a hydro-spike disposed at a nose of the body structure and configured to enter the water before the nose of the flying submarine as the flying submarine enters into the water environment to minimize impact loads on the nose of the flying submarine, wherein, prior to entering the water environment, the flying submarine is configured to fly at an altitude below about 100 feet and while at an airspeed just above a stalling speed of the flying submarine, wherein the flying submarine is further configured to reduce its speed to just below its stalling speed, and wherein the flying submarine is further configured to enter the water nose first and at an angle of between about 40° and 90° with respect to a surface of the water environment.
35. The flying submarine according to claim 34, wherein, when the flying submarine enters the water environment, the at least one wing structure, the at least one vertical stabilizer structure, and the at least one horizontal stabilizer structure fold into a water entry configuration.
36. The flying submarine according to claim 34, wherein the hydro-spike is further configured to move outwardly from the nose of the flying submarine.
37. The flying submarine according to claim 34, wherein the hydro-spike comprises:
- a shaft; and
- a water deflecting surface attached to an extendible end of the hydro-spike shaft.
38. The flying submarine according to claim 34, wherein the hydro-spike is further configured to break a surface of the water environment, and is further configured to mix the water with air to lessen an impact of a nose of the flying submarine into the water environment.
39. The flying submarine according to claim 1, wherein the at least one wing structure is configured to move between (i) a storage position, (ii) an airborne flight position, (iii) an underwater ascending position, (iv) an underwater descending position, (v) an underwater neutral-depth position, (vi) a water environment entry position, and (vii) a water exiting position.
40. The flying submarine according to claim 39, wherein the underwater ascending position comprises:
- a partially or fully extended at least one wing structure; and
- an inverted flying submarine, such that when the flying submarine is inverted, a lift vector of the partially or fully extended at least one wing structure is configured to push downwards the inverted flying submarine, thereby acting opposite to an upward buoyancy condition of the flying submarine, whereby the flying submarine is configured to glide upwards within the water environment.
41. A method for operating a flying submarine, comprising:
- providing a rocket propulsion system to cause exhaust propulsive matter from the rocket propulsion system to propel the flying submarine;
- flooding a ballast tank with water;
- placing the flying submarine at an appropriate water exiting depth;
- accelerating the flying submarine to about a maximum forward velocity with a propeller propulsion system;
- placing the flying submarine at a water exit angle;
- firing the rocket propulsion system at or just below a water-air interface, thereby providing an exhaust propulsive matter from the rocket propulsion system and propelling the flying submarine to a water exit velocity;
- unfolding one or more wing structures on the flying submarine to a flying position just at or above the water-air interface; and
- reversing the propeller propulsion system to operate the propeller in an airborne mode.
42. The method according to claim 41, wherein the step of providing a rocket propulsion system includes the step of providing a compressed air rocket propulsion system.
43. The method according to claim 41, wherein the step of providing a rocket propulsion system includes the step of providing an electrolysis air rocket propulsion system.
44. The method according to claim 41, wherein the step of providing a rocket propulsion system includes the step of providing a solid fuel air rocket propulsion system.
Type: Application
Filed: Jun 15, 2009
Publication Date: Sep 22, 2011
Applicant: AURORA FLIGHT SCIENCES CORPORATION (Manassas, VA)
Inventor: ROBERT PARKS (San Jose, CA)
Application Number: 12/484,557
International Classification: B63G 8/00 (20060101); B63G 8/08 (20060101);