12-Foot Low Speed Tunnel Models N-Z

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[top] NCSU Senior Project Model

[top] Oscillation

[top] Publicity Photos

[top] Ram Air Inflated Parawing

[top] Raven Blimp

[top] Reentry Vehicles

[top] Republic XP-41

The Republic (Seversky) XP-41 was a fighter aircraft built in the United States in 1939. A single prototype was modified from the last production Seversky P-35 by adding a new streamlined canopy, a Wright R-1830-19 engine with a two-speed supercharger, and revised landing gear. XP-41 first flew in March 1939. The aircraft was developed in parallel with the P-43 Lancer, and work was stopped when the USAAC showed a preference for the latter.

[top] Rocket Motors

[top] Rutan Models

Rutan has left an aircraft design legacy from 45 years of work, designing aircraft that are often quite dissimilar from their predecessors. "His airplanes and spacecraft take on all types of sleek shapes and sizes, looking more like the work of a sculptor than an engineer. In all, Rutan has come up with 367 individual concepts — of which 45 have flown."

Elbert Leander "Burt" Rutan (born June 17, 1943) is an American aerospace engineer noted for his originality in designing light, strong, unusual-looking, energy-efficient aircraft. He is famous for his design of the record-breaking Voyager, which was the first plane to fly around the world without stopping or refueling, and the sub-orbital spaceplane SpaceShipOne, which won the Ansari X-Prize in 2004 for becoming the first privately funded spacecraft to enter the realm of space twice within a two week period. He has five aircraft on display in the National Air and Space Museum: SpaceShipOne, the Virgin Atlantic GlobalFlyer, Voyager, Quickie, and the VariEze. YouTube Video

[top] Ryan Flex-Wing

[top] Ryan YO-51

These photos are quite similar to the Ryan XO-51 S.T.O.L. observation aircraft. They have tentatively been identified as such.

[top] SBIX-1 Airplane Model

[top] SBN-1 Airplane

Testing a 1/12th scale model of SBN-1 in the 12-Foot Free-Flight Tunnel: The 12-foot free-flight wind tunnel was constructed in 1939 to assist researchers studying the problems of stability and control. The desire was to allow researchers to "fly" dynamic scale models within the controlled conditions of a wind tunnel. The model's controls responded to remote control inputs from the operator.

[top] SCIF-II Model

[top] Scooter

[top] Space Shuttle Model

The Space Shuttle is a reusable launch system and orbital spacecraft operated by the U.S. National Aeronautics and Space Administration (NASA) for human spaceflight missions. The system combines rocket launch, orbital spacecraft, and re-entry spaceplane with modular add-ons. The first of four orbital test flights occurred in 1981 leading to operational flights beginning in 1982, all launched from the Kennedy Space Center, Florida. The system is scheduled to be retired from service in 2011 after 135 launches. Major missions have included launching numerous satellites and interplanetary probes, conducting space science experiments, and servicing and construction of space stations. Five space-worthy orbiters were built—two were destroyed in accidents and two have been retired, leaving one currently in service.

YouTube Video (Launch)

YouTube Video (Landing)

[top] Tailless Model

[top] Thrush Model

[top] Thrust Vectoring Configuration

[top] Twin-Boom Fighter Model

[top] V-173 Model

The Vought V-173 "Flying Pancake" designed by Charles H. Zimmerman was an American experimental test aircraft built as part of the Vought XF5U "Flying Flapjack" World War II United States Navy fighter aircraft program.

Both aircraft featured an unorthodox "all-wing" design consisting of a flat, somewhat disk-shaped body (hence its name) serving as the lifting surface. Two piston engines buried in the body drove propellers located on the leading edge at the wingtips. YouTube Video

1940-11-5 Vought Sikorsky V-173 MNACA 22279.jpg1941-01-25 V-173 ModelNACA 22826.jpg

[top] VTOL Models

VTOL is an acronym for vertical take-off and landing aircraft. This classification includes fixed-wing aircraft that can hover, take off and land vertically as well as helicopters and other aircraft with powered rotors, such as tiltrotors.

Interview with M. W. Nixon

[top] X-13

The Ryan X-13 Vertijet (company designation Model 69) was an experimental Vertical Take-Off and Landing aircraft flown in the United States in the 1950s. The main objective of the project was to demonstrate the ability of a pure jet to vertically takeoff, hover, transition to horizontal forward flight, and vertically land. YouTube Video

[top] X-31 Scale Model

The collaborative U.S.-German Rockwell-Messerschmitt-Bölkow-Blohm X-31 Enhanced Fighter Maneuverability program was designed to test fighter thrust vectoring technology. Thrust vectoring allows the X-31 to fly in a direction other than where the nose is pointing, resulting in significantly more maneuverability than most conventional fighters. An advanced flight control system provides controlled flight at high angles of attack where conventional aircraft would stall. YouTube Video

[top] XF4F-3

1942-04-22 Model Grumman XF4F-3, was tests number 25 and 26 to study wing-loading. The intermediate step between the biplane XF4F-1 and the first production version the F4F-3, the XF4F-2, was tested in Full-Scale Tunnel between 1936 and 1938 ( Test 92). A test video of a XF4F-3 is also available.

[top] XF4U-1

The Chance Vought F4U Corsair was a carrier-capable fighter aircraft that saw service primarily in World War II and the Korean War. Demand for the aircraft soon overwhelmed Vought's manufacturing capability, resulting in production by Goodyear and Brewster: Goodyear-built Corsairs were designated FG and Brewster-built aircraft F3A. From the first prototype delivery to the U.S. Navy in 1940, to final delivery in 1953 to the French, 12,571 F4U Corsairs were manufactured by Vought, in 16 separate models, in the longest production run of any piston-engined fighter in U.S. history (1942–1953).

The Corsair served in the U.S. Navy, U.S. Marines, Fleet Air Arm and the Royal New Zealand Air Force, as well as the French Navy Aeronavale and other, smaller, air forces until the 1960s. It quickly became the most capable carrier-based fighter-bomber of World War II. Some Japanese pilots regarded it as the most formidable American fighter of World War II, and the U.S. Navy counted an 11:1 kill ratio with the F4U Corsair. YouTube Video

[top] XF-8U

The Vought XF8U-3 Crusader III was an aircraft developed by Chance Vought as a successor to the successful F-8 Crusader program and as a competitor to the F-4 Phantom II. The F-4 Phantom II defeated the Vought XF8U-3 Crusader III. Though based in spirit on the F8U-1 and F8U-2, and sharing the older aircraft's designation in the old Navy system, the two aircraft shared few parts. YouTube Video

[top] XFV-12A

The Rockwell XFV-12A was a prototype supersonic United States Navy fighter which was first built in 1977. The XFV-12 combined the Mach 2 speed and AIM-7 Sparrow armament of the F-4 Phantom II in a VTOL (vertical takeoff and landing) fighter for the small Sea Control Ship which was under study at the time. On paper, it looked superior to the subsonic Hawker Siddeley Harrier attack fighter. However, it proved unable to produce enough thrust for vertical flight, even with an installed engine with more thrust than its empty weight, and the project was abandoned.

See also, building 645 and building 643 for additional tests.

[top] XP-88 / XF-88

The McDonnell XF-88 Voodoo was a long-range, twin-engine jet fighter aircraft designed for the United States Air Force. Although it never entered service, its design was adapted for the subsequent F-101 Voodoo. (The XP-88's name was later changed to the XF-88.) The initial design called for straight wings and a V-tail, but wind tunnel tests led to changing the design to swept-back wings and a conventional tail.


Stability and Control Tests of a McDonnell XP-88 Model

The XF-88B Propeller Flight Research Program

The prototype of this aircraft was developed in the 1950s. The McDonnell XF-88B with a nose-mounted Allison T38 turboprop engine and two turbojets spent most of its flight time at NACA Langley. Flight testing on this model began in 1953 and continued through 1956 when these photos were taken. This model was the first propeller-equipped aircraft to exceed Mach 1.0. (S/N 46-525)

[top] XV-5A

The Ryan XV-5 Vertifan was a jet-powered V/STOL experimental aircraft in the 1960s. The U.S. Army commissioned the Ryan VZ-11RY (which was redesignated as the XV-5 in 1962) in 1961, along with the Lockheed VZ-10 Hummingbird (redesignated as the XV-4).

The XV-5 drove three fans. Engine gases from two 3,000 lbf (13 kN) thrust J85 turbojets, similar to those used in the F-5 Freedom Fighter were sent to exit by turning fans. It was much simpler in concept, if not execution, compared to the future F-35 Lightning II which has one fan driven by a driveshaft, balanced by a rotating rear nozzle. There was a large fan in each wing with covers resembling half-garbage can lids which flipped up for vertical flight. The 36 inch (0.9 m) nose fan provided adequate pitch control, but made flying tricky. The fans provided vertical thrust of 16,000 pounds force (71 kN), nearly three times the thrust of the engines alone. YouTube Video

[top] YF-16

The General Dynamics F-16 Fighting Falcon is a multirole jet fighter aircraft originally developed by General Dynamics for the United States Air Force (USAF). Designed as a lightweight day fighter, it evolved into a successful all-weather multirole aircraft. Over 4,400 aircraft have been built since production was approved in 1976. Though no longer being purchased by the U.S. Air Force, improved versions are still being built for export customers. In 1993, General Dynamics sold its aircraft manufacturing business to the Lockheed Corporation, which in turn became part of Lockheed Martin after a 1995 merger with Martin Marietta.

The Fighting Falcon is a dogfighter with numerous innovations including a frameless bubble canopy for better visibility, side-mounted control stick to ease control while maneuvering, a seat reclined 30 degrees to reduce the effect of g-forces on the pilot, and the first use of a relaxed static stability/fly-by-wire flight control system that makes it a highly nimble aircraft. The F-16 has an internal M61 Vulcan cannon and has 11 hardpoints for mounting weapons, and other mission equipment. Although the F-16's official name is "Fighting Falcon", it is known to its pilots as the "Viper", due to it resembling a viper snake and after the Battlestar Galactica Colonial Viper starfighter. YouTube Video

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