F-35B First STOVL Engagement

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The Lockheed Martin F-35B Lightning II stealth fighter engaged its short takeoff/vertical landing propulsion system in flight for the first time, near Naval Air Station Patuxent River, Md., on Jan. 7. The flight was the first in a series that will culminate in a hover and vertical landing. On this flight the F-35 climbed to 5,000 feet and engaged the shaft-driven lift fan propulsion system at 210 knots (288 mph), then slowed to 180 knots (207 mph) with the system engaged before accelerating to 210 knots and converting back to conventional-flight mode. The STOVL propulsion system was engaged for a total of 14 minutes during the flight. The second STOVL mode flight occurred two days later, Saturday, 9 January. Flight duration for this event was one hour with the STOVL propulsion system engaged for 26 minutes. The flight profile was similar to the first flight but included deceleration to 150 knots to complete handling qualities test points. F-35 Lead STOVL Pilot Graham Tomlinson said afterward that the aircraft flew smoothly with the STOVL system engaged and was very easy to control.

The F-35B STOVL aircraft is powered by a Pratt & Whitney F135 engine and a Rolls-Royce lift fan, which can be seen in the video just behind the cockpit. The system also includes a unique articulating exhaust nozzle known as a three-bearing swivel duct that vectors engine thrust, as well as under-wing roll ducts that provide lateral stability.

Category:

Science & Technology

Tags:

• F-35
• Lockheed
• STOVL
• fighter
• Lockheed Martin
• JSF

[LockheedMartinVideos]

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[Guitammer]

Weird - why is the landing gear down?

[MuckupAgain]

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