Free Newsletter
Register for our Free Newsletters
Airport, Border and Port Safety and Security
Left Nav Sep
Left Nav Sep
Civil Aircraft
Left Nav Sep
Civil Airlines, Airports and Services
Left Nav Sep
Communications and Navigation
Left Nav Sep
Education, Training and Professional Services
Left Nav Sep
Manufacturing and Materials
Left Nav Sep
Military and Defence Facilities
Left Nav Sep
Military Aviation
Left Nav Sep
Military Vehicles
Left Nav Sep
Naval Systems
Left Nav Sep
Personal Equipment
Left Nav Sep
Software and IT Services
Left Nav Sep
Space and Satellite
Left Nav Sep
Weapons, Ammunition and Explosives
Left Nav Sep
View All
Other Carouselweb publications
Carousel Web
Defense File Logo
New Material Logo
Pro Health Service Zone
Pro Manufacturing Zone
Prosecurity Zone
Web Lec Logo
Pro Engineering Zone

Lockheed Martin F-35B exceeds STOVL thrust requirement

Strict Standards: Only variables should be passed by reference in /home/defensef/public_html/components/com_zone/handleHTML.php on line 623
Lockheed Martin
: 24 April, 2009  (New Product)
Hover-Pit ground tests talidate propulsion system and aircraft response
The first F-35B short takeoff/vertical landing stealth fighter operates in vertical-landing mode on a special 'hover pit' at Lockheed Martin in Fort Worth, Texas, during an April test. The aircraft's shaft-driven lift fan propulsion system produced more vertical thrust than needed to meet performance requirements.

The F-35B Lightning II short takeoff/vertical landing (STOVL) variant has demonstrated during testing that it produces excess vertical thrust - more than required to carry out its missions. The tests, conducted on a specially instrumented 'hover pit,' also validated the performance of aircraft software, controls, thermal management, STOVL-system hardware and other systems.

'The performance level measured was absolutely exceptional,' said J.D. McFarlan, Lockheed Martin F-35 Air Vehicle lead. 'We demonstrated 41,100 pounds of vertical thrust against our requirement of 40,550 pounds.This means we will deliver excellent margin for the vertical landing and short takeoff performance we've committed to our STOVL customers,' he said.

Those customers include the U.S. Marine Corps, the United Kingdom's Royal Navy and Royal Air Force, and the Italian Navy and Air Force.

The F-35B is powered by a single Pratt & Whitney F135 engine driving a Rolls-Royce lift fan. The F135 is the most powerful engine ever flown in a jet fighter.

During hover-pit testing, the aircraft is anchored to a metal grate 14 feet above a sloped concrete floor, separating the jet from ground effect and enabling it to simulate free-air flight. Sensors measure thrust and the aircraft's response to pilot inputs. The testing also demonstrates control of the doors associated with the STOVL propulsion system: engine auxiliary inlet, fan inlet, fan exit, roll posts, and doors that open to enable the Rolls-Royce three-bearing swivel duct to articulate and vector engine thrust. In other tests, metal plates are installed atop the hover-pit grate, enabling engineers to observe and chart the outflow of gases from the propulsion system.

The testing demonstrates functional operation of all systems required for vertical flight, and measures the installed forces and moments on the aircraft during STOVL operations.The hover-pit tests are the final series of ground tests before airborne STOVL testing begins.

'We've demonstrated critical performance such as inlet pressure recovery, pitching moment, rolling and yawing moment, effective vector angles of the exhaust, and control-input response time,' said Doug Pearson, vice president of the F-35 Integrated Test Force. 'Each of these measurements correlates extremely well with our computer models. The outstanding STOVL performance gives us plenty of confidence to begin in-flight transitions to STOVL-mode flight and ultimately our first vertical landing at the Naval Air Station Patuxent River, Md., this summer.'

The F-35B is the first aircraft to combine stealth with short takeoff/vertical landing (STOVL) capability and supersonic speed. The F-35 is a supersonic, multi-role, 5th generation stealth fighter. Three variants derived from a common design, developed together and using the same sustainment infrastructure worldwide, will replace at least 13 types of aircraft for 11 nations initially, making the Lightning II the most cost-effective fighter program in history.

Bookmark and Share
Home I Editor's Blog I News by Zone I News by Date I News by Category I Special Reports I Directory I Events I Advertise I Submit Your News I About Us I Guides
   © 2012
Netgains Logo