4K
Lockheed Martin X-35B STOVL demonstrator prototype, the landmark concept demonstrator that led to the F-35B Lightning II.
© Raid_nations02
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Spotter's notes
This is the only X-35B ever built. It is displayed next to a test engine and other historic military aircraft.
Aircraft identity
ICAO Type
X-35B
Model
X-35B
Manufacturer
Lockheed Martin
Livery
Prototypical X-35B test livery with STOVL tail markings
Military
Military
Technicals
Engine
Pratt & Whitney YF119-PW-611
Thrust
Rated 40,000 lbf (178 kN) class with afterburner
Wingspan
10.7 meters
Length
15.7 meters
Height
5.2 meters
MTOW
22,200 kilograms
Range
900 kilometers (combat radius, STOVL configuration)
Capacity
Single pilot
Cruise Speed
1,060 kilometers per hour
Noise Rating
Not officially rated (prototype); modern STOVL jets typically exceed 120 decibels, ICAO Chapter 4