A conventional takeoff and landing (CTOL) F-35A Lightning II aircraft reached a 50 degree limit on its high angle of attack (AOA) test flight conducted from Edwards Air Force Base.
F-35A test aircraft are limited to AOAs of 20 degrees until their controllability is proven at a higher AOA limit of 50 degrees.
Richard Clements for TheAviationist.com
Image credit: Lockheed Martin