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.
A kind of vertical test fixture for firing test of high thrust and short time motor with fore nozzles was designed. Its dynamic characteristics are analyzed and satisfactory results are obtained.
Compared to single piston cylinder, it features fast action and flexibility, specially used when large thrust force or tensile force is required within short time.