Copa promising fighter F-35 Ligtning II is not able to withstand lightning strikes. This conclusion came Manage Operational Test and Evaluation (OT & E) of the Pentagon. Currently, aircraft are prohibited from making flights in areas where thunderstorms are more frequent. Aircraft is also prohibited to approach less than 40 km to such zones.
Also neobmyslennoy protection of avionics from lightning, fighter also received feeble generation system of inert gases (OBIGGS), responsible for filling vacated volume fuel tanks with inert gases and maintaining their small oxygen levels. In grozoopasnyh areas with constantly changing atmospheric pressure system may malfunction.
Maintaining a constant low level of oxygen in the fuel tanks need to prevent an explosion in the engine and tanks themselves in case of lightning. In addition, deficiencies OBIGGS and led to lowering the speed limit. Currently, this option is flying at least six thousand meters must not exceed 1.8 thousand meters per minute. In the unlikely event OBIGGS may also fail.
Following an audit of fighter F-35 OT & E has limited the flight characteristics of the aircraft. Now for deck version of the F-35 — C — slow overloading at steady reversal should not exceed 5g (previously 5,1 g). In addition, the time required to accelerate from 0.8 to 1.2 Mach number was increased to 43 seconds.
It is time for the ordinary version of F-35 — A — increased by eight seconds, and for a short takeoff and vertical landing — B — 16 seconds. Overload at steady turn for F-35A was reduced from 5,3 g to 4,6 g, and for the F-35B — from 5g up to 4,5 g.
The researchers also found problems with the horizontal tail F-35, suitable for all versions of the aircraft. At tremendous speeds or flight altitudes on the huge tail often experiences extreme changes in temperature; this leads to detachment of the coating, and in some cases may even lead to destruction of the elevators.
Fighters were also found deficiencies design, leading to excessive fluctuations rudders and flaperons during the transition from subsonic to supersonic flight and vice versa. In addition, the often stated sluchaibaftinga. Developers want to make configuration software to lower hinge moment elevators and flaperons flying at speeds border.
A complete list found on the F-35 problems and flaws can be found votchete OT & E. It is possible that the terms of readiness of all 3 versions of the F-35 can be displaced. At the end of the current time for the development of F-35A is expected in 2016, F-35B — in 2018, and F-35C — in 2017.