maybe not for jet fighters ? ... they are all fly by wire and
aerodynamically unstable … if the control goes, they are gong to
drop like a brick …. 
I’m not worried too much about the shooting scores of our pilots
… with helmet mounted sights and off bore-sight missiles, they’d
just have to look at a plane to shoot it down …
All fly-by-wire aircraft (commercial and military) are
required to have sources of backup electrical power to operate the
control surfaces and essential avionics in the event of complete
engine failure. Backup power is usually provided in the form of
batteries or (in the case of most commercial airliners) a ram-air
turbine that automatically deploys into the airstream to generate
electricity via a wind-driven generator.
Fighters may be designed aerodynamically unstable for
maximum maneuverability, but they still have to
be capable of stable flight
at idle or near-idle power settings, such as when it is on final
approach.
