Those "turret fighters" were basically total failures. At least one of the British attempts wound up being used for anti-aircraft defense, parked on the side of

Those "turret fighters" were basically total failures. At least one of the British attempts wound up being used for anti-aircraft defense, parked on the side of the runway after having their engines removed. The Northrop P-61 had a turret, which wound up being used in the locked forward position due to it being unreliable.