Oh yes - that I-16 is a beast to fly. WEP can only be sustained for a very tiny amount of time, much less than any other plane in this (wonderful) game.
The engine died 5 or 6 times during that one mission, but it was a pleasure to emergency land as this plane would not flip over during landings. When diving down while pulling the throttle back and pushing it to 100% again, I even managed to get the engine on again, but somehow it must have been disconnected from the prop. I definitely heard engine sounds again but it stopped turning once I pulled up from my dive.