Er... the RV8 isn't part of the game, really. It was a test device. Hitech owns a real RV8. By comparing the real thing with the virtual thing, they could see if it was behaving properly (or if they realized they needed to tweak lift flow or whatever).
They only "enabled" it after a con where it was unveiled. It's not a real plane in the game, and any field it's enabled at is a bug. It should not be enabled in any online arena unless Hitech or somebody at HTC enables it for a short period of time (for fun).