Aha, that's more like it. Took the Mk I up and around and landed her again, parked her up, switched the engine off...and then the radiator broke.
So that's that niggle box ticked.
Still having framerate problems over land though...could be my Catalyst version. What version are you guys using? What in-game settings do you have? Any chance of some screenshots of the graphics settings section?
And Hunter...yes...the Blennie is a swine to start up isn't it? Had a few problems with the 109 myself, turns out the handbrake seemed to be on, and then I wobbled too much after take-off and crash landed again.