This is by way of a 'workaround' guide to the current problems with both overheating and energy loss in the RAF Fighters with the current v1.08 Patch.
Setting Radiator at 50%, and RPM to 2650 as soon as you've achieved 185mph after take off will keep temps under control without causing too much drag from the radiator shutter.There's some more advice right at the end of the clip. I didn't upload at high res, but you'll get the gist. This was recorded last night on ATAG server 1. I think I got on Klem's nerves a bit, buzzing around and disturbing their squad take-off. Sorry Klem
Edit: The 50% radiator setting and 2400-2600rpm setting will benefit all the RAF Fighters with csp currently modelled.
The two-pitch prop models will also benefit from a cleaner airframe by keeping the radiator set at 50%, but watch temps if in fine pitch at 3000rpm. Throttle back and change to coarse pitch rather than increasing rad above 50%.
Airspeed has an important role to play also. If you slow down, you get hot. Speed up again and you cool down.