On early LaGG-3 it is a red light on right of panel. See the Aircraft Guide.pdf in the main il-2 folder. This guide is more useful now since it has recommended combat and cruise RPM settings for many aircraft. LaGG-3 series 4 for example:

Hi Flanker,

I made you a Lagg video with information about the 4.11 patch and put it up here:

http://www.youtube.com/watch?v=5mBCd...ature=youtu.be

S!

It would be handy to have the operating temperature range for each aircraft as well. I don't see anything in the guide.

+1.