FYI guys, this fuel model is quite realistic. Spits and 109's were known to have little range, only staying in the air for around 30 minutes.
And with my P-51D and KI-61, I get at least an hour's worth of fuel after I've climbed to about 15,000 feet. This is with drop tanks, though.
And I love not seeing so many LA7's and Spit IX's in the air these days. It's refreshing to see 109's and 190's, along with some 47's. I even see plenty of KI-61's at high altitude.
And, yeah, I like the E6B function. Now when I'm flying over an airfield before a goon arrives, I set my plane's power to cruise, and I get a lot of extra flight time. The cheese seems to be leaving

.