ORIGINAL: davej78
Ive been cutting down on fuel tank size, how many times do you fly all the way dry, I found it was very seldom and have been down sizing tanks since, e.g. on my 70 fs powered planes down to 10 oz from 14 thats a real big weight saving.
It always amazes me the size of tanks people use. With a 70 fs I would use 6-8oz. That should give you 12 minutes.