Thanks for the help. I was planning on using a 20oz fuel tank. That would make for around 2.5lbs of fuel. The 26cc engine weighs 2.5lbs. That would only leave me 5-7lbs for the airframe, radio gear, and batteries. Being that this is my first gas engine and I understand that you get much longer run times off of gas would it be worth the weight savings to go to a 10oz fuel tank or would that make my run time to short?

LOVEBIPES I respect that thought and I'm sure that it would be a great flying plane with a 1.60 glow engine but I am already spending $50 a week on nitro and am only flying two .75 engines, not to mention that the cleanup is a pain. I would imaging that 20oz of nitro would only last around 10 min. with that big engine. I try to fly every day before and after work for about an hour. I don't think I can afford that much fuel.