I never had a Demon, but typically combat models of that era used Veco T21D's, which were 4 oz, 1" high 'square wedge' tanks. For your .29 on suck, it shouldn't need more than 3.5 oz for sport flying. When building a tank into the wing like that, I highly recommend soldering a washer onto the joint where each tube pierces the tank hull. It will prevent leaks
and make your model last longer.
Steve
Topic: Demon (Read 949 times)