Hi Erik

Thank you.

As far as the F-15 I have flown it with a mw54 to a Simjet 3000.

If you want to fly it on a smaller motor I would say that 13 lbs is the minimum for flying. And it pretty much needs to be off of asphalt.

If you keep it light, taileron no external tanks P-80 17 lbs ok.

Really fun if you have 25 lbs.

Fully loaded with tanks and pylons use 27 lbs+. I would use 30 ~ 32 lbs as the upper limit.