I am building a 40 size flying boat, The engine is going to be about 6" above the fuse, coming out about 4' in front of the top wing. I made a Cad file, but did not realize its not supported on rcu, I was wondering how to figure out how much up thrust it should have or is it something I just have to try and fly and adjust accordingly? Thanks for any help.

Skater I am no expert but having built and flown several different types of pylon mounted tractor configurations, my reccomendation would be for around eight degrees positive.

John

You could save your CAD file as a PDF and post it here.