I get it when maidening a new plane. Its the take off and the first few seconds of flight. Last nite, I maidened a Sig Kougar.
I had got this for $20 off of ebay. Servos and all. Although, they were Airtronics old style and I re-did the ends. Re-covered the wing,
painted the fuse etc. Got out my nifty CG program and input the numbers. Turns out the CG was right about at the 4 inch mark.
I put in an Evo .46 (a scary engine all itself!!!). To my delight, the damn thing took off and flew. It flew fine after a few clicks of down elevator and right aileron. Past month, felt the same way maidening my Pete 'n Poke and Seagull Spacewalker 2.

Dave...