@darnold & terryo7,
I based my post about thin air purly from reading posts from the usa about people living at altitude, and the videos from the usa, and everyone seems to get a dip at launch, I myself living in rochdale(6 miles from oldham) never get a dip at launch ,always a steady clime out into wind, of cource with the torque roll but that is a gradual effect and easeyly corrected.
I am basicaly a slope flyer and don't fly power/electric very often so I am a novice to power/electric, just trying to help with my comments for others to think about. I launch at full throttle by the way as less doesn't seem to want to pull the plane out of my hand which is what you want for a succesfull launch, providing your trims are set right.
I am always on the lookout for advice and tips on flight skills and plane mods.
@ terryo7,
definately pilot error
(lack of experience)
afpe45.