Hi all! I did a scratch build job on a I-153 biplane and am having the following problems!

At take off the model will sway to the left (looking from behind) I have 4 degrees of right thrust and 2 down thrust. No mater what corrections I give it it will go in to a left banking turn and end up on its back or nose if I persist with the take off.

After checking for wing twists and etch I could not find anything.

Specs are!

wing span 72.5 inch (top wing)
weight is at 13 lbs
Power source is a G-26 Used 16x8 prop up to 18x8 (smaller was better).
Top wing is a + 2 degrees bottom is 0.0 VS is -1.0

Did try to change the top to 0.0 but nothing did change.

CG is at 15% based on the Tail volume calculations.

I have tried to take off 2 times and after a 2nd rebuild (Minor damage to the top wing) I am not considering to to rebuild this model. (Pity as it looks great)

Any one have any tips and comments on this type of phenomenon I would greatly appreciate it!

Kindly Regards

Kaptain_YAK.