thanks for the replies

i am using a cooking scale which my girlfriend using for cooking so it has some error for sure but it shows right under 12 ounce

i m using hobbicos 1/2A fuel that is 25% and the prop is Cox 6x3 Nylon Propeller. i really think that i didnt have enough power for that airplane. is it possible that i messed the engine up during the break in and it is not running well now??

would a texaco .049 or black widow .049 be too much. or how is the norvel .049 c/l engine??