Okay, first forgive me for not searching these forums (for hours) trying to find my answers.

My question is simple (I think). How do you figure out this mix of electric motor, battery source, ESC and propeller to get what you want?

My goal is to put together a propeller with a brushless outrunner motor to make 30+ oz's of thrust. I look at motors, props, etc., but none of these sites seem to pull it all together and tell me what I need to know to make the right combo. It seems that it is easy to overload a motor by putting on too much prop or under-rating the ESC and/or battery.

I have a TP1500 and a TP1320, so to start I would like to use these batteries if I can. I am building an Ultrafly Extra 300, which I see by reviews is sorely underpowered. The optional motor Ultrafly offers to go with the gearbox also are reported to be weak. The plane promises to weigh in at 22 oz's, so I figure I should shoot for 30 oz's minimum thrust to get decent vertical performance.

I have an AXI 2208/34 running on a Jeti 8 Amp with the TP1320, but that is said to only turn out 17 oz's thrust with the 10x3.8. So, is there some magic formula to compute all this into simple terms to spec a proper system?

Please help... [sm=rolleyes.gif]

Thanks in advance...