ORIGINAL: rcmaster-RCU
I am building a 40 sized dazzeler for electric and I want to run one of great planes's rim fire out runner motors. The two I am looking at are the 42-60-480 and the 42-60-600. Which one would you reccommend as well as the battery and prop combo to generate the most thrust. According to the motor's website the 480 will swing a bigger prop but is recommended for a 5.5lb 3d plane. The 600 swings smaller props but will fly a 6.9lb 3d plane. I think there is some trick in understanding RPM/V ratings in accordance with prop size in order to get the best performance too right?
Appreciate the advice,
Alex.
Its fairly hard to reply to this with any scientific exactness. In order to determine a motor's performance, you need three things. Kv, Idle Amps and Resistance (Io). The motors as shown on the website do not give a resistance number. My guess is that the rimfires are typical mass produced Chinese motors which are on the mid spectrum of performance compared to other outrunners. Still, I am sure they would work.
The next question would be what battery you are going to use? Actually that is the most important question because the battery limits the maximum current and voltage you have to work with. this sets the maximum watts or power you can supply to the motor. (Voltage times Amps equals Watts) Once I know that I can give you a better answer. I will need the battery capacity, the cell count, the c rating and the manufacturer.