View Full Version : Motor selection help.

11-28-2005, 11:48 PM
I scratch built a model with a 55 inch wingspan, weighing about 40oz. I have a Castle Creations Pheonix 25 speed controller. What motors would you suggest to fit this plane? I have a Himax 2015-4100, but I don't think it will be enough and I know it isn't coming close to pushing the limits of my esc.

11-28-2005, 11:54 PM
Is the 40oz what it weighs now without any gear?

11-29-2005, 03:23 AM
Well 40oz is a rough guess at what the maximum flying weight will be, So I guess consider the 40oz the total flying weight with the Himax motor installed.

11-29-2005, 10:07 PM
You may start with the power required depending on the type of plane and type of flying.
At least 60 Watts/lb for reasonable aerobatic capabilities.
Then you should have a motor prop combo that gives you a pitch speed of at least about 2.5 times the stall speed.
For the same power, the more pitch speed you get the less thrust you have, so it's a compromise depending on your priority.