Velco, don't forget that Neu motor is an inrunner, and we are comparing it to outrunners. I don't know enough about this stuff to make an accurate comparison, but I know enough that the motor should work with the right prop.

Within the Neu motor selection, I don't know how to decide if the 1912, 1915, or 1917 is the right choice for our application. I liked the 1915 at first because the length is very close to the Hacker - I was thinking we could still use the rear support. Then I realized it's an inrunner and probably doesn't need or have a rear support to begin with.

The Neu specs don't give a max amperage. If using one given battery with a given C limit, isn't there only so much power (Watts=Amps*Volts) you can get from the battery?

I don't know how the weight thing fits in here as the Scorpion 4025-16 is a few ounces lighter than the 4035-250, yet it can handle 15 more continuous amps, and thus deliver power within 200 watts of the 4035.

I obviously don't know much about this stuff. I like Neu because I know people competing with Neu motors (although the F3A inrunner models). Hacker has a great reputation and also is widely used, but the motor selection for this plane seems underpowered compared to the other options. Scorpion is new to me and I know no one running Scorpion motors which is why I'm still considering the Neu. So far the Scorpion is my 1st choice just because I have an idea what to expect.