Before I installed them, I weighed one of each motor:
The Angel 2208 2600KV on a scale, showing 44.8g
Here's the EMAX Motor:
The EMAX 2204 2300KV on a scale, showing 26.5g
(Yes that is an old scale, but I prefer a true laboratory balance over a cheap digital spring scale.)
Note that I have to include the collet on the Angel's to make it fair. In both cases, I am showing everything needed to attach the prop.
So that is 18.3g less, per motor, or 73.2g less for 4 -- Almost a 15% weight reduction for the quad.
Weight, not advertised thrust, is really important for a small 250 size quad. I am never going to get near the peak of the efficiency curve for either motor when I am limited to 5" props, and smaller batteries. (More about the props later.) Weight savings, however -- on a small supposedly manoeuvrable racing quad -- is golden.
Next came installation:
The 2 motors have exactly the same mounting holes -- Size, orientation, and spacing, so mechanical...Continue Reading