So my Flex RC 1102 15000KV Brushless Motors and other parts finally came in. Since a bunch of you guys were looking into brushless whoops (and some were particularly interested in these specific high KV motors), I thought I’d add my 2 cents, so you can decide whether or not to buy these motors. (If you do decide to buy, please click the link in the YouTube video to give me some cash for my addiction to this hobby!) (No link here though.)
Decent. A few of the windings were not perfectly wrapped around the stator. I’m probably just spoiled by my Emax 1106 motors. Haha!
Flex RC 1102 15000KV brushless motors (weight just a bit more than the 0705 motors, but with real bearings and more thrust!!!)
Eachine 1535 4-bladed props
Split (3S) to 1S 450 mAh 45C lipo
TinyFish FC + ESC Stack
Here’s the video:
I found that ducts barely increase the efficiency of the motors. They do decrease the Amp draw slightly. I do plan to do a quick test when my 1535 KingKong triblades arrive. I also plan to decrease the tip clearance from 1mm to 0.3mm to see if that has any effect, since I read that the added efficiency from a ducted prop decreases dramatically with increasing tip clearance.
I reran this test without video for a 2-bladed Eachine 1535 prop in the full duct, and I got 2 grams less thrust with 0.6 A less Amp draw. Maybe worth it?