Neewer® A2212/13 KV1000 Brushless Motor Hex Rotor Multi-copter and RC Aircraft
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*Apply to the NiCD / NiMH: 6 - 9S. *Apply to the Propeller: 8x4.5" 9x4.5" 10x4.5" 10x4.7". *Apply to the three Propeller: 7x4.5" 8x4.5" 9x4.5". *Shaft diameter: 3.175mm. *Weight: 2.20oz package content: 1x Neewer® Brushless Motor A2212/13 KV1000
Top Customer Reviews
The prop adapters on the other hand are engineered to fail. The compression sleeve has no room to compress the clamp around the motor shaft.
You can resolve this by ordering http://www.amazon.com/gp/product/B00AQBU1WA where the compression sleeve leaves around 20% and allows the prop nut to tighten to the motor shaft as it should.
YOUR PROPELLERS MAY FLY OFF THE MOTOR SHAFT UNLESS YOU LOOK INTO THIS OR TIGHTEN THEM SO MUCH YOU COMPRESS THE PLASTIC OF THE PROP.
BALANCE YOUR PROPS!
EDIT: So I after flying with these a while I took them off and replaced all of them for new ones of a different brand. After much adjusting, swapping out, reinstalling, and just all around frustration I found that one of the motors was not putting out the rpms and torque under load as the other three. So much so that I couldn't get the ESC/ to compensate. Which is kind'a of a fatal problem on a quad. That said they're perfect for a car or boat, maybe even a small helicopter, anything with only one or two motors. But if your looking to put them on a quad these may not be the best solution.
For the money, these guys are great. You can get them for $15 or less, great thrust on 9 or 10 inch rotors on 3S. Can't run 4S.
When you order them, make sure you have spares. The prop adapter tends to fly off causing a crash. I'd also suggest upgrading prop adapters to prevent this, http://www.amazon.com/gp/product/B008RFLJO6/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 are pretty good.
I won the competition and ended up converting the boat to RC. The motors now have many hours running submerged and are still running great despite not being designed for this purpose. They have tons of torque and the boat literally leaps out of the water if full throttle is applied. I'm sure they won't last forever running underwater (they aren't meant to!) but if they work in my application, they should be great for their intended purpose of running planes and quad copters.