When pulling power matters and looks.. well.. just dont, then the HobbyKing Donkey ST3508 is the work horse for you. This tough-as-rawhide motor features a heavy duty mount, a 5mm shaft and self oiling bushings that just wont give up like some of the bearings in those little "Show Pony" motors.
Specs: RPM/v: 730kv Dimensions: 41 x 28mm Shaft: 5.0mm Voltage: 11.1v~14.8v Weight: 115g No-load current: 1.9A @ 11.1v Max Current: 35A Max Watts: 330W Mounting Holes: 51mm
I am building a giant 200% Magnum Reloaded - EPP-foam-slowflyer , wingspan 1,6meters , 1,2kg .
I would like to mount the largest possible airscrew on this motor using a 3S 2200mAh lipo .
The plane is meant fü*r real slow flying in no- or low wind conditions ...
... and the plane doesn´*t need much speed over ground ...
- >What do you think about a 14x4 or 15x4 APC-E on this motor with 3S ? ? ?
Is it worth testing it , or will I kill the motor ?
Thankyou for your help .
Greetings , Michael
This motor seems to be very good for low cost big tri - and quad helicopters due to its large diameter. The no load current at 10V is only 1,A. Even at 20V no load is only 1,6A. The measured winding resistance = 0,77ohm. It seems possible to get 500-600gr lift at 2S=7,4V with a 13*4 prop at 7A. This is close to 10gr / W. This motor can also be used up to 6S due to the low no load current for other purposes. My motor had to be balanced due to an inaccurate bell.
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I have been using this motor on a powered glider I build, with an 8 foot wing span (see uploaded video). I have flown the plane about a dozen times, usually with an 1170 prop (slowfly or std electric), with a 50 amp ESC and a 30c 4S battery. I have had no problems with the motor for this type of slow flying / heavy plane application. Note that the 5mm prop adapter has a threaded shaft exactly the size of the propeller hole. so, you cannot for example use a Master Air Screw folding prop without drilling it out. Also, you really have to tighten the collet adapter well or it will fly off.