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  Item found in the following categories;
> Electric Motors > Outrunners by size > 35 to 44mm

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HobbyKing Donkey ST3508-730kv Brushless Motor

HobbyKing Donkey ST3508-730kv Brushless Motor

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

Prop Data:
12x6 - 11.1v - 16A - 1060g Thrust
13X4 - 11.1v - 15A - 1140g Thrust
10x5 - 14.8v - 16A - 1180g Thrust



PRODUCT ID: ST3508-730

This product available from a warehouse near you!

Kv(rpm/v) 730
Weight (g) 115
Max Current(A) 35
Resistance(mh) 0
Max Voltage(V) 15
Power(W) 330
Shaft A (mm) 5
Length B (mm) 28
Diameter C (mm) 42
Can Length (mm) 18
Total Length E (mm) 44
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Customer Data

Weight: 162g Quantity: 
International Warehouse
stock
10+
USA West Warehouse In Stock View Item
Price $9.95

esc
  • Hobbyking SS Series 40-50A ESC (Opto only)

    Combo Price: $10.66   IN STOCK

  • H-KING 50A Fixed Wing Brushless Speed Controller

    Combo Price: $16.21   IN STOCK



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 Customer rated
417
crowns
  
 
Total of 37 discussions.
Alex  2 points - 7/12/2014
 
could someone please recommend a cheap bullet or prop saver for this motor?
 XXXTechRC 88 points
Hi Alex. It's a 5mm shaft so you'll need PRODUCT ID: JJ5.0 or GS0157 or GS0157M. They're all grub-screw type prop adapters. Hope this helps!
Painless Potter  21 points - 3/31/2014
 
Today I tested a APC 15x4 on 3s . Motor turned about 6050 1/min at 27 A and pulled 1200 gramms . Is this a good setup for in my big Magnum Reloaded , or should I use an other prop ? .
Painless Potter  21 points - 3/9/2014
 
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
foster  379 points - 3/9/2014
 
easy to build multi-roto frame that works great with this motor
alexkirlian  11 points - 2/1/2014
 
Que sistema de fixaç*ã*o ESQUISITO é* esse ??? Queria pegar pro meu quad, mas com esses pé*s, é* meio impossí*vel fixar !! E o pior é* que os caras nã*o postam mais fotos do motor !!! Fala sé*rio, HK, você*s estã*o querendo me enganar???
Customer Reviews
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Overall Rating
Anakgil
6 likes
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niceee motor and full powerr...


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Overall Rating
Ole
15 likes
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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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jdplus3
18 likes
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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.


3 comments. Reply..

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99FRC427
49 likes
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Did not come with anything other than the motor. Brittle mounting tabs also. Great power though


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Crankshaft_DE
23 likes
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Works very well with an 11x7 on the Hobbyking Spitfire. After the modification original setup makes the spit look like a sitting duck in memories...


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