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> Electric Motors > Outrunners by size > 35 to 44mm

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HobbyKing Donkey ST3508-730kv Brushless Motor (US Warehouse)

HobbyKing Donkey ST3508-730kv Brushless Motor  (US Warehouse)

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

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 D (mm) 18
Total Length E (mm) 44
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Customer Data

Weight: 162g Quantity: 
International Warehouse In Stock View Item
stock
10+
Price$9.81


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 Customer rated
45
crowns
  
 
Total of 9 discussions.
saltyisildur  25 points - 3/22/2013
 
can this motor run on 6 s?
 M1cie 33 points
Not for long. I never try, but i won't try.
Joseph  2 points - 2/19/2013
 
It has "oilite" bushings. powdered bronze bearings infused with oil . When shaft spins, it creates heat, which releases oil from bearing. My opinion, Joe
les  2 points - 2/15/2013
 
self oiling is oilite brass ie brass bushings that are oilsoaked
stephen  1 points - 1/31/2013
 
when will these be back in stock? I have a project in the works and want to know if I should wait for them.
krashNburn  343 points - 12/24/2012
 
"self oiling bushings"??? How does that work?
 frostbit 208 points
****
Customer Reviews
Overall Rating
Dirt Torpedo
66 likes
Value
Quality
Like it?
Nice beefy motor for a very good price. Tested in a .40 size Eindecker type plane on 4S and 11x7 prop, adequate for scale flight, ran cool with no signs of heating. Moved to a small balsa low wing aerobat (Tiger 400 / Mini Pulse type) and it's a real champ. Its a little heavy but I needed nose weight so its perfect. It is ugly and crude but nobody sees it under the cowling! Can't attest to longevity since I've only flown it less than one hour but so far its smooth and quiet. Very impressive. Only gripe is does not come with a prop adapter


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Overall Rating
AirplaneDope
12 likes
Value
Quality
Like it?
I bought it for a 5' 5" twin boom slow flyer. ButIt definitely draws more than 16A with a 12x8 and a 3S. I was using an SS 25-30A ESC but it burned out the first time I tried to fly it. Definitely use at least a 35 or 40A ESC. But it seems pretty powerful, but 4 crowns so far


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Overall Rating
SandyGabby
21 likes
Value
Quality
Like it?
I found that this motor was fully capable as indicated in its description.
It is every bit as good as a Supre Tiger .10 that sells thru Tower Hobbies for 29.99.
The only problem that I found was a bit of imbalance. After about 30 minutes of tinkering, I had it balanced and running very smoothly with a Great Planes Slow Flyer 10 x 4.5 prop. It was pulling 18amps. Nice little motor for the price.


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Overall Rating
mpc2485
4 likes
Value
Quality
Like it?
All I can say is WOW! I bought this motor for a new quadcopter I built from scratch and, with a little work and forethought, they work unbelievably well. After I ordered these motors, I saw some YouTube videos in which people said not to use the Donkey series for multicopters because they vibrate too much. Based on that information, I used bonded neoprene washers between the motor mounts and the frame. This must have killed any vibration because they run as smooth as silk. One thing to note is that you need to order a 5mm-to-5mm prop adapter as the shaft on this motor is a thick 5mm. I personally had a little trouble getting my prop adapter to stay on the shaft, but it was nothing a Dremel tool and some thread locker couldn't fix. Thanks to the sturdy construction, it is almost impossible to bend the shaft or bell, and you would have a hard time breaking the mounts. Many of the motors I have used in the past just can not withstand multi-rotor crashes. With the Donkey motors, however, it is like the crash didn't even happen. Here is my configuration: - Donkey 730Kv - 30A ESC - 10X4.5 props (balanced by hand) - HobbyKing Multi-Rotor Control Board (KK Board) v2.1 This thing takes off like a rocket and flies like a jet and I have to believe that the Donkey's are a major factor. I am even confident enough in this set up to attempt loops and rolls the next time I get to


1 comment. Reply..

Overall Rating
mpc2485
4 likes
Value
Quality
Like it?
UPDATE: I stand by my earlier assessment that these are great motors for a multicopter; however, I have discovered now that the motor mount tabs do indeed break easily in a crash landing. Perhaps, though, this is better than bending your frame.


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