Update: Have one? Building one? Click Here: Donkey Quad Manual
A while ago I bought an inexpensive HobbyKing F330 frame, thinking I would use it with some SunnySky X2212-9 1400KV motors and 8" props I had. Unfortunately, that turned out to be a very unstable combination. It was fast as hell, and good at aerobatics, but I couldn't tune the shakes out of it. I decided those motors were just too big for that small 330mm frame.
On a whim, I was looking at the cheapest 3S capable outrunners that HobbyKing sells when I ran across these ugly duckings here:
The Donkey ST2004-1550kv, "When pulling power matters and looks.. well.. just don't."
|HobbyKing Donkey ST2004-1550kv|
But, they're dirt cheap, they work as advertised, and they're seemingly a lot more crash resistant than the similar-rated Park300 1400kv motors I used to use on a similar sized quad.
I had to use 4" zip-ties to attach them to the F330 frame. I did it by threading the tie down through one hole, under the frame, up through the opposing tang, and then putting a cut off zip-tie "head" on the other end. Repeat for the other set of tangs and you have a solid mount with no screws. ;)
|Mounted w/zip ties|
Paired with some disused Afro 12A ESCs, a MultiWii MicroWii FC, OrangeRX R100 receiver, and some 7x4.5 props and I have a small, super light, fairly agile quad. It's not the fastest one I own, but it's light and agile enough to do in-place flips or double-descending-rolls.
It turns out to be a joy to fly, and I've been spending more time with it than my more expensive quads.
Several people have asked me for a parts list, so here it is:
|4||Donkey ST2004-1550kv Brushless Motor|
|4||Turnigy Plush 9g 10A ESC|
|1||MultiWii MicroWii ATmega32U4 Flight Controller|
|1||OrangeRX R100 DSM2 Satellite Receiver|
|1||XT60 Male power connector|
|4||Props: 7045, 7060, or 8038 (2 CW & 2 CCW)|
|4||3mm prop adapter|
|1||ZIPPY Compact 2200mAh 3S 25C Lipo|
A few build notes:
- Use 4-inch zip-ties to attach the motors (described above)
- You can use an XT60 to 3.5mm bullets power distribution cable instead, especially if you choose 10/12A ESCs that have 3.5mm bullets. I built one this way, and one with directly soldered leads.
- You'll have to bind the R100 to your transmitter with a separate receiver (or by flashing special Spektrum Satellite Bind Code to the FC first.)
- This quad can actually carry a 2600mAh battery for 10+ minutes of flight time!
- Add a lipo alarm to warn you when the battery is low.