Few months ago I bought few Multistar motors from HobbyKing, the 390kv and 420kv, 22 poles. I thought about updating my Talon Tricopter frame by installing longer arms and new motors.
The Talon frame is very strong and all carbon made, but it's for 16x19mm motors. So, you have to custom design an adapter if you want to mount Multistar motors.
I started taking the measurements, and put together in Rhino a layout of the motor mount, which I then loaded into Xpert Mill for milling few of those
This is what I came up with. This adapter is milled from a 3mm thick aluminium plate. The picture shows the motor mount with the 4 16x19 holes threaded, and the 3 outer countersunk holes for the motors
Some details showing how the adapter is put on the Talon motor mount
Turned upside down, this shows how the motor adapter holes match the motor ones.
Finally the adapter installed on the tail motor mount nicely in place. I also use thrust bearings to minimise vibrations
And her you can see how the adapter has been installed on the 2 front motor mounts
The end result is great. A very stable Tricopter which I fly with GoPro and KK board, 14x8'' Graupner eProps, HK FY-30A flashed ESCs, and 4S 6000 25C Nanotech.
With this setup you get a very smooth flights and can over for about 20min.
the adapter can be installed on DJI arms as shown in the picture above. Of course, if you intend to use the Multistar motors on these arms you would just go with the 610-690kv ones, possibly on 4cells. with 9" through 12" props.
If anyone is interested, I can provide the adapter and the screws as set.
Hope you like it! greetings from Switzerland
/dan
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