Featherweight Drive Motors

[AndrewHibberd]

I am working on my new featherweight and am at the point where I should be looking at drive motors. Weight is going to be an issue because of the pneumatics.

Basically I am after any suggestions for drive motors for a feather so I can decide what to go for. The only real limitation is the motor should be as close to inline to the drive shaft as possible due to the space available.

I want to avoid drill motors, but the list so far:

speed 900s
speed 720s
dewalt powerdrive kit
astroflights
banebots 775 motors and planetary gearbox

What other options are available for featherweight drive?

Thanks
Andy

[typhoon_driver]

Re: Featherweight Drive Motors

drill motor
bosch 35w

[Thunder arrow]

Re: Featherweight Drive Motors

Drill motors
And like ^
Bosch

[widow_twanky]

Re: Featherweight Drive Motors

These are ok and quite like the old technobots gold motors. Got one gear box made so far and you can make up the gear boxes with two bits of nylon 6 and a few spur gears. Just rebuilding BOOM! to work with these and they seem ok so far.

http://www.ebay.co.uk/itm/300511267976

[typhoon_driver]

Re: Featherweight Drive Motors

bought a couple myself. They are a copy of a speed 900. Similar specs and dimensionally the same. They drew the same no load currents when I tested them as well.

[Max]

Re: Featherweight Drive Motors

What would people recommend for a 90 degree gearbox for a speed 900 or are there any motors which come with a 90 degree gearbox already fitted?

[PJ-27]

Re: Featherweight Drive Motors

Windscreen Wiper motors and Bosch 35's come with 90degree gearboxes I believe.

[Max]

Re: Featherweight Drive Motors

I am not using wiper motors again!!!

[PJ-27]

Re: Featherweight Drive Motors

Haha, given their weight and size you'd think they'd be super powerful!

So why avoid drill motors? They're powerful, small, light and some with fitted gearboxes that are equally small and light. There's also a chance the BG is all metal and they are cheap!

[typhoon_driver]

Re: Featherweight Drive Motors

for 90 degree gearboxes you are either looking to bosch 35s or to a custom solution

[ewan]

Re: Featherweight Drive Motors

Knab the gears out of something like this http://www.toolstation.com/shop/Power+T ... 400/p40354

[mattsdragons]

Re: Featherweight Drive Motors

would have though they would be plastic gears and that they wouldnt be strong enough?

[ewan]

Re: Featherweight Drive Motors

Wouldn't think so, should be designed to take the torque of a drill

[maddox10]

Re: Featherweight Drive Motors

Team RCC has looked into speed 700's and 600's for a feather drive. It always involves a 2 stage gearing.
But it is possible. After all, the most we ever have drawn from the batteries in a fight with a feather is 35 watts.

19.6V, 5 minutes. Means an avarage amperage of 21 amps. So any motor with a stall of 40 amps+ can do the job.

For cheap 90° gear sets that can do the job, look into budgetfriendly 4 or 4.5 anglegrinders. Those are ment to take the power (from 500W to 1100W), can be cheaper than seperate gearsets from HPC or simular, and come with bearings and all. Gearratio from the ones I used for Prodigy Evo's dual Speed 900 disk-drive were 2.5-1.
Meaning, if you add a first stage 12-72 (6-1), you have a 15-1 gearratio, meaning with 80mm wheels @12V with a speed 700 (15K rpm), the endspeed is 15 km/h.

[AndrewHibberd]

Re: Featherweight Drive Motors

Thanks for the responses, I am going to have to finish machining the big bits before finalising the drive. Still not really sure what to use...