Boring Brick

[maddox10]

I do have lasercut adaptorplates that should make it possible to mount 42 or 50mm NTM outrunners were a speed 900 fitted.

[mrsam]

That sounds great mario I'll pm you

[Eventorizon]

You could go mad and go for 2 RS775 motors per side. Provided they are set up right, that would be a very punchy set up!

You can get them from Banebots, Robot Marketplace and ebay:

http://banebots.com/pc/MOTOR-BRUSH/M7-RS775-18

http://www.robotmarketplace.com/products/0-TRA5675.html

http://www.ebay.co.uk/itm/Traxxas-Ti...0-TRA5675.html

[Ellis]

You wouldn't need two. 18v 775s have superior power and torque figures than speed 900s at 12v. Once you've put a 775 through double the reduction, on paper, they outperform an overvolted speed 900.

[Eventorizon]

Well, one 775 then, but you would need another stage it seems to make the drive match or exceed the Speed 900's.

[mrsam]

Cheers for the advice guys, still not sure how to play it at the moment though. The adaptor plates for the brushless motors is tempting but possibly just to keep things simple for now i could buy a few of the Caldercraft motors and upgrade to brushless at a later date.

[Ellis]

It's likely the caldercraft motors will work better than low speed sensorless brushless. Possibly by quite a lot in terms of control finesse. Nobody has fully cracked sensorless brushless drive, and those who are getting there have high (2 stage) reductions and faster motors. Also, you can probably heavily overvolt the caldercrafts, being such big cans they should dissipate heat quite well.

[mrsam]

Caldercrafts it is then for now, i can't see them being massively underpowered as a drive system especially seeing as i'll be running them on 6s. Thanks again to everyone for their input.

[mrsam]

So i was watching Series 6 of RW back through and after seeing Supernova again i've decided i really like the design, so i'm putting it to the vote as to which spinner i build. If you like the vertical design i posted then vote for that, if you like the following design then vote for it. Imagine it with bigger wheels and a lipo, design would be a lot like this.

[daveimi]

I like this design better, easier to make invertible etc.