Bruiser II

[jonny]

up the voltage?

[razerdave]

What speed controller are you using ? I get the feeling the motors will draw some considerable power.

[Bodge Job]

I'm useing two syrens, the single channel version of the sabertooths. And we were running it on a flat car battery, so it's quiet a few volts lower that what were tubing it on, as we are going to use 2 7.2 volt rc battery's in series, so it will be at 14.4 volts, so hopefully it will run better.

[razerdave]

Are they the 25A versions ?

[Bodge Job]

Yeh, think they should be enough, with the high current cut out and all.

[maddox10]

@ 19.8 V we had the problem Kashei's scorpion XXL started cutting out on the Speed 900 MSR 12-54 combination with 100mm wheels. We solved it with a Sidewinder.

As the copies have a higher current draw, it could be that 25A ain't enough.

On the other hand, if the wheels ain't too grippy, it should limit the power used.

[Bodge Job]

Yeh that's what I was thinking, although I can't afford another controller, so i don't know what I would do if that was a problem.

[PJ-27]

Those side pods look very well made!

look forward to seeing you guys at the GSL again, we've got to represent Suffolk!

[maddox10]

Simplest solution if the speedo's cut out on overcurrent, less V.

Something I think will be needed whatsoever.

Those cheapo's run a lot faster than a Graupner Speed 900. I messured them 11000 rpm @12V

11000/12=900 rpm/v
900*14.4V=12960 rpm

Gearratio 5-1. 2592 rpm on the wheels.

0,125m*pi*2592= 1017m/min=61km/h

[PJ-27]

Those cheapo's run a lot faster than a Graupner Speed 900. I messured them 11000 rpm @12V

How much!? The stats on the seller's page say 6700 rpm no load at 12v!

http://www.ebay.co.uk/itm/12-v-ELECT...60160129600452

Well that changes my predicted measurements slightly....