Quote:
Originally Posted by Lee
I understand it would need a disc brake but you would have to have them in the drive shafts if you wanted each wheel to be independent 
Also, i have never rebuilt diffs every few races, i raced open diff cars for years and i only ever rebuilt them after a wet race, a lot of it is down to the grease you use  |
The actual car that had this had a ventilated brake disk as part of the outdrive:
The oneway sat inside the rear pulley. So this worked just fine, except for the 1:8 power being too brutal for the one-way. Keep in mind that the driving force applied to the front wheels are a joke compared to what's going on in the rear!
Anyways, for electric we would need a small brake servo in addition to the ESC to be able to brake and give throttle simultaneously... not legal but I've always wanted to try this! Electric motors respond quickly, but for a gas engine you could keep the clutch engaged and the revs up... and for all classes you'd keep the car more stable going through fast sections!
I've been doing RC all my life, and I've learned to hate a few things:
-radio interference
-cleaning bearings
-maintaining brushed motors
-rebuilding diffs
I find it very difficult to build two identical diffs. Not to mention that they should be broken in after each rebuild (incl. sanding down the plates and so on), and gradually tightened. Takes a lot of time! I'd LOVE to just be able to tune a gear diff, and note down my setup... Btw I seem to recall that Serpent had on its Impact some years ago a special diff. I think the diff itself was always the same. And there was an adjustment of some friction plastes in addition... think it worked very well! (don't recall if that was a ball or gear diff though)
Is it really as good as a ball diff??? Why did we then get ball diffs in the first place???
And more: if we go back to gear diffs... we can then have torsen diffs, tactyl diffs... or would that not be as suitable as for 1:8 OR? Keep in mind that with LiPos next year we can add some weight back on the cars...
Quote:
Originally Posted by sparrow.2
You could make it work with center one-ways and brake discs on the gearbox input shafts.
You would be adding a lot of weight though for a very questionable advantage.
You can achieve a si,ilar effect by turning off autobrake altogether on brushless setups. I tried this and basically found that the car tends to understeer more than if you have autobrake dialled higher since it doesn't transfer as much weight to the front when you let off the power.
Hope that made sense...
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I just make these presumtions, I'm not quite sure:
-the tranny should be as free moving as possible. When coasting I'd wish it was "gone". And no motor brake / drag whatsoever
-the only thing slowing the car down (except when braking) should be the friction between the wheels and the ground
I feel this caters for smoother, more consistent & faster cornering. And in many cases it's faster not to use brakes at all...