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Old 10-15-2003, 10:41 PM   #1
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Default Shaft vs Belt - New results just in

A very interesting article written on www.rczone.net about two identicle suspension cars with a shaft and a belt drivetrain. Note this is an EP car.

http://www.rczone.net/modules.php?na...rticle&sid=432

Some interesting quotes:

As Andreas had previously been racing with the TC3, he knew the issue about the tourque steer problem which is basically more steering to the left and less to the right. Andreas never realy liked this disadvantage, especially in slippery or half slippery conditions.

the fact that it had quite more rear grip. This is due to the fact that a belt stretches a bit when accelerating and deaccelerating. Because of this, steering could be increased and resulted in a car with basically more grip.

After having tested and had success with the car there isn't an obvious reason to why a shaft car would be faster than a belt car. It's all up to the suspension, setup and of course the driving.

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Old 10-16-2003, 12:11 AM   #2
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no wonder my previously owned yokomo SD felt if it had more right steering then the left..i couldn't figure out why, now i know it has to do with the torque steering..being a belt driven , my losi xxxs feels much better !
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Old 10-16-2003, 06:18 AM   #3
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comments...

Just try it for yourself...

From personal experience, the shaft drive cars I've owned simply accelerate faster, my 1/10th off road electric TTech predator had better acceleration than any XX4, and I reckon my FW05r accelerates better than my VoneRR ever did...


...and I have never noticed torque steer.


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Old 10-16-2003, 04:37 PM   #4
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Quote:
Originally posted by Sp Racer
comments...

Just try it for yourself...

From personal experience, the shaft drive cars I've owned simply accelerate faster, my 1/10th off road electric TTech predator had better acceleration than any XX4, and I reckon my FW05r accelerates better than my VoneRR ever did...


...and I have never noticed torque steer.


LS
You are not alone in what you are saying. However the pro driver mentioned in the article completely disagrees. Could be because the experiment was done with electric powered cars.

In any event I will be trialling out a FW05R soon anyways so I can feel it for myself!
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Old 10-16-2003, 05:15 PM   #5
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Well after seeing Josh Cyruls G4 a few weeks ago I am no longer in awe of the free roll of shaft drive cars.

His car had as much free roll as any shaft car and it had 3 belts.

Granted they were 'special belts' (Kawahara) and they were quite loose, but it was amazing to see. He also said that the belts had great wear.

I put it down on the table, which had a small incline and it rolled away.

I'm sure you saw it to SP, you just don't want to admit it

DC
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Old 10-16-2003, 05:23 PM   #6
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Quote:
Originally posted by OZDC
Well after seeing Josh Cyruls G4 a few weeks ago I am no longer in awe of the free roll of shaft drive cars.

His car had as much free roll as any shaft car and it had 3 belts.

Granted they were 'special belts' (Kawahara) and they were quite loose, but it was amazing to see. He also said that the belts had great wear.

I put it down on the table, which had a small incline and it rolled away.

I'm sure you saw it to SP, you just don't want to admit it

DC
Yep I too witnessed the free roll of his car and was very impressed!

In fact I did a roll off between my EVO with acer bearings in the drivetrain and the SP belts vs a NTC3 recently. We put both on the same incline and released them. My V1RR hestiated for around 0.5 of a second before moving off whereas the NTC3 immediately rolled away. After 10 metres both cars were around 1 foot apart and moving at the same speed.

After saying this I am sure the shaft cars do have an acceleration advantage but as Andreas mentions in the article it is so small as to make very little difference to laptimes. I think the NTC3 and FW05R are good cars mostly due to good suspension rather than the drivetrain.
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Old 10-16-2003, 05:52 PM   #7
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GET YOUR ROLL ON!!

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Old 10-16-2003, 06:03 PM   #8
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A bit off-topic... But here is an write-up by Andreas about the japanse 1:10 electric championship. His X-ray was the only belt-driven car in the finals.

http://www.teamxray.com/teamxray/new...6916bb0994f5d8
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Old 10-17-2003, 02:28 AM   #9
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Quote:
I'm sure you saw it to SP, you just don't want to admit it
Yeah, I admit, his car was awesome, but did you see when we had a "bench race" who the man was??

Moi
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Old 10-17-2003, 05:08 AM   #10
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I thought that belt driven cars were the ones without torque steer... in that article he is talking about getting rid of the torque steer in the belt driven car...
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Old 10-17-2003, 06:35 AM   #11
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Quote:
Originally posted by sausage_link
I thought that belt driven cars were the ones without torque steer... in that article he is talking about getting rid of the torque steer in the belt driven car...
You really are confused you silly sausage .

Shafties have 'torque-steer'.... not that I'd know what it is .
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Old 10-17-2003, 08:58 AM   #12
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Guys the deal on nitro cars that i like about a belt car is the tank is centered.With a shaft car it's off to one side.
I had a NTC3 for a while and could notice a difference in weight to that one side when the tank became more empty.I like belt cars due to lack of the steer problems and also on nitro due to the tank causing weight issue's.
I now run a Schumacher r12 and will say it carries more speed,accelerates as fast if not faster,no torque steer and it's balanced the whole time not changing like the Shaft Nitro Sedan.
Belt cars I like the XXX-s G+ and the Xray T1R.
I like the input guys keep it coming.
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Old 10-17-2003, 12:40 PM   #13
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I agree

I personally prefer belts because...

Belts can be re-routed to ensure the best placement of electronics, ENGINE**,. and fuel tank, etc while shaft drive don't really can.

Because of this, shaft drive cars don't have as good balance in my opinion (I am talking about nitro though). and the engine placement is certainly not the best...


In my opinion, the engine should be placed near the center of the car as possible..
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Old 10-17-2003, 09:24 PM   #14
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Default Out of curiosity

Guys;

Why not design an R/C Car that has a slightly offset Driveshaft?

You could then mount the fuel Tank closer to center and possibly minimize a torque steer at the same time.

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Old 10-17-2003, 09:30 PM   #15
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I have been thinking for a long time how that would work

to have the engine & fuel tank placed in the middle and still have a shaft drive train..

so far, i cant think of a way to do it efficiently

and if it works, the car may be pretty heavy
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