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Old 04-20-2005, 07:47 PM   #16
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no belts on a 2wd direct drive car
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Old 04-20-2005, 08:32 PM   #17
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I like the idea of the get up and go of a direct drive.
My friend said:
"why don't you just get a 10th pan car and put a TC body on it"
I told him that I really didn't think they would handle the same.
That along with the fact that I love wrenching on my cars is why I would like to try it.
How was that Corally anyways?
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Old 04-20-2005, 08:45 PM   #18
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I thought the ROAR rules did not allow direct drive??
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Old 04-20-2005, 08:54 PM   #19
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Hmm, that tech racing is interesting....

Looks like it has the motor mounted so it runs in reverse, compared to conventional belt car (ie motor on the right).

If you look closely at the second pic, you can see there's two layshaft's, one at the front of the car (in background), and one at the rear. The both have gear reductions to connect to the pulleys, which would allow the diffs to spin the right way....

To me, that seems like a pretty inefficient drive train... to many extra bits causing friction.

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Old 04-20-2005, 09:02 PM   #20
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Quote:
Originally posted by scoobydo
How was that Corally anyways?
It was so good people affectionately named it the ASSassin and Corally scrambled to put together a better car (how many updates did they do?).

The RDX is an awesome machine but you can't do the direct drive with it.
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Old 04-20-2005, 09:13 PM   #21
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Quote:
Originally posted by TryHard
Hmm, that tech racing is interesting....

Looks like it has the motor mounted so it runs in reverse, compared to conventional belt car (ie motor on the right).

If you look closely at the second pic, you can see there's two layshaft's, one at the front of the car (in background), and one at the rear. The both have gear reductions to connect to the pulleys, which would allow the diffs to spin the right way....

To me, that seems like a pretty inefficient drive train... to many extra bits causing friction.

Later
Ed
sorry guys, didnt know direct drive meant 1 stage reduction. thought it meant just gear to gear(not counting bevels) and yea. the fx. wonder if it squats a lot on acceleration from the RKE of the motor spinning in the unconventional direction. and if i were the designer i would put the rear-front belt around the diffs rather than another pinion. which definitly adds more parts to rub and weight, i mean this car has 3 spurs and 3 pinions? i think? it seems to be a fun idea though. id love to try it out.
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Old 04-20-2005, 09:48 PM   #22
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Quote:
Originally posted by dr_hfuhuhurr
It was so good people affectionately named it the ASSassin and Corally scrambled to put together a better car (how many updates did they do?).

The RDX is an awesome machine but you can't do the direct drive with it.
I think one of the problems with the US market is that they expect every car to be good with ALL situations.
Carpet, Asphalt, Rubber, foams, rubber on carpet etc...
If it doesn't meet up to standards in any one of those areas, the car is deemed garbage.
If they were to release a direct drive TC and it only worked best for one situation,
then they would take a lot of headaches off their hands.
However, that would be limiting yourself to one specific group.
But who cares? As long as the buyer goes in knowing what it was designed for.
Was the Assasin DD good in any of the multiple driving situations?
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Old 04-20-2005, 09:55 PM   #23
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the dd assassin was really good on slick tracks, but the more the grip went up, the more the back of the car flexed. then i got the thicker chassis and it worked great, it handles just as good, but the problem was the width of the chassis by the motor, it was so thin it had alot of flex, thats y it was so good on slick tracks
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Old 04-20-2005, 10:02 PM   #24
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Quote:
Originally posted by kartermdb
the dd assassin was really good on slick tracks, but the more the grip went up, the more the back of the car flexed. then i got the thicker chassis and it worked great, it handles just as good, but the problem was the width of the chassis by the motor, it was so thin it had alot of flex, thats y it was so good on slick tracks
That would be my point. What if the Assasin was marketed as an asphalt car with the emphasis on the great flex it had? Anybody buying it for carpet would just be dumb and many of the so called faults would not be brought to light since it is suppose to be a low traction asphalt car.
The only problem is that everybody would be complaining about how they neglected the carpet racers.
Thats my problem with the market. Release it for what you intend it for and stick to your guns.
If you run carpet, this car is not for you!
But companies are afraid to do that.
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Old 04-20-2005, 10:19 PM   #25
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Quote:
Originally posted by Joel Lagace
I thought the ROAR rules did not allow direct drive??
Actually roar just staes it must have independent suspension at all 4 corners. Does not mention anything about direct drive, just no sloid rear axles like what is found on pan cars.

I would think if you removed the center layshaft on a touring car, you just removed that much more friction and it would benifit from it in many ways. IT does limit gear ratios some, but when you loose that much rotating mass and friction, the ratios should not matter nearly as much. Just my opinion on this. Those images look sweet though how they have the vehicles layed out, the first photo to me would be perfect for a touring car.
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Old 04-21-2005, 04:57 AM   #26
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Quote:
Originally posted by 403forbidden
Direct drive = less parts

less parts = cheaper to maintain

cheaper to maintain = less profit potential for RC companies

less profit potential for RC companies =
It's true but the owner of this car would spend more time and more labor replacing spur gear alone ( assuming the spur gear have trouble between finals )

.......... but the whole car looks nice and powerful though. Single belt is more efficient system than 2 belts, or less friction?

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Old 04-21-2005, 12:13 PM   #27
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I don't think they would spend much time.
If you look closely at the other pictures, the diff is held in by the Alum Camber plate,
Which is held in by 6 screws. Take that off and the diff with the spur comes right out. Or at least, it appears.
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Old 04-21-2005, 01:11 PM   #28
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Wouldnt the large spur gear increase the CG of the drive train? With companies to trying to lower the GC as much as possible these days that may be an issue. I would also think that the internal dive ratio would be very high.
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Old 04-21-2005, 02:00 PM   #29
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Besides the height of the CG created by this, there is also the factor of "Bind" that must be considered. The diff outdrives are so high, they are always going to be in a situation where there is wear created in the outdrive. most other cars have the diff outdrives centerline pretty close to even with the dog-bones at the suggested ride height.
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Old 04-21-2005, 03:13 PM   #30
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nobody is saying there will not be issues to work out, but with nobody trying it, how can they be worked out?
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