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Old 12-08-2003, 02:42 PM   #16
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Thank's guy's on all the input i do race at full throttle /lakeland moving from my local track to something bigger. my tc3 is good on small tracks but the big ones its only a b or c main car, found out the pipe's starve it on top end that's why i'm moving to a belt car and more duralbe i riped it apart at the turkey shoot out.
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Old 12-08-2003, 07:03 PM   #17
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Default Engine Brake ??????

As i asked before how does the Engine Brake system work and what does it do ??
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Old 12-08-2003, 10:43 PM   #18
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Default Re: Engine Brake ??????

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As i asked before how does the Engine Brake system work and what does it do ??
as long as the clutch is still engaged it uses the engines de-accelerating rpm's to slow the car with out using the brakes , pretty much like down shifting a manual transmission in a car.
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Old 12-08-2003, 11:19 PM   #19
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Default Re: Re: Engine Brake ??????

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Originally posted by r12 schumacher
as long as the clutch is still engaged it uses the engines de-accelerating rpm's to slow the car with out using the brakes , pretty much like down shifting a manual transmission in a car.
Wouldn't that strain the engine conrod a little since now off throttle the conrod also experiences forces of the "engine braking"?
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Old 12-09-2003, 07:15 AM   #20
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Default Re: Re: Re: Engine Brake ??????

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Wouldn't that strain the engine conrod a little since now off throttle the conrod also experiences forces of the "engine braking"?
not sure , i have raced this car and engine for at least 13 races and had no probles yet
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Old 12-09-2003, 07:36 AM   #21
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Default Re: Re: Re: Re: Engine Brake ??????

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not sure , i have raced this car and engine for at least 13 races and had no probles yet
What is your R12 weighing in at?
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Old 12-09-2003, 07:51 AM   #22
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Default Re: Re: Re: Re: Re: Engine Brake ??????

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What is your R12 weighing in at?
with the added weight and transponder its around 1730
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Old 12-09-2003, 07:59 AM   #23
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Very nice....
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Old 12-09-2003, 08:17 AM   #24
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Default Re: Re: Engine Brake ??????

Quote:
Originally posted by r12 schumacher
as long as the clutch is still engaged it uses the engines de-accelerating rpm's to slow the car with out using the brakes , pretty much like down shifting a manual transmission in a car.
Hmmmmm, forgive me if I'm wrong, but. . . .

You've got conflicting things happening here. You've a motor that has a bearing on the clutch which engages only after a certain RPM so dropping the revs on the motor automatically disengages the clutch. . .so how decelerating will keep the motor engaged, I don't know.

sorry, have to run before I get to the other things. . .
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Old 12-09-2003, 08:46 PM   #25
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Default Re: Re: Re: Engine Brake ??????

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Originally posted by Boomer
Hmmmmm, forgive me if I'm wrong, but. . . .

You've got conflicting things happening here. You've a motor that has a bearing on the clutch which engages only after a certain RPM so dropping the revs on the motor automatically disengages the clutch. . .so how decelerating will keep the motor engaged, I don't know.

sorry, have to run before I get to the other things. . .
BOOMER!!! The car has got a an interesting fly wheel on the outer spur. You fix the 2 speed shift point and the 'engine brake' there. Go look at the car and try to figure it out, I have been but to no avail! The 2 speed shift is not a shoe clutch system too. Most interesting car actually ...
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Old 12-09-2003, 11:38 PM   #26
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Default Re: Re: Re: Re: Engine Brake ??????

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Originally posted by tIANcI
BOOMER!!! The car has got a an interesting fly wheel on the outer spur. You fix the 2 speed shift point and the 'engine brake' there. Go look at the car and try to figure it out, I have been but to no avail! The 2 speed shift is not a shoe clutch system too. Most interesting car actually ...
so the brake isn't on the engine. . .it's on the 2-speed tranny. . .

still don't see how that would work.

Location of pics?
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Old 12-10-2003, 01:05 AM   #27
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Default Re: Re: Re: Engine Brake ??????

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Originally posted by InitialD
Wouldn't that strain the engine conrod a little since now off throttle the conrod also experiences forces of the "engine braking"?
Not Trying to answer this one but.... if you are in a 'downshift' type mode wouldn't the cars inertia be alot less then the downforce of accelleration on the conrod? I have no numbers to go on but Nitro acceleration I would Think is exponentially Higher in Downforce as opposed to downshift upforce where you are still achieving combustion in the chamber.If you follow? Its not like you are shutting the key off and downshifting.Very intresting innovation for R/C possibly.In any 1:1 racing a clutch and Tranny are used and those guys don't freewheel around corners with the clutch disengaged. Although they don't race more then 1 race between motor rebuilds either.I Love stuff like this it gets the mind working in alternate directions then status quo...Gonna Have to Take a Look at the R12 now to see what they are playing with there.
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Old 12-10-2003, 07:52 AM   #28
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r12 has a finger clutch instead of a shoe clutch right
they look very easy to adjust from the looks of it, but the whole
engine breaking thing i don't really get either ,cause you still have a clutch on the motor that disengages once you let off the throttle and the rpms drop, maybe the 2 speed will stay engaged though which would increase the rotating mass and slow the car down somewhat , but that is not the engine doing any braking . i i agree with fisher nteresting topic though
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