psychorevo

Hello all,

I just installed the aluminum propeller driveshaft and I must say, I'm a bit dubious.

I've been into the micros scene for awhile and in terms of driveshafts, lighter is better. On 28th and 18th scales, the lighter the shaft, the easier it is for the engine to reach max revs and put power to the wheels.

Well, I removed the plastic stock driveshaft and determined that the plastic one is lighter. Hence, I think I will lose some toruque and off the line speed.

In addition, I eventually might want to experiment putting my Mamba into this TT. But wouldn't it put more stress on the differentials and drivetrain with the aluminum? With the stock plastic one, doesn't it bend this absorbing some of the shock and torque from the motor?

I don't know. I haven't tested yet but I'm theorizing and making educated inferences.


Opinions/Experiences?

Silentbob343

When moving to a lighter flywheel in a 1:1 car you typically lose torque and I am way to lazy to go into why this occurs

Raguvian

If you have a heavier driveshaft, it'll have more inertia > more torque (I think) So I suppose it'll take longer to coast to a stop? But you'll be losing energy trying to rotate all the mass.

Silentbob343

good enough.

Rare

TT-01 tranny is near bullet proof. Just dont go WOT right off the line.

infernox

the ally or carbon driveshaft will actually help torque due to the fact that there wont be any slop/play on the driveshaft. its not going to bend and twist under torque, which is good. plastic does and the gram or so that its heavier wont cancell the effect, it increase topspeed by a fraction but not slow the accel

bIGmiK

All I know is that if your pushing more than a stock motor you need to get rid of that plastic one, it's too flexable.

Eman77

Off topic, but I don't buy that. I would think that a lighter flywheel means you can accelerate it to speed much faster, resulting in more HP to the wheels off the line. I'm not sure how that would mean a loss in TQ though!

lee172

yeah, i wouldnt trust the plastic driveshaft with a decent motor. plus the alu one looks well smart!

Silentbob343

"Do you lose torque with the lighter flywheel? Yes and no. You lose torque to start the car moving, since less energy is stored in the flywheel- so you have to apply more torque from the engine. On the other hand, you use less torque to overcome the inertia of the flywheel while accelerating and decelerating, so you can use the torque from your engine more effectively. You don't lose any torque when going to a lighter flywheel- you just change the source and application of torque in your car's drivetrain."

There's more to it, but again I'm too lazy.

sleepy23

My Feedback: (1)

if the driveshaft truely is plastic, then carbon would be better, aluminum is too much rotating mass. i use to use aluminum in my tc3 until i realized less mass equlas more acceleration. i recently changed my tc4 to a carbon shaft and will let you know how it holds up to the brushless power.

bIGmiK

A carbon shaft isn't available for the TT-01 unfortunately sleepy.

Plastic, or alluminium, take your pick.

madster11

i have a tt-01 and its had a rs-540 st in it, and the plastic ds has handled it fine, unfortunatlly my esc is dead so i cant really test my new lrp 21x2 motor
but i think an aluminum ds would increase the overall strengh of the gears, but problem is, if i chopped out my bevel pinion gear when using rs-540 immagine what a 21x2 double would do with the shaft, as the shaft would transfer more shock (from bumps and wheel spining) to the PLASTIC gears.

by the way bigmik, couldnt you just make a carbon shaft using a mold, but i think that a carbon shaft is available from a 3rd party (not tamiya) already though

bIGmiK

Ummm no and no. Well I spose you could make a mould, but who would want to do that? Seriously, aluminium is fine.

I run the lightweight version from TOBEE.

And, you must have done something wrong to strip gears with the silver can. And ofcourse the plastic shaft will handle the silver can, it has about as much power misquito.

infernox

gpm makes a carbon shaft bigmik, i actually have one

bIGmiK

Ahhhh really? Hrmm I'm not surprised that your mentioning that GPM make one.

Can I get a link to it please?

How are yuo finding it?

How much does it wiegh?

infernox

im the importer, what do you expect.

check this pdf
http://www.truevision.co.za/download...MIYA_TT-01.pdf

infernox

its as light as the ally, maby a bit lighter, but phenominal, def worth another few miliseconds

bIGmiK

That shaft looks good, I might get one matched with titanium propperler joint things.

infernox

yep, i got the titaniums aswell, but will be rebuilding the tt01 as the company demo car, just waiting for the red dogbones

bIGmiK

Where can I can that shaft though?

Can't find it on rcmart or ebay?

infernox

asiatees, or i could maby organise you one, just havta check the international prices

infernox

ok just spoke to the supplier, i can get you one, its just gonna be shipping aswell... will that be alright?

bIGmiK

You have a PM, notice if any RCU admins read this he was not selling in a forum, just helping me out.

TIGER76

I upgraded the plastic DS when i upgraded my motor to a 21D when i tried it with the plastic one and held the car in hand you could see the plastic warping tried it again with the alloy one and much better no warp