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bradh89
17-05-2004, 03:48 AM
I am looking at buying a tc3 to start my own speed project. How fast would a d6 6t and 7 nimh cells push a tc3? I plan on using a novak dually, can I use lipo batteries with it? If so how many should I use?

Thanks

Joost van Leeuwen
17-05-2004, 06:47 AM
Don't use a very low wind motor, they will make lots of RPms but lack the torque need for top speed.
Best wind would be a 10T.

How fast are you aiming to go and with what kind of car?

Luke Hobson
17-05-2004, 07:49 AM
it says that he is running a TC3 :p

you do not need alot of torque to get top speed though (look in stock motors and the Trinity Monster),
to get the torque you would just gear the motor differently,
i would try a 6, with 7 cells, it would be a bit weighty though,

HTH
luke

Joost van Leeuwen
17-05-2004, 07:55 AM
Whoops sorry :D

With a TC3 you will have a problem getting the right gearing, the smallest spur I have been able to find is 60T, together with a 35T pinion you will have a drive ratio of only 4.28.
You should be able to find larger pinions (I have seen 46T 48DP) but they will be very hard to find.

fwiw, I can't find any speedrun using a very low wind motor. Most use 10T or over...

Luke Hobson
17-05-2004, 07:58 AM
i think you would be looking at over 60-70mph minimum at a estimate, but it depends on gearing,

hth
luke

Joost van Leeuwen
17-05-2004, 08:05 AM
A friend of mine did 60Mph on a speedrun last year with a stock TC3 and an 11 or 12 turn motor.
With a bit or preparation you should be able to go much faster.

johnbull
17-05-2004, 09:02 AM
With a 6 turn motor and 7 cells I think you can forget about the Dually.

It's a very good speedo but I don't think it will take that kind of punishment. I run a Tempest on my dragster with 8 turn motor and 10 cells and have never had a problem.

Incidentally on a very long run - 1/4 mile we hit over 80 mph but it was a costly business.

Regards

Joe from sunny Malta.

bradh89
17-05-2004, 12:32 PM
What esc do you recommend? Also, could I use li-po batteries to acheive higher voltage with less weight?


With a bit or preparation you should be able to go much faster.
You think it will go faster than 70? :eek: I sure hope so. :)

MattW
17-05-2004, 01:23 PM
You've got to be really careful when trying to increase the number of cells of you will just melt it all! Not sure about the Li-poly cells, but my gut reaction is that they won't be able to deliver the power that you are looking for.

I'm sure there was a thread about a similar subject on here quite some time ago.

Dave G
17-05-2004, 01:55 PM
under no circumstances use lithiums with 540 motors..they cannot deliver anywhere near the current you would be asking of them,they will expand then catch fire.
if you are after speed then a hot brushless setup is the way to go,it all depends on your budget.

dave

bradh89
17-05-2004, 09:41 PM
Someone on another forum told me to use a 10t instead of a 6t, should I? If I do decide to go brushless which one should I get?

Doughty
21-05-2004, 10:00 AM
LRP V7.1 speedo is the one you want(if you go brushed), it can cope with up to 12 1.2v cells (must be setup to run turned off and with a reciever pack to power reciever/servo)

lewist
21-05-2004, 11:45 AM
I know of a speed controller that is unlimited and can run up to 15 volts, it can also be custom modified for more power.

i know its unlimited on 6 cells, and in theory shold be ok of 15 volts but as i say can be modified to run more i belive!!

and its less than £55 !

B_Final_Bob
21-05-2004, 07:23 PM
The insane speed run people use either Aveox 2T Brushless motors. If they don't use brushless motors they use 10T motors optimised for speed runs made by a company called Twister.

Some of these cars average over 100mph. Tyres are the biggest problem.

Hope this helps

Liam