XRAY - Model racing cars

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 Post subject: How Fast Can It Go Mister???
PostPosted: Mon Nov 10, 2008 18:50:15 
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Joined: Thu Nov 06, 2008 23:14:11
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Location: Staffordshire, United Kingdom
Please forgive me for my ignorance, but I have never heard of 1/12th pan cars before. I'm keen to find out though.

But, the most important question - with a decent LiPo and brushless kit;

"How fast will it go Mister?"


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PostPosted: Mon Nov 10, 2008 20:03:20 
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Location: Michigan, USA
A good number of years ago, 1/12 racing migrated to 4-cell, as the speeds with 6-cell were getting out of control.

With the light weight, low friction and excellent aerodynamic properties, these cars can reach incredible speeds and handle exceptionally well....with 4-cells even.


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PostPosted: Mon Nov 10, 2008 20:10:16 
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As with all kind of racingsports it goes about the laptimes.

And that could mean to have a lower topsped by a lighter gearing and in that way to be quicker in the corners for faster laptimes.


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PostPosted: Mon Nov 10, 2008 23:01:27 
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Location: Estonia, Tallinn
They go something like this :roll: http://www.youtube.com/watch?v=BaWXTR0TKW8


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PostPosted: Tue Nov 11, 2008 19:00:14 
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That YouTube video answers my question - dang that is quick!


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 Post subject:
PostPosted: Tue Nov 11, 2008 20:27:21 
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http://www.team-orion.com/media/ita06-112a1.wmv

http://www.team-orion.com/media/ita06-112a2.wmv

http://www.team-orion.com/media/ita06-112a3.wmv

use the save a... option


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PostPosted: Thu Nov 13, 2008 16:39:08 
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Location: Trencin, Slovakia
The 1/12 is fairly quick, see the videos from the recent Worlds at www.redrc.net


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PostPosted: Mon Nov 24, 2008 22:12:04 
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Location: Portland, OR USA
mario wrote:
The 1/12 is fairly quick, see the videos from the recent Worlds at www.redrc.net


Mario- what do you think about the new 3.7(?) volt single cell lipo that they released, do you think we will have a rear traction problem with that? (never bothered with lipo save for sedan which its GREAT. But this one you lose voltage. and weight, ie rear traction...??

Cheers


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PostPosted: Tue Nov 25, 2008 02:33:01 
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A differently wound motor with more kV can deliver the same power with lower voltage but will draw more current.
This is harder on the batteries and cables though and can be for the Motor and ESC. I think 2S with a motor and gearing limit would be more sensible.

Weight can always be added if necessary.


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PostPosted: Tue Nov 25, 2008 04:37:20 
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Robin Frischkopf wrote:
A differently wound motor with more kV can deliver the same power with lower voltage but will draw more current.
This is harder on the batteries and cables though and can be for the Motor and ESC. I think 2S with a motor and gearing limit would be more sensible.

Weight can always be added if necessary.


Well what I was talking about was SMC's new 1S 3.7 volt pack. drops in. so maybe use a 3.5 instead of a 5.5. hmmm we might be onto something...

I build real race cars.. I am getting REALLY good at hiding weight places lmao. Not that I have ever thrown a water bottle or a headset in a racecar after a race.... LMAO


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PostPosted: Tue Nov 25, 2008 09:13:42 
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The problem with higher voltages is that people are always choosing the faster motors. But look arround you, high voltages is the way to get a lot of power transfered with low currents. (trains, hybride cars, the voltage to your house etc)

If you go to higher voltages just ban out the lowest turns motors and you will end up with the same power at lower currents.


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PostPosted: Tue Nov 25, 2008 09:59:00 
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Roelof wrote:
The problem with higher voltages is that people are always choosing the faster motors. But look arround you, high voltages is the way to get a lot of power transfered with low currents. (trains, hybride cars, the voltage to your house etc)

If you go to higher voltages just ban out the lowest turns motors and you will end up with the same power at lower currents.


agree'd, but we had problems with that with the 10 turn limit.. anyhow, I am just tired of the shorter competitive nimh packs, and also the cycling drives me nuts.. lol my nitro engines take less attention..


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