Electric Car Project and racing in 1-5th scale

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EP-1 belt to gears

Postby race d » Wed Jan 26, 2011 7:26 pm

Hi has anyone modified the h a r m EP-1 from belt to gear drive,
although Ive had no problems with the belt the gears are stronger and would
handle more power.
what i need to no is how many teeth i would need on the diff & lay gear
+ keeping the ratio the same
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Postby dragracer » Thu Jan 27, 2011 11:44 am

If we can work out the belt gearing of the original drive, then we should be able to convert that to gears.
Will your new motor be turning the same RPM as your have to take that into consideration.

Your more than welcome to pop over one night for a model evening Colin.

Nick
From 1st March 2014, the Crystal Palace track will be now know as the Crystal Palace Car Club

To fast down the straights and crap round the bends, that's the life of a Dragracer.
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Postby nozdog » Thu Jan 27, 2011 1:48 pm

Hi if you cantact Gary from total racing also the chairman of the brca he had a harm converted to gears from belts I'm sure he will no what parts you need. Garys user name on here is the stig if you wont to pm him.

:D
HA! Alex Fire Up The Quattro

If only I could go faster!

www.nozdogracing.co.uk
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Postby race d » Thu Jan 27, 2011 8:31 pm

thanks nozdog sent the stig PM.
i no the clutch gear is 20 and spur is 44 as standard
Adam from rapid racing said gear ratio is 8.25.
so i think 20 lay 75 diff or 15 lay 48 diff. but not sure if they will fit in the space between layshaft and diff, if i can get to car i will measure it

race d
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ep-1 belt to gears

Postby race d » Thu Jan 27, 2011 9:11 pm

OK measured the space between centre of diff to centre of laygear is approximately 206mm hopefully one of you tek wizards could tell me if 20-75 or 15- 48 1/5 gas have this gearing in this space, if this makes sense
thanks
race d
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Postby nozdog » Fri Jan 28, 2011 10:29 am

Hi here is a link to the Alro Gear Chart. Its easy to use just change the numbers in the chart to what you want and it will give the gearing you want. Just remember to change the tyre size first I think you should stick with 16 48 tried 15 48 on my off road car and was no good for top end speed. start with 20 44 16 48. its then easy to just change the clutch bell gear to get were you want to go with the gearing.

example

43 20 2.15-1 48 16 3.00-1 6.45-1 140 20000 81.83 50.82
44 20 2.20-1 48 16 3.00-1 6.60-1 140 20000 79.97 49.67
45 20 2.25-1 48 16 3.00-1 6.75-1 140 20000 78.19 48.57

http://www.alroracing.com/ratio_chart.xls
HA! Alex Fire Up The Quattro

If only I could go faster!

www.nozdogracing.co.uk
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Postby 51reutter » Fri Apr 15, 2011 10:12 pm

Electric tests made on 5th scale cars by HOBBY CENTER with the new engine Mamba XL combo by Castle Creations

Here is the link to the report http://www.hobbycenter-france.com/article.php?idArt=429

cheers
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Postby RcTek » Fri Apr 15, 2011 10:30 pm

Hmm...
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Postby 51reutter » Wed Nov 16, 2011 1:34 am

Serious development work going on on http://rivall.nl/ their prototypes are amazing 8)

congrats to them

Cheers
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Postby dragracer » Mon Jun 10, 2013 4:27 pm

Kicking this post into 2013,
A club member turned up Saturday with a new FG 4WD electric 5th.
After a tinker with the shocks I can only say WOW :o what a great bit of kit, very fast and LOADS of potential.

Nick
From 1st March 2014, the Crystal Palace track will be now know as the Crystal Palace Car Club

To fast down the straights and crap round the bends, that's the life of a Dragracer.
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