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carChips Avatar
carChips Victor Harnish
Kelowna, BC, Canada   CAN
1933 MG Magnette
1973 Triumph Spitfire 1500 "Chip"
1989 GMC Sierra 1500 "Bush Truck"
Hi, my name is Vic. I live in Kelowna, British Columbia, Canada. I wandered over here from the Triumph experience out of curiousity and found some guys building carts that look real fun. I'm planning to build a cart and have a question. For the rear axle, is it live to both rear wheels? I would like to see more of how the rear axle is mounted up. Do you guys think a quad rear diff would work?



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DavidMGA1600 Avatar
DavidMGA1600 David Lake
Gold Coast, Queensland, Australia   AUS
1960 MG MGA "Dads Car"
1961 CycleKart Race Car "Team Ferrari"
Victor,

Welcome to the Cyclekart Club.
To answer your question have a look at the photos in the attached link.

Cyclekart chassis

There are a lot of people here with a lot of knowledge and im sure they will chime in with good advice.

David.



David

1960 MGA 1600 Convertible,
Gold Coast, Australia.



Edited 1 time(s). Last edit at 2012-10-31 06:32 AM by DavidMGA1600.

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carChips Avatar
carChips Victor Harnish
Kelowna, BC, Canada   CAN
1933 MG Magnette
1973 Triumph Spitfire 1500 "Chip"
1989 GMC Sierra 1500 "Bush Truck"
How does this engine look? Not the cheapest one on the shelf, but better than the straight china one.
http://www.princessauto.com/pal/product/8367864/Horizontal/6-HP-169cc-OHC-Gas-Engine
Give me your thoughts.



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smcameron Stephen Cameron
Santa Clara, CA, USA   USA
The classic design calls for a live axle with one wheel keyed, and one wheel free wheeling (not keyed) with lots of axle grease. Since, mostly, there's not a lot of difference in the rate of rotation between the keyed and unkeyed wheels, apart from when turning, there's not a lot of friction to deal with, so this works fine. There are go-kart differentials, but there is some worry that with the light weight of the front end, driving both wheels induces and undesirable amount of understeer, and this is only going to be worse with a live axle and both wheels keyed. (Haven't tried myself, so not sure how much of a problem the understeer is or is not.)

The gittreville crew have tried a variety of rear wheel drive systems.
http://www.gittrevillegp.com/www.gittrevillegp.com/Blog/Entries/2011/1/19_BUILD_SERIES_no._2__Rear_axle_and_drive.html

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carChips Avatar
carChips Victor Harnish
Kelowna, BC, Canada   CAN
1933 MG Magnette
1973 Triumph Spitfire 1500 "Chip"
1989 GMC Sierra 1500 "Bush Truck"
Thanks Stephen, that is some helpful info. I think the basic design is what I'm going for. I'm more into the model aspect of the cart than making it into a racer. If I find someone to race, it might happen. Or, I might be able to talk someone in to making one too, I don't know of any carts in my area.



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carChips Victor Harnish
Kelowna, BC, Canada   CAN
1933 MG Magnette
1973 Triumph Spitfire 1500 "Chip"
1989 GMC Sierra 1500 "Bush Truck"
All I can find locally is 1 X 2 tubing for the frame. Has anyone tried this?



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refisk Avatar
refisk Rick Fisk
Frankenmuth, MI, USA   USA
Some of the Gittreville karts were built with 1" x 2" tubing. The Build Series blog on their website has many detailed pages showing how their karts were built. Check out all of the blog pages - lt's of good stuff to see! smiling smiley

Rick

http://www.gittrevillegp.com/www.gittrevillegp.com/Blog/Entries/2011/1/22_BUILD_SERIES_no._4__Frames_(and_tubs).html

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DavidMGA1600 David Lake
Gold Coast, Queensland, Australia   AUS
1960 MG MGA "Dads Car"
1961 CycleKart Race Car "Team Ferrari"
In reply to # 420 by carChips All I can find locally is 1 X 2 tubing for the frame. Has anyone tried this?
Victor, I have not built a cyclekart yet but i would look for the 1x3 RHS section if you intent to run your axle through the centre of the RHS. I you intend to fix the axle to the under side the 1x2 could be OK just ensure it is strong enough not to flex in the vertical direction when the chassis is built, as the increase in member depth will massively increase its stiffness.



David

1960 MGA 1600 Convertible,
Gold Coast, Australia.

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carChips Avatar
carChips Victor Harnish
Kelowna, BC, Canada   CAN
1933 MG Magnette
1973 Triumph Spitfire 1500 "Chip"
1989 GMC Sierra 1500 "Bush Truck"
Yeah David, I was totally thinking to undersling the rear axle. Being a lighter frame work, I think I will put a couple of extra cross braces to stiffen the chassis. I've seen the super "7" project done completely with 1 by 1s for the cockpit and most of the chassis. So, if I feel there will be too much flex I'll add a couple struts.
http://www.canadianlocost.com/Locost%20reality%20check.htm



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DavidMGA1600 Avatar
DavidMGA1600 David Lake
Gold Coast, Queensland, Australia   AUS
1960 MG MGA "Dads Car"
1961 CycleKart Race Car "Team Ferrari"
Colin Chapman made that method of construction famous, "add lightness till it breaks then add a brace".



David

1960 MGA 1600 Convertible,
Gold Coast, Australia.

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