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Old 02-02-2010, 05:39 PM
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Default PVC go kart, with fiberglass

So i've had the idea to make a go kart for a while, but i never had the money or the time. But now i do. So my idea is to make a simple go kart frame from PVC then rap it in a couple of layers of fiberglass for extra strength. So today i got all the PVC parts and fiberglass i need, but now im stuck on what kind of engine to get. I don't have alot of money to spend on it, so im looking to find an engine. Im trying to make a fast go kart, probably in the 60v-72v range, maybe 40 mph. So what do you recommend for the engine? Ill post pics of the frame when i finish it.
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Old 02-02-2010, 05:45 PM
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Whoa buddy....
Unless you weigh like 20 lbs and have carbon fiber skin and bones I wouldn't even think of PVC or any plastics for a go kart. Imagine how PVC breaks. It breaks into dagger like pieces, now imagine one lodge in your rear...Yeah, don't think so.
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Old 02-02-2010, 05:49 PM
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hope you have done your homework on a plastic frame. electric motors have a lot of torque. the 6.5hp motors will generally get you there. most of speed is gearing and weight. 2 strokes vibrate too much, so i would say 4 stroke. any idea of the karts weight? the frame with all running gear except motor and driver. wrapping pvc in fiberglass doesn't seem as strong as filling the pipe with fiberglass
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Old 02-02-2010, 05:50 PM
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Did a quick search and found this:
http://rob_fed.tripod.com/PDF/pvckart.pdf
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Old 02-02-2010, 05:58 PM
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You, sir, are a braver man than I.
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Old 02-02-2010, 06:23 PM
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Quote:
Originally Posted by mike75925 View Post
wrapping pvc in fiberglass doesn't seem as strong as filling the pipe with fiberglass
actually wrapping it would be stronger for the same reason that larger thin walled tubing is stronger than smaller thick walled tubing. also filling it with expanding foam might add some strength too
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Old 02-02-2010, 06:30 PM
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wrapping it by crossing the grain of the glass would strengthen. rod flexes, tube not so much. sand the pipe with some 80 grit paper for good adhesion. and wipe down with acetone or something too. are the pipes going to be vacuum bagged?
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Old 02-02-2010, 06:31 PM
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Update, i found a 120v electric engine in a shopvac, you think i can suscesfully run it at like 72v?
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Old 02-02-2010, 06:33 PM
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Quote:
Originally Posted by toystory_4wd View Post
You, sir, are a braver man than I.
thanks!
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Old 02-02-2010, 06:33 PM
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it's probably AC so unless you get a big inverter, no
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Old 02-02-2010, 06:34 PM
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Quote:
Originally Posted by mike75925 View Post
wrapping it by crossing the grain of the glass would strengthen. rod flexes, tube not so much. sand the pipe with some 80 grit paper for good adhesion. and wipe down with acetone or something too. are the pipes going to be vacuum bagged?
vacuum bagged? vas is das?
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Old 02-02-2010, 06:35 PM
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I have heard that running an AC motor at a substantially lower voltage is detrimental to it's health. No idea if there's any truth to it...
Wait! 72v DC? thru an AC motor? Nope.
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Old 02-02-2010, 06:35 PM
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Quote:
Originally Posted by dpaxson View Post
it's probably AC so unless you get a big inverter, no
ok well what would you recommend for a cheap cheap fast engine? something i could find...mabye even...steal O.o
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Old 02-02-2010, 06:37 PM
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Quote:
Originally Posted by Russ2251 View Post
Did a quick search and found this:
http://rob_fed.tripod.com/PDF/pvckart.pdf
ooooo i like, this is similar to what i had in mind, but i looks like if i do this ill have to run out and buy alot my PVC parts !
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Old 02-02-2010, 06:39 PM
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ohh and im using 2" PVC parts and tubing, incase anyone needs it for...anything lol
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Old 02-02-2010, 06:41 PM
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Is that the white stuff? ABS (the black stuff) I think is thicker.
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Old 02-02-2010, 06:46 PM
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Quote:
Originally Posted by toystory_4wd View Post
Is that the white stuff? ABS (the black stuff) I think is thicker.
its abs, but i really think with fiberglass and mabye some foam in critical areas this thing could really work...and i have no welding experience.
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Old 02-02-2010, 07:30 PM
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any other ideas?
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Old 02-02-2010, 08:29 PM
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what schedule? i know of schedule 40, but i only dabble in plumbing. i think the higher the number the thicker.
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Old 02-02-2010, 08:40 PM
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Quote:
Originally Posted by mike75925 View Post
what schedule? i know of schedule 40, but i only dabble in plumbing. i think the higher the number the thicker.
to be honest is the schedule that is on the shelf at home depot, lol i didn't rly look more then that.


and i think im going to layer smaller pipes inside of the frame, and a small metal pipe on the very inside, like this

http://pvcbuggy.com/plans.html



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