First kart project.
- Thread starter Gopedude
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mckutzy
Well-known member
I thought you answered that with my last post. Going to atach it to the rim with longer studs.
Fabroman- ya that wasn't meant to be a pun just something off handedly, but now it was quite befitting of the topic.
Yes. Those round dark spots are called knots, where the tree branch was receiving its nutrients from when the tree was in the ground.
Fabroman- ya that wasn't meant to be a pun just something off handedly, but now it was quite befitting of the topic.
Yes. Those round dark spots are called knots, where the tree branch was receiving its nutrients from when the tree was in the ground.
Gopedude
New member
My plan is to attach the sprocket using long bolts and spacers.
Fabroman- that is a bit expensive. What i meant, is do i need to get a sprocket that fits the bolt pattern width on my rim?
Fabroman- that is a bit expensive. What i meant, is do i need to get a sprocket that fits the bolt pattern width on my rim?
Gopedude
New member
???
Gopedude
New member
will this work?
http://www.bmikarts.com/Clutch--35-34-_p_721.html
with this
http://www.bmikarts.com/35-RLV-Extreme-Chain-Gold-on-Black-_p_637.html
im thinking about getting a tire sprocket like this. But, i need to find one where the bolt holes line up with my rim
http://www.bmikarts.com/Sprocket-35-72T-2-1316-Bolt-Circle_p_1377.html
http://www.bmikarts.com/Clutch--35-34-_p_721.html
with this
http://www.bmikarts.com/35-RLV-Extreme-Chain-Gold-on-Black-_p_637.html
im thinking about getting a tire sprocket like this. But, i need to find one where the bolt holes line up with my rim
http://www.bmikarts.com/Sprocket-35-72T-2-1316-Bolt-Circle_p_1377.html
Gopedude
New member
I think this is a better sprocket to use since i can cut my own bolt holes. The question is, will it fit my tire? (will it be too big?)
https://www.bmikarts.com/mobile/Sprocket-35-60T-No-Bolt-Holes_p_1401.html
https://www.bmikarts.com/mobile/Sprocket-35-60T-No-Bolt-Holes_p_1401.html
Here's an easy way to get the size of a sprocket from the picture, not exact but It works.
If you know the center hole size, in this case its 1-3/8 Then you can measure using the picture the approximate size of the sprocket.
Each hole is gonna be at least 1 inch in this case. Now you just gotta add up the fraction. so its 3/8 the hard way [my way actually]
Is to do, 3/8 plus 3/8 = 3/4 plus 3/4 = 1 1/2 plus 3/8 = 1 7/8 So the approx size [if the picture is that actual sprocket and not some generic stock photo.]
6 7/8" from top to bottom.
Attachments
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sprk.jpg
Gopedude
New member
If thats correct then it should fit my 10 inch wheel fine. I could always ask bmi for dimensions
Doc Sprocket
*********
There is a MUCH better way to get a rough sprocket diameter.
(#of teeth)x(pitch in inches)
-----------------------------------
3.14
#35 chain is 3/8" pitch, so-
60x0.375
------------
3.14
=7.16" Diameter (approximately. There IS a variance, but it's a lot more accurate)
(#of teeth)x(pitch in inches)
-----------------------------------
3.14
#35 chain is 3/8" pitch, so-
60x0.375
------------
3.14
=7.16" Diameter (approximately. There IS a variance, but it's a lot more accurate)
Gopedude
New member
So if i get the clutch i linke in my post and the sprocket,
I would have a 12:60 ratio.
So as you suggested i use a 10:60 ratio, with this setup in my previous post ill get slightly better speeds correct?
I would have a 12:60 ratio.
So as you suggested i use a 10:60 ratio, with this setup in my previous post ill get slightly better speeds correct?
Doc Sprocket
*********
Yes- And this is where I say something else you don't want to hear. If you gear at 5:1 or 6:1, your kart will be capable of completely unsafe speeds for what it is. Personally, I would advise being down around 10:1. That will result in a top speed of 10.7 MPH- which, IMHO- is still pushing the envelope for what you're building.
FWIW- 12:60 is properly expressed as 5:1, and 10:60 is properly expressed as 6:1. Always reduce the denominator to 1.
FWIW- 12:60 is properly expressed as 5:1, and 10:60 is properly expressed as 6:1. Always reduce the denominator to 1.
I was close.....
Gopedude
New member
Well, turns out im scrapping the front wheel setup. Goig to go with a wider wheel stance for the front and use ackerman steering. Im goin to keep the rear wheels on though. Pics to come
And why would you now change your setup??? Would it be because you see it is not going to work :toetap05: :toetap05:
The clutch would work fine, and so will the chain. The chain looks a bi expensive though. I would just go down to my local engineering shop and ask for a certain length of 35 chain. It will be a lot cheaper. Don't forget to buy the master link to close the chain up
Gopedude
New member
Trial and error. The front tire setup works, but not that great. Im rethinking how to do the front wheels. The frame so far appears like it will work fine. I am going to follow jwalker's advice with the cross supports.
Your trial will become your error dude. Seriously...step away from the wood saw and rethink your life. Is this how kids act out now-a-days....threatening suicide by gokart?!
What city and state do you live in so we can check the obituaries.
Gopedude
New member
There is nothing wrong with my interest in building stuff. No need to be harsh. Im not "threatenting suicide" im just seing how different designs work
Gopedude
New member
My frame is very similar to the kart in your link. That steering setup is terrible though.
Your kart is very dissimilar to the kart in the link. You are putting your frame rails AGAINST their strength, and your gussets might as well not even be there. I have no problem with you using wood for your frame. It is a proven, if uncommon, building material for wheeled vehicles. My problem with your frame is that it is not a matter of will it will fail, but when it will fail, and the answer to that question is "soon". I know that you are 14, and you know everything there is to know, but please, listen to the experienced people who are screaming at you to rebuild your frame, and do it right this time before you hurt yourself.
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