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Author Topic: single unit sled setup  (Read 6563 times)

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Offline fabr

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Re: single unit sled setup
« Reply #15 on: August 03, 2011, 12:45:46 PM »
Quote from: Engineer on August 02, 2011, 10:35:09 PM
Steel will be easier to integrate into the chassis.  It is just hard to know how much to lighten the plates until you see it in real life.

Is that the jackshaft sprockets that we see in the pictures?  They seem awful small.  If they are both the same size then you aren't getting any gear change out of them?

Is it possible to run 1 longer chain instead of two short ones?

How much reduction does the chain box give?

I like the integral caliper mount.

Good work!
For rigidity I'd still suggest aluminum. Go with 1/4" 6061 and 1/2" for bulkheads. Weight would be roughly the same but more rigid. Just my opinion . Steel is more economical and easier to proto with tho.
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Stomper

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Re: single unit sled setup
« Reply #16 on: August 03, 2011, 01:32:55 PM »
That is definatly something to take into consideration. Once I get (or if I get)this perfected (for lack of better words) I will consider other options to make it lighter/stronger. Like you said for the prototype it will be much easier to do it in steel. Especialy since I have no way to weld aluminum, plus I have never welded aluminum before.
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Offline Engineer

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Re: single unit sled setup
« Reply #17 on: August 03, 2011, 08:59:14 PM »
You really need to figure out your ratios.  Do you know what the ratio was from the chainbox to the sled track?  Also how big was the sled belt drive sprocket.

How tall of tires do you plan to run.

Do you want the top speed to be about the same as the sled was?

If you can tell us these numbers I am sure we could help you with the gearing.
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Offline fabr

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Re: single unit sled setup
« Reply #18 on: August 03, 2011, 09:00:42 PM »
+1!
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Wyattboche

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Re: single unit sled setup
« Reply #19 on: August 04, 2011, 12:14:29 AM »
Quote from: Engineer on August 03, 2011, 08:59:14 PM
You really need to figure out your ratios.  Do you know what the ratio was from the chainbox to the sled track?  Also how big was the sled belt drive sprocket.

How tall of tires do you plan to run.

Do you want the top speed to be about the same as the sled was?

If you can tell us these numbers I am sure we could help you with the gearing.
So is there a formula? How do you fiqure these things out?
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Offline fabr

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Re: single unit sled setup
« Reply #20 on: August 04, 2011, 05:57:31 AM »
It's a national security secret known only by buggy guru's.  ;D ;D ;)
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Carlriddle

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Re: single unit sled setup
« Reply #21 on: August 04, 2011, 07:19:12 AM »
Quote from: masterfabr on August 04, 2011, 05:57:31 AM
It's a national security secret known only by buggy guru's.  ;D ;D ;)
I thought it was called, multiplication. 

Most sled guys seem to be in the 9:1 range, depending on tire size. 
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Stomper

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Re: single unit sled setup
« Reply #22 on: August 04, 2011, 09:45:14 AM »
Quote from: Engineer on August 03, 2011, 08:59:14 PM
You really need to figure out your ratios.  Do you know what the ratio was from the chainbox to the sled track?  Also how big was the sled belt drive sprocket.

How tall of tires do you plan to run.

Do you want the top speed to be about the same as the sled was?

If you can tell us these numbers I am sure we could help you with the gearing.

Cool thats what I was hoping!!

The top gear(driven clutch) is a 21 tooth gear and the bottom gear(drive shaft) gear is a 39 tooth. I will be using 27" quad tires with 12" rims. As far as power goes I want the bottom end torque and power instead of high top end speed. If I can get 60mph top speed with bottom end power that would be fine with me.
As said before there will be a chain from the drive shaft to the ideler shaft and them another chain from the idler shaft to the rear axle sprocket. The rear axle sprocket has to be a max of 12 " in diameter. I hope this is the info that you need. And thanks for the help guys I realy appreciate it!
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Offline Carlriddle

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Re: single unit sled setup
« Reply #23 on: August 04, 2011, 11:08:54 AM »
Is there reduction in that fnr chain box?
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Stomper

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Re: single unit sled setup
« Reply #24 on: August 04, 2011, 12:21:29 PM »
Just the 21 tooth gear(driven clutch) to 39 tooth gear(drive shaft). I will get a picture of the inside of the chain case so you  have a better idea of what I am talking about.
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Offline fabr

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Re: single unit sled setup
« Reply #25 on: August 04, 2011, 12:43:57 PM »
All sprockets in the chaincase are the same size?
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but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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Offline fabr

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Re: single unit sled setup
« Reply #26 on: August 04, 2011, 12:47:36 PM »
Just an FYI,it is always good practice to have not have the same tooth count so as to avoid any repetitive wear patterns developing.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Stomper

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Re: single unit sled setup
« Reply #27 on: August 04, 2011, 07:11:34 PM »
Quote from: masterfabr on August 04, 2011, 12:43:57 PM
All sprockets in the chaincase are the same size?

 ??? ???
I am not sure that we are on the same page. I have never seen a sled chain case with the same size gears/sprockets and I have been in alot of sled chain cases.

The top gear is the 21 tooth gear and the driven clutch in installed on it. The bottom gear is the 39 tooth gear and will have the drive sprocke installed on it.
BTW I don't have the reverse kit in it yet.



The hex shaft on the bottom will have the drive sprocket and the chain will go back to the sprocket on the idler shaft. Then from the idler shaft to the rear axle sprocket. Hope this makes sence
« Last Edit: August 04, 2011, 07:37:05 PM by Stomper »
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Offline fabr

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Re: single unit sled setup
« Reply #28 on: August 04, 2011, 07:58:39 PM »
Sorry,wasn't following you.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

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Re: single unit sled setup
« Reply #29 on: August 04, 2011, 07:59:08 PM »
How will you adjust the chains?
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"
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