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Old 05-25-2002, 05:47 PM   #1 (permalink)
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shock travel v. wheel travel

Anyone know how to calculate how much a given amount of shock travel will translate into actual wheel travel in a set-up with the shock mounted vertically? Specifically, the front axle set-up of a 90.
Troy
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Old 05-26-2002, 12:13 AM   #2 (permalink)
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Measure the distance between the two shocks, then measure the distance between the two tyres (the points where you want to measure the wheel travel) then the wheel travel is the shock travel times the ratio on the two distances.

eg. if the shocks are 6feet apart and the wheels are 8feet and you got 10in travel shocks then the maximum possible wheel travel is 10x8/6 = 13.33333in of wheel travel.

Have fun!!



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Old 05-26-2002, 12:05 PM   #3 (permalink)
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Sam,
Thanks --- that's exactly what I was looking for-
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Old 05-28-2002, 04:55 PM   #4 (permalink)
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Okay smartie-pants...Now rake the shock forward 10 deg, AND towards centerline (inward) 4 deg...Now how much wheel travel do you have?

Assume a 14" travel shock on a 69" wide axle...Shocks 60" apart....

Hmmmmmm?

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Old 05-28-2002, 05:53 PM   #5 (permalink)
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I think it's called a tape measure....

lol


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Old 05-28-2002, 09:16 PM   #6 (permalink)
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uhhhh .... Rich?
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Old 05-29-2002, 08:01 AM   #7 (permalink)
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Quote:
Originally posted by RockRover
Okay smartie-pants...Now rake the shock forward 10 deg, AND towards centerline (inward) 4 deg...Now how much wheel travel do you have?

Assume a 14" travel shock on a 69" wide axle...Shocks 60" apart....

Hmmmmmm?

--D
Trying to get someone else to do your work for you, huh?
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Old 05-29-2002, 02:38 PM   #8 (permalink)
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Quote:
Originally posted by RockRover
Okay smartie-pants...Now rake the shock forward 10 deg, AND towards centerline (inward) 4 deg...Now how much wheel travel do you have?

Assume a 14" travel shock on a 69" wide axle...Shocks 60" apart....

Hmmmmmm?

--D
Easy

With the shock angled to work out the effective vertical travel is just 14 x cos(10) x cos(4) which works out to be 13.75in.

so the wheel travel will be 13.75 x 69 / 60 = 15.8inches.

Although if you are going to start to worry about the effect of the small angle of the shock then doing the ratio thing isnt going to be all that accurate. You would have to work out the actual geometry and stuff cause the ratio thing assumes everything moves vertically etc.

But I figure it is accurate enough.

Shiat, now doug you should be able to work out how far you will be able to drive up a ramp!!!!!

Sam
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Old 05-30-2002, 09:17 PM   #9 (permalink)
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Ahhhhh....So you DO know your Trig then....Goood Grasshopper....Good.

Actually it's the 4 degree inwards that had me stumped...Not that it really means anything in the real world. Guess that's why I damn near flunked out of Statics in skool...

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