Re: JEEPSTER BUILD UP PAGE
Oooops -- I stand corrected, my mistake, sorry.
Something was bothering me about that, so I put a pencil to it.
The 70% is more correct.
Let's assume for a moment the verticle axle travel is 6".
And assume a shock mounted vertically would be 15" fully
extended (droop,) then in the compressed state it would be
Shock travel naturally would be the entire 6".
If the 45 degree angle was made at full droop, fully extended.
At full droop:
Vertical dimension is still 15" (call that A)
Offset inward 15" (call that B)
The shock length is the hypotenuse of the right triangle formed (call that C)
(A sqd + B sqd) = C sqd = 21.2"
In the fully compressed position:
A is now less, measuring 9" (15-6)
B remains the same 15" (the shock's now even more on it's side)
(A sqd + B sqd) = C sqd = 17.5"
In other words:
21.2 fully extended
17.5 fully compressed
shock travel = 3.7" (61% of the original 6" vertical movement)
Now a variation of that -- if the shock's 45 degree angle was
made at the full compression measurement:
17.5 fully extended,
12.7 fully compressed,
shock travel = 4.8" (80% of the original 6" vertical movement).
Figuring at normal rest the suspension is somewhere "in between"
fully compressed and full droop, so the 70% approximation is
I hope this makes sense.
It's just simple right triangle geometry calculations.
Just plug in your numbers.
I've been trying to calculate the spring rates, angles, and
positions on my project with the Tomcat rear and the hybrid
front, calculations weren't coming out right. I was looking
at it wrong.
So thanks for getting me to think on another track.
By the way Jim, it looks great so far.