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Why two ladders?

Shocks, Springs, Brakes, Frame, Body Work, etc

Moderator: Team

Posts: 1788
Joined: Tue Aug 10, 2010 9:16 pm

Re: Why two ladders?

Post by peejay » Sun Aug 12, 2018 9:55 pm

Nefario wrote:
Wed Aug 01, 2018 12:31 pm
BillyShope wrote:
Wed Jun 27, 2018 9:07 am
Why do the builders of ladder bar cars use two ladders?
I'll suggest that most builders have never heard of 6 degrees of freedom or understand what that means. You also need to be able to visual the 6 motions and how they are controlled. Or just use rubber bushings and let parts bend...which is fine in many applications.
Part of what took me so long to stick a Ford 9" rearend in a thirty year old Mazda was my insistence that the suspension have a completely full range of articulation without binding. I had to compromise the suspension geometry a bit, and shave the top of the pumpkin for Watts linkage clearance, and do some unhealthy things to the Watts bellcrank, but I got it to work.

Most people just figure the suspension barely moves, so who cares.

Posts: 1520
Joined: Wed Jul 31, 2013 10:14 pm

Re: Why two ladders?

Post by Krooser » Sat Aug 18, 2018 11:49 pm

The four link dirt late model suspensions use a single "lift arm" with two shocks/springs at the end of the lift arm that controls torque on acceleration and deceleration.
Luxemburg Speedway Hall of Fame Member Class of 2019

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