Rocket front suspension

[dinosaurjuice]

Hi all,

Been browsing various handling/suspension threads on here recently, in particular KIWI's 'bump steer' thread.

My rocket chassis was one of the vert first to be made, and apart from the camber gain being a little low it seems to be OK. I've certainly not had to do anything outside of the build guide to get it handling OK.

One thing that stands out is the distance between the top wishbone chassis mounts. Mine measure ~800mm centres; KIWI's drawing shows 855.

Anyone else care to measure theirs? Im very curious as to when this change occurred.

Much appreciated

Will

[duratec1999cc]

I am not able to measure mine at the moment, but i found some measurements that i inputted into a simulator in 2015

vsusp

Looking at that model, the distance between my upper wishbone chassis mounts is 843mm
Distance between lower ones is 705mm, i can't remember if thats the measurement of the lower fronts or lower rears because i have a 6mm difference in mine between front and rear. (one of the brackets is welded on out of position)

My chassis was built in September 2014 by RTR

[kpower]

I have the original jigs and moulds as well as all the plans and also an early RTR 2010 chassis. I will do some measurements as well as go through the plans and diagrams I have to see if I can identify when and if a change was made. What I can confirm is within the documents, jigs and plans I have several variations in measurements between jigs and plans and that I have had to back engineer the whole process to try and standardise it all which has taken considerable time and expense. What I have been able to discover from what I have and some measurements from other builds is there were a good few variants (many of which were not recorded) throughout the manufacturing period and they appear to be mainly post 2010 during the period the kit was manufactured under license.

[kpower]

As promised I have measured the early 2010 RTR chassis as well as looked at the plans. The RTR chassis measures 850 between centres on the top wishbone mounts and 710 on the bottom ( this does not tie up with the measurements I have from the original plans). As far as I understand Kiwi's chassis measured 855 top and 705 bottom which would create an even steeper angle than on this early chassis. I can see how easily these distances can vary as the top and bottom curve of the chassis need to be spot on to stop any variation. I can not comment on how the chassis's were previously made but without a very accurate jig which attaches to the main jig to locate the mounts in the same place every time a simple measurement would not be consistent enough. When purchasing the jigs and moulds I can confirm there was NO additional jig supplied to locate the mounts and what I was told ( correct or not) is that it was simply done by measuring the distance. I am in the process of making various jigs to accurately and consistantly locate these parts to try and avoid repeating he same variations. This is one of the reason's the process of getting to the stage I can make consistant builds is taking a long while.