adam73bgt
Club Retro Rides Member
Posts: 4,869
Club RR Member Number: 58
|
|
Jan 28, 2013 11:26:56 GMT
|
Hi there, I'm currently doing a module at uni that requires me to find some information about the handling of a Land Rover Defender, at the moment I'm trying to work out the roll stiffness of one and there's a dimension i need that i cant find anywhere on the net  So if you happen to be reading this and have a tape measure and a Defender to hand would you mind measuring the distance between where the suspension springs mount to the axle (for the front and rear axles if they're different). Alternatively if you happen to know this info off the top of your head then that would be appreciated also! ;D Cheers |
| |
|
|
|
|
|
Jan 28, 2013 13:23:38 GMT
|
|
Get yourself down to a Land Rover dealership with tape measure in hand!
Interesting question though. How are you calculating roll stiffness? I just finished a vehicle dynamics course at uni and we never calculated it, because the course was too basic.
|
| |
|
|
|
|
|
Jan 28, 2013 14:20:49 GMT
|
|
Measurements are + or - 1" / 25mm on Land Rovers ! If you measure the chassis of numerous brand new Defenders you will such discrepancies are normal.
Paul H
|
| |
|
|
|
|
|
Jan 28, 2013 14:27:18 GMT
|
|
Hi, Defender 110 spacing is greater on the rear than a 90. Because 110 have a larger diameter spring at the rear.
Colin
|
| |
|
|
adam73bgt
Club Retro Rides Member
Posts: 4,869
Club RR Member Number: 58
|
|
Jan 28, 2013 18:33:56 GMT
|
Get yourself down to a Land Rover dealership with tape measure in hand! Interesting question though. How are you calculating roll stiffness? I just finished a vehicle dynamics course at uni and we never calculated it, because the course was too basic. haha i thought about doing that the other day as i drove past one! ;D we were given some equations, the one for vehicles with beam axles was quite simple, its roll stiffness= 2k*a^2 where k is the spring rate and a is the distance from the spring to the centre of the car (the centre of gravity strictly but ours is straight down the middle) after a short discussion with our lecturer it seems that rough values were fine as hes more interested in seeing our method etc. which is fine by us considering we're using data taken from 90's defenders and some data from a rather handy looking technical drawing of a '64 series landy  thanks for the replies though  |
| |
|
|
|
|
|
Jan 28, 2013 20:41:25 GMT
|
Ask if you can get access to a program called "Adams Car" Monstrously powerful program, you can put in every linkage on a suspension setup, give spring stiffness, ARB stiffness, etc, etc. You then run it through one of a couple of dozen simulation types, and it can spit out a good hundred or so graphs (if not more!) telling you everything you'd ever need to know about the suspension geometry  Got an assignment using it right now - it's taken about 8 hours of practical sessions, just to get to grips with the software, and another 4, to TRY and get the simulations running. But it's really good for testing suspension setups, and seeing if any mods you're planning will do good,or bad |
| |
You're like a crazy backyard genius! |
|
adam73bgt
Club Retro Rides Member
Posts: 4,869
Club RR Member Number: 58
|
|
Jan 28, 2013 20:46:20 GMT
|
We're going to be using adams once we've worked out all the data we need, hopefully should be a case of sticking the data in and getting usable stuff out  |
| |
|
|
|
|
|
Jan 28, 2013 20:49:35 GMT
|
|
|
| |
 Click picture for more |
|
