Hello Andrew, Cool, so its just the leverage effect of having the spring mounted in between the pivot point and the wheel. I think I remember this on my Z, but I havent paid a lot of attention to that just yet, at the moment I am mainly doing mundane things like replacing batteries, bulbs, broken bits etc etc. If I get my hands on a digital cam some time I will take some pics, its not much, but its mine :)
Friday, May 03, 2002, 4:16:47 PM, you wrote: AG> Hey Mark, AG> I dont know about the intelligent bit but thanks :) AG> oops sorry if you (and probably everyone else) didnt have a clue AG> what I was saying!! AG> Basically I was trying to explain that: AG> * the spring to corner ratio relates a spring at its attachment AG> location to its effect at/on the wheel (corner) AG> * is related to how much the spring moves for a given wheel AG> deflection AG> * it can be worked out if someone has a different car, or changed AG> their spring attachment point (race car?), and wants to work out the AG> effect of their springs AG> Hope that clears it up?! AG> Sorry, AG> Andrew >> Dam - there are some intelligent people on this list. >> >> Andrew I have no idea what you just tried to explain, but I do understand >> the basic concept. It's good to know that we have people on this list who >> can actually "figure out" the engineering aspects of the cars we love - good >> work mate! >> >> Mark. >> >> ----- Original Message ----- >> From: "Andrew Greenbury" <[EMAIL PROTECTED]> >> To: <[EMAIL PROTECTED]> >> Sent: Friday, May 03, 2002 11:49 AM >> Subject: RE: question >> >> >> > Hi Bob, >> > >> > Because of the strut suspension on the front, the "effective" spring >> > rate at the wheels (or wheel rate) is roughly the poundage of the >> > springs. But because the springs are inboard on the rear, their >> > influence at the wheels is reduced, so stiffer springs are required >> > on the rear to have the same effective rate at the wheels. Terry >> > says this spring to corner (wheel) ratio is roughly .26 >> > >> > I may be wrong but I think he gets this from: >> > Kw=Ks*(IR)^2 >> > where Kw = effective rate at the wheels (wheel rate) >> > Ks = spring rate >> > IR = installation ratio, or motion ratio = y/x where y = the resulting >> > spring compression from a wheel deflection x >> > >> > ie the spring to corner ratio is a measure of the spring position to >> > the wheels. Terry is saying IR^2 =.26, because for a given >> > deflection at the wheel, the 1600 rear springs compress roughly >> > half that amount?? >> > >> > Im open to corrections, and sorry for the backwards explanation! >> > Andrew >> > >> > > What is the spring to corner ratio a measure of? >> > > >> > > > Ben, >> > > > >> > > > It depends on the car i.e. IRS etc? On a 1600 most of the good >> > > handling dirt >> > > > versions have slightly softer springs in the rear. When you look at >> > > the >> > > > poundage rates on a 1600 allow for the spring to corner ratio on the >> > > rears >> > > > which as around .26:1 and on the front with stock struts the rate is >> > > 1:1. >> > > > i.e. 200# front springs are the same as ~800# rear springs. On a >> > > 1600 RC a >> > > > good starting rate is 175# front and 600# rear. >> > > > >> > > > regards >> > > > Terry >> > > > -----Original Message----- >> > > > From: [EMAIL PROTECTED] >> > > > [mailto:[EMAIL PROTECTED]]On Behalf Of Ben >> > > > Sent: Friday, 3 May 2002 12:05 PM >> > > > To: [EMAIL PROTECTED] >> > > > Subject: question >> > > > >> > > > >> > > > bit of a strange question. my brother has sent me his RC car to >> > > rebuild >> > > > for him. im just setting up all the suspension at the moment. just >> > > > wondering, with a normal car setup, are the rear springs stiffer >> > > than the >> > > > front, or is it the other way round?? >> > > > >> > > > >> > > --membersozdat------------------------------------------------------- >> > > > OZDAT Mailing List Please Note:- >> > > > Send (un)subscribe requests to [EMAIL PROTECTED] >> > > > Send submissions to [EMAIL PROTECTED] >> > > > No unauthorised redistribution of this email >> > > > http://www.ozdat.com/ozdatonline/index.htm >> > > > http://www.ozdat.com/ozdatonline/listindex.html >> > > > http://www.mail-archive.com/[email protected]/ >> > > > >> > > --------------------------------------------------------------------- >> > > > >> > > > >> > > --membersozdat------------------------------------------------------- >> > > > OZDAT Mailing List Please Note:- >> > > > Send (un)subscribe requests to [EMAIL PROTECTED] >> > > > Send submissions to [EMAIL PROTECTED] >> > > > No unauthorised redistribution of this email >> > > > http://www.ozdat.com/ozdatonline/index.htm >> > > > http://www.ozdat.com/ozdatonline/listindex.html >> > > > http://www.mail-archive.com/[email protected]/ >> > > > >> > > --------------------------------------------------------------------- >> > > >> > >> > >> > >> -- Best regards, Bob mailto:[EMAIL PROTECTED] --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
