Steady on fellas - I havent got it/finished yet, so my status is still of lowly student for the time being :) And Im not the only phd - Dave Andrews is working towards getting better tables at restaurants as a doctor as well :)
My work is on investigating vehicle performance of racecars particularly in simulation and modelling. Investigation area is v8supercars. Gotta say certain companies have taken a keen interest in my 1600 project in recent job interviews, and without all your help it just wouldn't have happened so thanks again for all the help so far. Andrew ps Errol I tried to call yesterday, so Ill try again when I get a chance > Congratulations Andrew! > What did you do your doctorate on? > > Cheers > Feral Errol > Get Serious! http://www.datrats.com.au/ > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of rclough > Sent: Monday, March 22, 2004 9:46 PM > To: [EMAIL PROTECTED] > Subject: Re: factory front toe spec > > Would you expect anything less from a PhD? We are in esteemed company! > ---- Original Message ----- > From: Andrew Greenbury <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Wednesday, March 31, 2004 12:31 PM > Subject: RE: factory front toe spec > > > > Gday Dave, > > > > I don't even know what that word means :) > > > > Yeah another excellent book is "Racecar Vehicle Dynamics" by Milliken > > & Milliken (bit exxy, but is avail at various libraries). > > > > "Ackermann" is a term that gets thrown around when talking steering > > geometries. At low lateral accelerations the outer wheel turns a larger > > radius than the inner wheel, so the inner wheel needs to turn more if it > > isnt going to scrub. "Ackermann steering geometry" approximates the > > correct geometry required so both wheels turn about a common point, > > and occurs nicely when the steering arms are designed to point toward > > the centre of the rear track. (Static) toe in and toe out add to or > > subtract from Ackermann geometric effects. > > > > Ackermann geometry is common on road cars (low lateral > > accelerations) so that the wheels turn freely in corners without > > dragging. Parallel steering (wheels turn the same amount) or even > > Reverse Ackermann (outside wheel turns more than inside wheel) is > > common in racing to try and get peak force from both tyres at high > > lateral accelerations. If the peak cornering force of the inner (less > > loaded) tyre was at a lower slip angle, then using the low speed > > Ackermann geometry (inner wheel steered more) would drag the tyre's > > operation past its peak performance. The car could be slower because > > the inner tyre is producing less force than it could, the drag of the tyre > > operating past its peak, and the tyre temp would go up because of this > > drag. Hence reverse Ackermann (inside wheel turns less than outside) > > could be better. > > > > Hope this all makes sense and its a compromise to best utilise the > > tyres, > > > > Andrew > > > > > You two are incorragible. > > > > > > Sounds like a good book Andrew. Does it mention anything about this > > > Ackerman angle thing? > > > > > > Dave > > > > > > On Tue, 2004-03-30 at 08:21, Errol Smith wrote: > > > > Aaaasso Glasschopper, > > > > With more pleasure to driver from loss of happy contact of tyre with > earth; > > > > passenger make less pleasure, wider eyes and higher dung hill with > direct > > > > proportioning as tyre/try rise from road. > > > > Noise of tyre is pleasure for driver and sure to make dung now > mountain rise > > > > rapidly for passenger. > > > > > > > > Window open is needed for make driver happy with petrol smell not dung > > > > mountain. > > > > And so the lesson ends. > > > > > > > > Cheers > > > > Feral Errol > > > > www.Datrats.com.au > > > > > > > > -----Original Message----- > > > > From: [EMAIL PROTECTED] > > > > [mailto:[EMAIL PROTECTED] Behalf Of > > > > [EMAIL PROTECTED] > > > > Sent: Tuesday, March 30, 2004 9:08 AM > > > > To: [EMAIL PROTECTED] > > > > Subject: Re: factory front toe spec > > > > > > > > > > > > Aaahhh.... > > > > So this give pleasure more to driver than passenger and make happy > contact > > > > with road and tyre become separated as road and tyre give displeasure > to > > > > each other upon corner and make everyone happy. > > > > > > > > I get it now. Thanks. :) > > > > > > > > ----- Original Message ----- > > > > From: "Errol Smith" <[EMAIL PROTECTED]> > > > > To: <[EMAIL PROTECTED]> > > > > Sent: Tuesday, March 30, 2004 8:35 AM > > > > Subject: RE: factory front toe spec > > > > > > > > > > > > > Geordie, this is the paid for translation......... : ) hope it > helps. > > > > > > > > > > "While it can" being the operative phrase. The inside tyre doesnt > stay on > > > > > the deck with any appreciable contact/loading very long : ) > > > > > Cheers > > > > > Feral Errol > > > > > www.Datrats.com.au > > > > > > > > > > -----Original Message----- > > > > > From: [EMAIL PROTECTED] > > > > > [mailto:[EMAIL PROTECTED] Behalf Of > > > > > [EMAIL PROTECTED] > > > > > Sent: Monday, March 29, 2004 5:15 PM > > > > > To: [EMAIL PROTECTED] > > > > > Subject: Re: factory front toe spec > > > > > > > > > > > > > > > U been using Altavista Babelfish on Japanese websites again? > > > > > > > > > > ----- Original Message ----- > > > > > From: "Errol Smith" <[EMAIL PROTECTED]> > > > > > To: <[EMAIL PROTECTED]> > > > > > Sent: Monday, March 29, 2004 3:40 PM > > > > > Subject: RE: factory front toe spec > > > > > > > > > > > > > > > > While it can being the operative as the inside tyre doesnt stay on > the > > > > > deck > > > > > > with any appreciable contact loading very long : ) > > > > > > > > > > > > > > > > > > Cheers > > > > > > Feral Errol > > > > > > www.Datrats.com.au > > > > > > > > > > > > -----Original Message----- > > > > > > From: [EMAIL PROTECTED] > > > > > > [mailto:[EMAIL PROTECTED] Behalf Of Andrew > > > > > > Greenbury > > > > > > Sent: Monday, March 29, 2004 10:26 AM > > > > > > To: [EMAIL PROTECTED] > > > > > > Subject: Re: factory front toe spec > > > > > > > > > > > > > > > > > > Hi Mark, > > > > > > > > > > > > Yeah fair enough - something I just found in a book called "The > Racing > > > > > > & High-Performance Tire" explains "...Static toe-out is common at > the > > > > > > front wheels on racecars... Static toe-out adds slip angle to the > inside > > > > > > tyre and gets that tyre working early in a turn before the weight > > > > > > transfers to the outside tire" ie getting some work from the > inside tyre > > > > > > while it can. > > > > > > > > > > > > Andrew > > > > > > > > > > > > > Andrew, > > > > > > > > > > > > > > I never ran the car with toe-in....but I did run it with zero > toe. > > > > > adding > > > > > > > just 1-2mm of toe out certainly helped the handling - > particularly > > > > > initial > > > > > > > turn in. Somebody did explain this to me......and if my memory > serves > > > > me > > > > > > > correctly, it has something to do with the inside wheel actually > > > > turning > > > > > > > sharper than the outside, therefore assisting the outside wheel > more. > > > > > Even > > > > > > > though the outside wheel takes most of the workload, having the > inside > > > > > > wheel > > > > > > > turning further than normal helps even further. > > > > > > > > > > > > > > That's how I understand it anyway...wether that be right or > wrong I do > > > > > not > > > > > > > know. What I can say is....it was definately better. It felt > batter, > > > > and > > > > > > it > > > > > > > was faster on the stop watch......and that is the main thing > right? > > > > > > > > > > > > > > Cheers, > > > > > > > > > > > > > > Mark. > > > > > > > ----- Original Message ----- > > > > > > > From: "Andrew Greenbury" <[EMAIL PROTECTED]> > > > > > > > To: <[EMAIL PROTECTED]> > > > > > > > Sent: Wednesday, March 24, 2004 10:56 AM > > > > > > > Subject: Re: factory front toe spec > > > > > > > > > > > > > > > > > > > > > > Mark, > > > > > > > > > > > > > > > > On the racecar, how do you find the handling with the toe out, > say > > > > in > > > > > > > > comparison to the same amount of toe in? I would have thought > you'd > > > > > > > > get more grip/better turn in with the toe in, because the more > > > > loaded > > > > > > > > (outside) tyre already has a slip angle at the beginning of > the > > > > > corner? > > > > > > > > (at the expense of the inside tyre) > > > > > > > > > > > > > > > > Interested to hear your thoughts, > > > > > > > > Andrew > > > > > > > > > > > > > > > > > Andrew...... Sounds excessive to me. We only run 1-2mm of > toe out > > > > on > > > > > > > > > the race car. > > > > > > > > > > > > > > > > > > Just checked my workshop manual (Kenneth Ball), it > recommends .3" > > > > > Toe > > > > > > > > > IN. > > > > > > > > > > > > > > > > > > Hope that helps. > > > > > > > > > > > > > > > > > > Mark. > > > > > > > > > > > > > > > > > > ----- Original Message ----- > > > > > > > > > From: "Andrew Greenbury" <[EMAIL PROTECTED]> > > > > > > > > > To: <[EMAIL PROTECTED]> > > > > > > > > > Sent: Tuesday, March 23, 2004 11:36 AM > > > > > > > > > Subject: factory front toe spec > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hi guys, > > > > > > > > > > > > > > > > > > > > I havent got my service manual on me - does anyone know > the spec > > > > > > > > > > for a 1600 front end toe alignment? > > > > > > > > > > > > > > > > > > > > I quickly checked a wheel alignment done on my car with a > tape > > > > > > > > > > measure - its been set at roughly 5mm toe out total, or > approx > > > > > > 0.3deg > > > > > > > > > > toe out per wheel. Any thoughts on if this is excessive?? > > > > > > > > > > > > > > > > > > > > Thanks, > > > > > > > > > > Andrew > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --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]/ ---------------------------------------------------------------------
