Cars are more complicated? WOW!!!! Wind shear, tip stalls, angles of attack, dihedral, airfoils, and host of other things I'm sure I know nothing about... Not to mention if you get it wrong the thing crashes and kills people, get wrong in a car and you have lots of drag or an ill handling car, maybe it crashes, but you have a better chance... CR
Chuck Voboril <[EMAIL PROTECTED]> wrote: Chris, not really ture. Aircraft designs are indeed done in CAD, simulated with CFD and then scale models as well as flight tests are used to evolve the design. Sometimes the CFD leads to designs that don't work out.. I reckon that aircraft are actually quite staight forward and easier to design than race cars operatring in a combo of free air, rotating tires, open cockpits, and ground effects. Dave, the James's used linear pots to measured suspension deflection with a data recorder. A long process of cut and try, cut and try at the track. Chuck >From: Chris Reinhardt >Reply-To: [email protected] >To: [email protected] >Subject: Re: [F500] new body for KBS and Q-cars >Date: Fri, 9 Feb 2007 16:04:27 -0800 (PST) > > Chuck, I know that they can and do design entire aircraft without using >wind tunnels, I'm sure that with the software out now, they can design and >test race car bodies. > > CR > >Dave Craddock wrote: > Chuck ,you obviously know Ted James,he and Nancy are most acomplished >racers,I'm curious how he measured the results he got? >Dave Craddock >----- Original Message ----- >From: "Chuck Voboril" >To: >Sent: Friday, February 09, 2007 5:51 PM >Subject: Re: [F500] new body for KBS and Q-cars > > > > Chris, > > CFD is still in its infancy. Honest. > > CFD only gives you clues about portions of a car shape. > > > > One has to go back and forth between track measurements and CFD CAD > > modeling to get it fairly right. > > and if you have the resources, between wind tunnel tests, too. > > Wind tunnel work will still probably get a company to an optimum design > > far before someone w/out one whoonly has CFD. > > New wind tunnels are still being built. > > > > As an example-Ted James, who bought the latest Stohr WF-1, has >discovered > > it makes less measured DF than his old AMAC that he had tweaked and > > tweaked upon for years. > > > > > > Chuck > > > > > > > > > > > >>From: Chris Reinhardt > >>Reply-To: [email protected] > >>To: [email protected] > >>Subject: Re: [F500] new body for KBS and Q-cars > >>Date: Fri, 9 Feb 2007 14:32:56 -0800 (PST) > >> > >> Chuck, if you have some really good fluid dynamics software, there's no > >> need for a wind tunnel, Lee does... > >> > >> CR > >> > >>Chuck Voboril wrote: > >> I might add that the dominant Stohr DSR's have never seen the inside of > >> a > >>wind tunnel either. > >>This F500 design passes the aero "eyeball" test as well as any. > >> > >> > >>Chuck Voboril > >> > >> > >> > >>--------------------------------- > >>Expecting? Get great news right away with email Auto-Check. > >>Try the Yahoo! Mail Beta. > > > >--------------------------------- >Be a PS3 game guru. >Get your game face on with the latest PS3 news and previews at Yahoo! >Games. --------------------------------- Finding fabulous fares is fun. Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains. ________________________________ FormulaCar Magazine - A Proud Supporter of Formula 500 The Official Publication of Junior Formula Car Racing Subscribe Today! www.formulacarmag.com or 519-624-2003 _________________________________ _______________________________________________ F500 mailing list - [email protected] To unsubscribe or change options please visit: http://f500.org/mailman/listinfo/f500 *** Please, DO NOT send unsubscribe requests to the mailing list! ***
