That's an old engineering trick that's been around for ages. Its a good technique to determine if a critical structure has any cracks in it. Once the pressure decreases, the engineers will go looking for the cracks and determine if they need fixing or not.
Cheers Daniel Kroehn ----- Original Message ----- From: "tobias walker" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, June 24, 2002 6:47 PM Subject: Re: nitrogen / Claude Rouelle > I wa chatting to a mate whos a pilot some time ago and he said they > pressureize some helicopters frames and have a gauge in it so the know if > there is a crack in it as the pressure drops off > on the race engineer part I was chatting to a family friend the other night > and his son is with jag in the development team and is coming out to the > indy so hopefully I may com myself into a pit pass a meet a few people he > knows in the pits LOL o they used to have a sysstem on the indy cars tyres > to regulate the tyres pressure thogu hthey banned it a few years ago ? > > >From: "Andrew Greenbury" <[EMAIL PROTECTED]> > >Reply-To: [EMAIL PROTECTED] > >To: [EMAIL PROTECTED] > >Subject: Re: nitrogen / Claude Rouelle > >Date: Mon, 24 Jun 2002 14:05:47 +1000 > > > >Nick, > > > > > Andrew, > > > Sounds interesting! > > > Another, less important point is that Nitrogen is 'dry' - contains no > >moisture. > > > >Yep exactly - no moisture means no changes with humidity etc. > > > > > > > > I saw an ad for those seminars, just a bit pricey eh? - unless you > > > work for Motec! Did you learn anything interesting? > > > > > > >Yeah US$750 is a lot of money. It is VERY interesting, but the > >theoretical basis of what he says can be found in various books. A > >lot is also to do with utilising data aquisition systems. Its the little > >stories etc, founded from his experience, which would be valuable > >to a race engineer, and in effect what you are paying for. There is > >no doubting that Claude is an EXTREMELY knowledgable and > >experienced engineer and its ashame there is only time for him to > >share a tiny bit (despite 3x 12 hour days!) > > > >Actually, a few weeks ago I had some one-on-one time with him > >over dinner :) > >Unfortunately, I think he thought I was a dickhead... :( > > > > > Any clues on how to get involved as a race engineer besides... > > > a) Bluff and rat-cunning > > > b) Going O/S. > > > > > > >As with anything, it appears its who you know not what you know :( > > > >Andrew > > > > > > > > > > From: "Andrew Greenbury" <[EMAIL PROTECTED]> > > > > Subject: RE: nitrogen filled tires > > > > Date: 24/06/2002 12:48:34 > > > > To: [EMAIL PROTECTED] > > > > > > > > Yep Errol is correct. I went to one of the racecar dynamics > > > > seminars with Claude Rouelle (ex head race engineer in > > > > F1?/CART/IRL etc etc) and he made the point that the use of > > > > nitrogen in dampers etc was for consistent operation, because > > > > there is no change in expansion/compression with temp. > > > > > > > > Andrew > > > > > > > > > I think you will find its more to do with the rate of expansion per > >degree > > > > > of temp increase. This means your tyres react more predictably with > >temp > > > > > changes. > > > > > > > > > > Cheers > > > > > Feral Errol > > > > > [EMAIL PROTECTED] > > > > > http://www.datrats.com.au/ > > > > > > > > > > -----Original Message----- > > > > > From: [EMAIL PROTECTED] > > > > > [mailto:[EMAIL PROTECTED]]On Behalf Of Jim Little > > > > > Sent: Sunday, 23 June 2002 6:59 PM > > > > > To: [EMAIL PROTECTED] > > > > > Subject: Re: nitrogen filled tires > > > > > > > > > > and aircraft > > > > > > > > > > --- mark krawczuk <[EMAIL PROTECTED]> wrote: > i > > > > > believe that some racing pushbikes use nitrogen > > > > > > in the tyres? > > > > > > > > > > > > mark k > > > > > > ----- Original Message ----- > > > > > > From: "James Cox" <[EMAIL PROTECTED]> > > > > > > To: <[EMAIL PROTECTED]> > > > > > > Sent: Saturday, June 22, 2002 1:32 PM > > > > > > Subject: RE: nitrogen filled tires > > > > > > > > > > > > > > > > > > > Actually I think they do that to maintain a > > > > > > constant tyre pressure since > > > > > > > nitrogen is less likely to expand with heat > > > > > > increases, a common practice > > > > > > in > > > > > > > some forms of motorsport. If he really intended > > > > > > to make the tires lighter > > > > > > > he should have uses helium. > > > > > > > > > > > > > > Jame Cox > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >No > > > > > > > >I have only ever seen a bloke fill his tyres with > > > > > > nitrogen to make them > > > > > > > >lighter, similar to bridge construction (true > > > > > > story) > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > _________________________________________________________________ > > > > > > > Send and receive Hotmail on your mobile device: > > > > > > http://mobile.msn.com > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >--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]/ > > > > > > > > > > > > >--------------------------------------------------------------------- > > > > > > > > > > http://www.sold.com.au - SOLD.com.au > > > > > - Find yourself a bargain! > > > > > > > > > > > > > > > > > > > > > > > > > > > > This message was sent through MyMail http://www.mymail.com.au > > > > > > > > > > > > > > > _________________________________________________________________ > MSN Photos is the easiest way to share and print your photos: > http://photos.msn.com/support/worldwide.aspx > --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]/ ---------------------------------------------------------------------
