land-speed
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RE: Weight distribution?

To: "Skip Higginbotham" <saltrat@lubricationdynamics.com>,
Subject: RE: Weight distribution?
From: "Dave Dahlgren" <ddahlgren@snet.net>
Date: Sat, 17 Jul 2004 08:23:09 -0400
How do you find said center of pressure? wouldn't it change dynamically with
speed? or do you just hang something out in the wind to make sure it is
behind the CG? If so that seems counter productive to going fast. Or do you
make some assumptions about the largest cross section having to be the
center or pressure. If so that seems a little shakey as i would think the
center of pressure would have to have the most drag and IE. if you deploy
the chute the canopy is the center of pressure, but in cases other than that
the largest cross section might be a very slippery one as well.

Dave (time for more transucers ) Dahlgren

> -----Original Message-----
> From: owner-land-speed@autox.team.net
> [mailto:owner-land-speed@autox.team.net]On Behalf Of Skip Higginbotham
> Sent: Friday, July 16, 2004 7:20 PM
> To: paul bland; lsr
> Subject: Re: Weight distribution?
>
>
> Paul,
> I look at it like this:
> 4wd......50% front and rear, adjust the cp to give you a foot or
> so separation.
> rearwd......40% front and 60% rear, and adjust the cp accordingly
> frontwd...put as much weight up front as possible to aid traction....the
> rest will follow along.
> Skip (40% front/60% rear and about a foot separation)
>
>
>
>
> At 03:18 PM 7/16/04 +0100, paul bland wrote:
> >List, when planning the weight distribution in a liner what percentage
> >front/rear would you go for? I'm well aware of the "separating
> the centre off
> >gravity from the centre of pressure" theory, but by how much?
> surely there's a
> >more scientific approach than just separating it as much as
> possible, how much
> >weight do we need to retain in the rear for traction?
> >Paul, in the UK where the sun has finally put in an appearance.






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