You're right as far as aero drag is concerned, but for normally aspirated
engines anyway, they loose their ability to produce power faster than aero
drag goes down. Speed at altitude is definitely more difficult.
I totally agree about the orientation and attitude of the people involved.
I was talking to a work associate this morning about how you guys race for
no money and virtually no recognition just because you love to do it. He
thought speed racers would have the all the factory and commercial sponsors
like NASCAR, and I told him no, and I hoped it would never happen. This may
be the best kept secret in racing!
Dale
-----Original Message-----
From: Marge and/or Dave Thomssen [mailto:mdthom@radiks.net]
Sent: Sunday, January 14, 2001 9:04 AM
To: Land-speed Racers
Subject: Fw: World records
Group
You can tell it is winter by the bench racing taking place on the chat line
recently.Here's my two cents worth.
Wind resistance also reduces in direct proportion of air density. So it
wouldn't make much difference what altitude you were running on-you would
run the same speed except for rolling resistance which does not vary with
altitude, only tire pressure and surface. The rolling resistance factor
would make you run a little or a lot slower at higher altitude, depending on
what proportion of the total drag on your car was due to rolling resistance.
We run at Bonneville because it is the only place in the USA that is long
and flat enough and is accessible in a one to three day tow. Any other
venue in the world does not meet these criteria.
Because there are so few other places to race the records at Bonneville are
legitimate world records. Most of us would award our record to someone who
exceeded it somewhere else in the world because we know the chances of that
ever happening is very low.
The amazing thing about Bonneville is that the best place to race is
operated by VOLUNTEERS. These are racers putting on a race for racers.
This is the best combination that could have ever happened to us
Hot-rodders! I hope everyone understands and appreciates what a wonderful
job these volunteers are doing for us.
Dave the Hayseed
----- Original Message -----
From: Dave Dahlgren <ddahlgren@snet.net>
To: <RAWAWA@aol.com>
Cc: <v4gr@rcn.com>; <land-speed@autox.team.net>
Sent: Sunday, January 14, 2001 4:23 AM
Subject: Re: World records
It's pretty simple as a general rule you lose power in
direct proportion of air density.. If at bonneville you have
95% air density then for every 100 hp at sea level you only
have 85 at Bonneville. BTW if you own an air density gage
(best bet) or use the one at the ERC trailer you can jet
your car with confidence right off the trailer..
Dave
RAWAWA@aol.com wrote:
>
> A while back someone had some believable percentage losses in traction at
> various venues ie; the best was maxton's concrete followed i think by
Mirage
> and Muroc Dirt and the Salt last.... Would any of the Scientists on this
list
> care to guesstimate losses/gains due to altitude,air density,humidity,et
al
> (not So Al). AND,where is this South America 20,000 ft. high Salt lake
> ?.........Bob Wanner
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