As much as anything I think they were tring to keep the air from crawling up
over
the bed sides and into the back of the truck--ie-- it kept it more laminar on
the
sides of the truck. Go look at Dicks's truck some times--he runs water spray of
his
intercooler and it leaves salt tracks down the side of the cab but about the
rear
wheels it climbs up in the back because he runs with no bed cover. The "rocket
ranger" ran a flat top over the bed with a slight straight lip over the
tailgate.
wmts
---- Original Message ----
From: Rick Hammond
Date: Thu 2/7/02 16:40
To: Clay, Dale
Cc: Higginbotham Land Speed Racing, BarkleyAG@aol.com, land-
speed@autox.team.net
Subject: Re: lightning
Clay,
I guess we are mostly dealing with the curl of air from the roof top to either
the bed or bed cover.
With a flat cover you get one square drop there then another square shape at the
back of the tailgate.
Another situation would be having the flat cap with the tailgate down. Would
that maybe ease the flow; could the open area act as a bit of a 'slope'?
I would wonder about vents in the cover, but would that run afoul of the 'no
aerodynamic advantage' rule?
Hmmm...
Cheers,
Rick
"Clay, Dale" wrote:
> I remember some years back there was a factory S10 pickup
> and it had a cover on the rear half of the bed only. Seem to remember
> something in one of the mags about that equalizing the pressure on the
> tailgate somehow.
>
> Dale C.
>
> Subject: Re: lightning
>
> Mike, Skip,
> (Skip, the lightening is an F150 stepside, 5.4L with a
> supercharger. One of the
> mags did a fun comparison between it and a corvette when it
> came out ;-)
> It looks like it would be modified because of the
> supercharger, and it would be
> bumped up two classes in motor to A, so you would be up
> against normally asp. 460s
> etc.
>
> They allow flat box caps, as well as dropped or removed
> tailgates. OK
> aerodynamicists; here's a question; Which option is
> cleaner??
>
> They say covers are allowed as long as they are 'no higher
> than the edge of the
> pickup bed...aftermarket bed caps are allowed but must not
> allow any aerodynamic
> advantage'.
>
> Could your 'tarp or panel' start behind the cab at the top
> of the box and slope
> down to the rear edge of the box? (maybe a few inches ahead
> for a 'lip'?) That's
> my instinctive idea as the cleanest.
> Cheers,
> Rick
> (plain old 4.6l F150)
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