Sure, that would work. Put a load on the scales to begin with then measure
the difference. Use a pulley system to put the scales outside and suspend
the bike partially with small diameter cables, one at each end of the bike.
If you preload you could also determine any down force differences as well
as lift. But bike wheels are draggy and if yhere is a fender covering them,
no lift due to fender (IMO). And remember everything you put in the tunnel
causes turbulence of some sort which will make the air flow goofy.
mayf
----- Original Message -----
From: "Twin Jugs Cycle" <twinjugsharley@yahoo.com>
To: "DrMayf" <drmayf@teknett.com>; "dad land" <eaglemot@bellsouth.net>;
"landspeedracer" <landspeedracer@msn.com>; "Keith Turk" <kturk@ala.net>;
"Dave Dahlgren" <ddahlgren@snet.net>; <basavage@earthlink.net>;
<rtmack@concentric.net>; <Nt788@aol.com>
Cc: <land-speed@autox.team.net>; <nafzger@vtc.net>; <pork.pie@t-online.de>
Sent: Friday, January 24, 2003 9:23 AM
Subject: Re: home made wind tunnel
> DrMayf > wrote:
> <snip>
> > you need some
> > way the turn the tires at the anticipated speed
> > (tires and wheels have a
> > significant effect on air flow, especially on a
> > bike).
>
> Excellent point!.. bet that plays a big part on lift!?
> if that ever gets worked into the equation maybe some
> giant overhead fish scales can be used for the lift
> differences I was refering to?
>
> <snip>
> > just don't fall off and
> > introduce your self to the fan blade...can ruin your
> > whole day ;^}
>
> Let alone all that pretty hair. :-)
>
> Todd Dross
> Twin Jugs Racing
> #1300b
>
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/// what is needed. It isn't that difficult, folks.
|