rec.bicycles.tech Google Group

Re: WIND

spams...@spam.eggs (Ben C) — Mon, 23 Nov 2009 08:42:22 UT

Yes, thanks for your help and that of Gennaro. I got similar numbers
when I tried to work this out for myself.
This explains what Jobst is talking about and what I was missing (even
if there's more to wind than that as people have been discussing in
other posts).

Re: WIND

spams...@spam.eggs (Ben C) — Mon, 23 Nov 2009 08:40:19 UT

OK, so using this example, my relative wind of [-30, 20] has a magnitude
of 36kph. So a force of something proportional to 1296 (36*36=1296).
So as a force vector, I could write it [-1078.35, 718.90] (multiplied by
some coefficient to get actual N).
But without the side-wind, my force vector would be [-900, 0] (just

Re: wheel building: uneven tension between inbound and outbound spokes

jbra...@sonic.net (Jobst Brandt) — Mon, 23 Nov 2009 07:28:11 UT

Spoke tension on symmetrical (front) wheels should be identical within
acoustic sensing (plucking spokes with the fingernail). You don't
need a tensiometer for that although it is useful for recording how
tight the wheel was built for a bicycle shop. Once done a few times,
tone is a clear indication of tension, assuming the same thickness

Re: A GUIDE TO GLOBAL WARMING FOR THOSE EDUCATED IN THE UNIVERSITY OF LIFE

(Fred) — Mon, 23 Nov 2009 07:07:39 UT

With Quotefix installed, you can still turn the '>' indenting off and on as you
describe. But without it, you can't turn it on when OE is broken. You can
change the settings all you want, but OE refuses to indent and add the > no
matter what you do. To me, everything else Quotefix offers is fluff ;-).

Re: How you can save fuel and the environment

chalo.col...@gmail.com (Chalo) — Mon, 23 Nov 2009 07:06:12 UT

Please. In a 2000 to 6000 pound car? Not likely.
In fact, according to your formula, a 6000 pound car would use about
575 times as much fuel as a 2000 pound car. That's 110% fuel
consumption to the 66.667 power (The exponent comes from 4000 pounds
difference divided by 60 pounds per 10% increase).

Re: WIND

carlfo...@comcast.net — Mon, 23 Nov 2009 06:56:13 UT

On Sun, 22 Nov 2009 20:41:02 -0800 (PST), Ron <ron.r.geo...@gmail.com>
wrote:
Dear Ron,
Figure 4.6 is the photo of the chest-level Campbell wrap-around
fairing.
Figure 4.7 is the drawing of the Windfoiler see-through face-high
front-only fairing
Figure 4.8 is the vertical series of diagrams and partial drag

Re: A GUIDE TO GLOBAL WARMING FOR THOSE EDUCATED IN THE UNIVERSITY OF LIFE

(Fred) — Mon, 23 Nov 2009 06:40:40 UT

I'm delighted to discover how AWESOME you are, Dan! Get back to me
when you get over yourself! Or should I have said, if. . .
Fred

Re: WIND

zzyzx.xy...@gmail.com (pm) — Mon, 23 Nov 2009 06:37:42 UT

The vector certainly does capture one reason why side winds are worse
than still air. What you're missing here is that the force from wind
is nonlinear in terms of the wind velocity. Wind resistance scales
with the square of relative air velocity for the ranges of speeds
we're talking about. So take your example. Going 30 kmh in still air,

Re: wheel building: uneven tension between inbound and outbound spokes

j...@cox.net (JG) — Mon, 23 Nov 2009 06:08:42 UT

Of course one set of spokes will have more tension than the other.
They come from slightly different angles due to the crossing.

Re: News in the world of Global Warming

landot...@gmail.com (landotter) — Mon, 23 Nov 2009 05:59:49 UT

There is no evidence to support this claim.
And here we go again, the cocksuckers love to play the victim in lieu
of having evidence for their hysterical emotionalism.
moo.

Re: News in the world of Global Warming

danover...@gmail.com (Dan O) — Mon, 23 Nov 2009 05:50:47 UT

"... ideologically driven... "?

Re: A GUIDE TO GLOBAL WARMING FOR THOSE EDUCATED IN THE UNIVERSITY OF LIFE

danover...@gmail.com (Dan O) — Mon, 23 Nov 2009 05:49:58 UT

The mere fact that you would use Outlook Express at all says enough.

Re: I'm On Twitter! Follow Velo Pollinations...

datak...@yahoo.com (datakoll) — Mon, 23 Nov 2009 05:43:45 UT

POTD
[link]

Re: I'm On Twitter! Follow Velo Pollinations...

so...@noyb.com (Bill Sornson) — Mon, 23 Nov 2009 04:43:51 UT

POTD!

Re: WIND

ron.r.geo...@gmail.com (Ron) — Mon, 23 Nov 2009 04:41:02 UT

Carl,
Where is figure 4.8 in the picture? Interesting, thanks for sharing.
-Ron
[link]