[NMCycling] Mari Holden trivia
David Porter via Bike-racers
bike-racers at mailman.swcp.com
Wed Jul 20 14:55:50 MDT 2016
..well my understanding is... that air flow is laminar until about 60MPH
at which point it gets ugly. This from the folks at the old Galles wind
tunnel. After the sand paint, we switched to the 3M tape that was being
used on the hulls of the America Cup sail boats... very unobtrusive and
the UCI inspectors never mentioned any thing about it.. Looked like a
crappy paint job.. The bike frame is pretty insignificant, the wheels
are the culprit..we all know this. Of course the rider remains the sack
of potatoes that creates the most drag..despite "laminar" flow around
the human. So.. the modern materials are likely the key to reducing drag
these days.. IMO
On 7/20/2016 1:36 PM, Cliff Loucks via Bike-racers wrote:
> Unless you’re interested in aerodynamics, pay no attention to the man
> with the keyboard behind the curtain… But Kansas or not, aerodynamics
> are important in bicycle racing.
>
> 60 grit sandpaper:
>
> Craig Denman, did you mean ‘hope of speed’ rather then 'hype of speed’?
>
> The only thing I’d question here is the size of the grit to use. 60
> is fairly coarse but maybe not coarse enough.
>
> In aerodynamics, there’s laminar flow (smooth) and turbulent flow
> (obviously not smooth). Laminar flow rarely happens - in cycling or
> otherwise. The only time I can think of in the world of cycling is
> the wing design on the human powered gossamer condor and gossamer
> albatross - designed to try to maintain laminar flow. Laminar flow
> creates much less drag than turbulent flow. But, the non-intuitive
> thing here is that if flow around an object (like a frame tube) is
> going to go turbulent (which it will), then the sooner it does (as it
> flows around the tube) the less drag it has. This is exactly why golf
> balls have dimples. They fly further and straighter than the early
> versions without the dimples.
>
> grit on the bottom of his shoes too? Probably to aid slowing the bike
> down to a stop since his brakes most likely failed after the one time
> he used them in the ride (the turn-around). Just kidding John.
>
> Does this mean a roadie should trim the front and shave only the hair
> on the back of on his arms and legs? Only if it’s a coasting race. I
> used to win criterium, now I excel at coasting. Come on Paul, meet
> you at the top of Rio Bravo!
>
> Confused? Good. Life gets slow without it. Paul’s life is getting
> faster and faster. HA!
>
> —-Cliff
>
>
> _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
> If brains was lard, Jethro couldn't grease a pan.
> - Jed Clampett
>
> Cliff Loucks
> Albuquerque, New Mexico
> at work: 505-844-9098
> at play: 505-604-1254
>
>
>> On Jul 20, 2016, at 8:28 AM, paul via Bike-racers
>> <bike-racers at mailman.swcp.com <mailto:bike-racers at mailman.swcp.com>>
>> wrote:
>>
>> ...and the alibaba face mask, gigantic spoke protector (disk wheel
>> precursor), Schwinn Ashtabula forks, 12 spokes(?), ...
>>
>> On 07/19/2016 05:26 PM, Craig M. Doolittle via Bike-racers wrote:
>>> And on the bottom of his shoes!
>>> *From:*Bike-racers [mailto:bike-racers-bounces at mailman.swcp.com]*On
>>> Behalf Of*Craig Denman via Bike-racers
>>> *Sent:*Tuesday, July 19, 2016 5:21 PM
>>> *To:*Clay Moseley; Chad Patterson; NM Bike Racers
>>> *Subject:*Re: [NMCycling] Mari Holden trivia
>>>
>>> I remember John Frey's first TT record because I spent so much time
>>> looking at the stenciled 51:57 on the back of his seat tube -- and
>>> recall the 600-grit sandpaper on all of the tube leading edges
>>> placed there for the hype of speed.
>>>
>>> Craig Denman
>>>
>>> On 07/19/2016 03:53 PM, Clay Moseley via Bike-racers wrote:
>>>
>>> John Frey once held the national record at around 52:00 early in
>>> his career with RGRT. I remember when it was still above the
>>> 50:00 mark around 1987 or so, then came the "fast years" from
>>> 1988 to recent. I think Kent was the first one to go sub-50
>>> with his Ten-Speed Drive Guercotti, and within a year he got
>>> that down to 48:44 or so, when Frey did his thing in 1990
>>> (47:35?). On that same day, Kent also went 47:40-something. I
>>> only recall one other person going sub-48 on the Moriarty
>>> course, and that was Colby Pearce with his high-dollar Lotus and
>>> Superman position. In recent years, it seems that the 50:00
>>> minute barrier has become harder to break.
>>> All that being said, I think the Brits were the first ones to
>>> make the 25-mile time trial a famous distance that was focused
>>> on for speed records. Our times compare closely with theirs,
>>> but it wasn't until Boardman came along that the 47-minute
>>> barrier was broken. Then there was a string of them as well.
>>> Anyway, back to your original question, Mari Holden's time is
>>> pretty killer. Many top-level (Pro/Cat-1) men can't time trial
>>> that fast on an equitable course with the same conditions. That
>>> time will stand for a while.
>>> On Tue, Jul 19, 2016 at 2:37 PM, Chad Patterson via Bike-racers
>>> <bike-racers at mailman.swcp.com
>>> <mailto:bike-racers at mailman.swcp.com>> wrote:
>>> Can anyone tell me the last time a 51:36 would've been the
>>> outright winner of Record Challenge? I'm just looking for
>>> something that will illustrate to the average sports fan how
>>> ridiculously fast that is.
>>>
>>> Sent from my iPhone
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>>
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--
Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM
87107 505-352-1378 Go HERE: my world www.porterbikes.com/
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