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#31
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helmet ventilation?
In article ,
"C.J.Patten" wrote: "(PeteCresswell)" wrote in message ... Per Ron Hardin: t's a 1975 Bell mushroom helmet, a pleasant sun-reflecting white with rigid white styrofoam insulation, so it takes off all the radiative solar heat. That's a huge benefit. Riding without it is much hotter, very noticeable. Now you've got me thinking it's the color. Mine's a dark-ish grey. Maybe a little strategically-applied spray paint... Better yet, get some aluminum foil. It's easy to mold and with a bit of 3M spray tack, you can stick it to the helmet. An added plus: aliens won't be able to read your thoughts anymore. A fine attempt at misinformation. The aluminum foil is to block the secret government mind control signals. -- Michael Press |
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#32
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helmet ventilation?
On Thu, 14 Jul 2005 11:58:53 -0700, John wrote:
Oh, /that/ sort of fan. As you were, then... Wow...."As you were" ...I haven't heard that expression since Camp Pendleton! As Guy is too young for National Service (aka compulsory call-up) it probably means that he, like me, went to a grammar (high) school with a compulsory army cadet force (CCF). Mike |
#33
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helmet ventilation?
I googled around and found that you can get the article from
http://dx.doi.org/10.1046/j.1460-2687.2000.00053.x. Unfortunately you have to pay for it... It was also published in the Jan/Feb 2001 Bicycling Australia if you can find a copy of that. Nick "C.J.Patten" wrote in message ... Well heck, that's a tease! I gotta find that study! Thanks for that though... good to know. "Nick Payne" wrote in message ... Someone at RMIT published research on this in Bicycling Australia a couple of years back. Can't remember the exact details, but I think they stuck temperature sensors in/on a headform, heated it, then blew air across and measured the rate of cooling with various helmets (and also with no helmet as a comparison). There was no correlation between price and and how well the helmet allowed cooling to take place. Some of the cheap helmets with what appeared to be poor ventilation were near the top of the list and some of the expensive ones which were mostly slots were near the bottom. And the best of the helmets allowed cooling as rapidly as a bare head. Nick "C.J.Patten" wrote in message ... I won't get in to a helmet debate. I wear one, reasons irrelevant for this thread. My question has to do with vents. My current helmet is a Giro Indicator. This wasn't an expensive helmet but it fits well. When you spend 5 times as much to get something like a Giro Atmos (i gather they use it on the tour?) is the ventilation that much better? Would you notice your head staying that much cooler? |
#34
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helmet ventilation?
On Thu, 14 Jul 2005 21:40:58 +0100, Mike Causer
wrote: Oh, /that/ sort of fan. As you were, then... Wow...."As you were" ...I haven't heard that expression since Camp Pendleton! As Guy is too young for National Service (aka compulsory call-up) it probably means that he, like me, went to a grammar (high) school with a compulsory army cadet force (CCF). Actually I went to a 1,000+ year old public school (that's Brit-speak for a private school) which had an /optional/ combined cadet force (CCF) which I did not join. I was an officer cadet for a short while at University but failed medical due to asthma. This disability means I find it hard to maintain an average speed of over 20mph for more than a couple of hours when riding solo on open roads. I have no idea where I got the phrase from, possibly my father (who was in the RAF) or maybe it's just one of those British phrases you pick up in books. Guy -- http://www.chapmancentral.co.uk "Let’s have a moment of silence for all those Americans who are stuck in traffic on their way to the gym to ride the stationary bicycle." - Earl Blumenauer |
#35
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helmet ventilation?
J Actually I went to a 1,000+ year old public school (that's Brit-speak for a private school) which had an /optional/ combined cadet force (CCF) which I did not join. I was an officer cadet for a short while at University but failed medical due to asthma. This disability means I find it hard to maintain an average speed of over 20mph for more than a couple of hours when riding solo on open roads. I have no idea where I got the phrase from, possibly my father (who was in the RAF) or maybe it's just one of those British phrases you pick up in books. Guy -- It's a standard military phase meaning "disregard my last command" or something similar. I heard it used many times in the USMC, but that was 40 years ago. Don't hear it much in the civilian world. Sorry about the asthma holding you back on your faster rides. My lungs are fine, it's the years that have taken their toll. Can't do much about that, except train harder. John |
#36
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helmet ventilation?
On Fri, 15 Jul 2005 09:18:32 +0100, "Just zis Guy, you know?"
wrote: Actually I went to a 1,000+ year old public school (that's Brit-speak for a private school) Which school managed that feat? I don't even know of any universities anywhere that are more than a millennium old (Googling, though, there is one that just barely qualifies: Al-Azhar in Cairo, Egypt, has been operating since 969 AD, and 2 of them in India that predate that one by some bit). Hmmm.. The only pre-1000 AD schools I can find in Britain a The King's School, Canterbury (597) King's School, Rochester (604) St Peter's, York (627) Warwick School (914?) St Albans School (948) King's School, Ely (970) [the next one is listed as 1096, do not even close to 1000 years old] I would guess you attended one of the latter two, unless it was one not on the list for some reason? Jasper |
#37
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helmet ventilation?
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#38
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helmet ventilation?
I submit that on or about Sun, 31 Jul 2005 04:20:36 GMT, the person
known to the court as Jasper Janssen made a statement in Your Honour's bundle) to the following effect: Which school managed that feat? I don't even know of any universities anywhere that are more than a millennium old (Googling, though, there is one that just barely qualifies: Al-Azhar in Cairo, Egypt, has been operating since 969 AD, and 2 of them in India that predate that one by some bit). Hmmm.. The only pre-1000 AD schools I can find in Britain a The King's School, Canterbury (597) King's School, Rochester (604) St Peter's, York (627) Warwick School (914?) St Albans School (948) ^^^^^^^^^^^^^^^^^^^^^^ That's the one. King's School, Ely (970) [the next one is listed as 1096, do not even close to 1000 years old] I would guess you attended one of the latter two, unless it was one not on the list for some reason? St Albans School, Abbey Gateway, Romeland, St Albans, Herts. One of the school buildings dates from the 12th Century, allegedly. I'm pretty sure my history teacher was there from the outset... Guy -- May contain traces of irony. Contents liable to settle after posting. http://www.chapmancentral.co.uk 85% of helmet statistics are made up, 69% of them at CHS, Puget Sound |
#39
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helmet ventilation?
On Sun, 31 Jul 2005 08:44:52 +0100, "Just zis Guy, you know?"
wrote: I submit that on or about Sun, 31 Jul 2005 04:20:36 GMT, the person known to the court as Jasper Janssen made a statement in Your Honour's bundle) to the following effect: St Albans School (948) St Albans School, Abbey Gateway, Romeland, St Albans, Herts. One of the school buildings dates from the 12th Century, allegedly. Most buildings from the 12th century don't have much more than a few walls and a ground plan left original (not all, just most), so it's quite possible even if it looks like a late-medieval or even 17th century building on the outside. Anyway: Neat. I'm pretty sure my history teacher was there from the outset... How very Harry Potter. Jasper |
#40
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helmet ventilation?
I submit that on or about Sun, 31 Jul 2005 17:38:36 GMT, the person
known to the court as Jasper Janssen made a statement in Your Honour's bundle) to the following effect: St Albans School, Abbey Gateway, Romeland, St Albans, Herts. One of the school buildings dates from the 12th Century, allegedly. Most buildings from the 12th century don't have much more than a few walls and a ground plan left original (not all, just most), so it's quite possible even if it looks like a late-medieval or even 17th century building on the outside. The school "chapel" was started in 1077, took some years to complete, bits fell down, other bits were built, but some of the original still exists. http://www.stalbanscathedral.org.uk/ Here's the gateway building, part of the school: http://en.wikipedia.org/wiki/St_Albans_Abbey Guy -- May contain traces of irony. Contents liable to settle after posting. http://www.chapmancentral.co.uk 85% of helmet statistics are made up, 69% of them at CHS, Puget Sound |
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