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Heine on inflation
https://janheine.wordpress.com/
-- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
Heine on inflation
On Thursday, March 10, 2016 at 8:03:29 AM UTC-5, AMuzi wrote:
https://janheine.wordpress.com/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 super ! reinventing the belted auto tire... measuring vibrations ? forward backwards downwards or upwards ? in Latvian or Basque ? claiming 'vibrations' counter forward motions/pavement irregularities that multiple irregularities n those depths encountered wit soft pressures are faster than not encounted with higher pressure ... because h pressure 'vibrations' equalize the depth impacts. lower pressure vibrations are absorbed but do not lose heat, heat is stored for more forward movement in the softer rubber ? best call Jeffo ........... is this real or science jello ? |
Heine on inflation
On Thursday, March 10, 2016 at 5:53:42 AM UTC-8, wrote:
On Thursday, March 10, 2016 at 8:03:29 AM UTC-5, AMuzi wrote: https://janheine.wordpress.com/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 super ! reinventing the belted auto tire... measuring vibrations ? forward backwards downwards or upwards ? in Latvian or Basque ? claiming 'vibrations' counter forward motions/pavement irregularities that multiple irregularities n those depths encountered wit soft pressures are faster than not encounted with higher pressure ... because h pressure 'vibrations' equalize the depth impacts. lower pressure vibrations are absorbed but do not lose heat, heat is stored for more forward movement in the softer rubber ? best call Jeffo .......... is this real or science jello ? I like the pictures. -- Jay Beattie. |
Heine on inflation
On 3/10/2016 9:53 AM, jbeattie wrote:
I like the pictures. In the next post down the page, the photo with the Bald Eagle is pretty amazing! -- - Frank Krygowski |
Heine on inflation
On Thursday, March 10, 2016 at 8:53:06 AM UTC-6, jbeattie wrote:
I like the pictures. -- Jay Beattie. Yes for scenery they are nice pictures. But the people in the pictures were odd. First picture you have a group of riders. Some wearing that evil lycra fabric. Racing jerseys. And one guy wearing jeans with a belt? Who rides in jeans and a belt? Oddly everyone was wearing a helmet. I thought this Heine guy was one of the free love, peace, anti nuclear, anti helmet people. And a picture below you have two guys with Grizzly Adams beards and handlebar bags bigger than suitcases. Were they going on a week long ride and needed to carry all their gear? And a few pictures lower we have two riders on the road and the bald eagle in front of them. And one of the riders is on the wrong side of the double yellow line. I know the people on this forum advocate taking the lane and riding as far from the edge of the road as possible. But to actually cross the yellow line and ride in the oncoming traffic lane? Apparently they have different rules of the road in Seattle. |
Heine on inflation
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Heine on inflation
On 3/10/2016 5:03 AM, AMuzi wrote:
https://janheine.wordpress.com/ Good article, it dispels the myth that tire pressure doesn't matter and that the sidewall will support the tire regardless of the pressure. What is not really true, in many cases, is that the reduced rolling resistance of higher pressure tires is offset by vibration losses. If the bicycle has suspension, then these vibration losses are not present. And of course on smooth roads, the vibration losses are minimal even without suspension. For example, my Dahon and my Bromptons both have suspension to reduce vibration transmitted to the rider, an especially important feature on smaller-wheeled bicycles. A great many hybrids and sport touring bikes also have some sort of suspension, a suspension fork and/or a suspension seat post, and of course nearly every mountain bike sold these days has suspension. |
Heine on inflation
On 3/10/2016 11:35 AM, wrote:
On Thursday, March 10, 2016 at 8:53:06 AM UTC-6, jbeattie wrote: I like the pictures. -- Jay Beattie. Yes for scenery they are nice pictures. But the people in the pictures were odd. First picture you have a group of riders. Some wearing that evil lycra fabric. Racing jerseys. And one guy wearing jeans with a belt? Who rides in jeans and a belt? Well, there are different types of cyclists. IME, most cycling enthusiasts don't mind riding with folks that lack the "full mating plumage." (The exceptions are some of the racing clubs.) I don't think those pants are blue jeans. They're probably the knickers sold by Heine's company: https://www.compasscycle.com/shop/co...knickers-2016/ Oddly everyone was wearing a helmet. I thought this Heine guy was one of the free love, peace, anti nuclear, anti helmet people. Well, here's his blog post on the Helmet Wars: https://janheine.wordpress.com/2014/...ing-the-point/ He's not unlike many Americans who were former True Believers, but then began looking deeper into the issue and relevant data. A) He now thinks helmets are greatly oversold, and certainly not worth mandating. B) He still wears one almost all the time. This is common, to a degree that amazes me. It's not at all uncommon to have people argue vociferously against helmets, but say something like "But I still wear one every time I ride." In some cases, they append a statement like "... but only to prevent minor bumps." In Jan Heine's case, the magazine shows him wearing a helmet in every riding photo taken in North America. But in the photos of his riding in Europe or Japan, he's usually bareheaded or in a cotton cycling cap, especially if he's riding with locals. Unlike Mr. Scharf, I don't think that North America is above some danger threshold that makes a helmet necessary. I think that the helmet propaganda campaign first took hold among bike club people, and they've repeated the "helmet = safety" mantra so often that they can't ditch the concept. And because of that, there's significant social pressure to keep that hat as part of the uniform. Those showing up without a helmet may have to spend their ride justifying their decision against unpleasant arguments. And a picture below you have two guys with Grizzly Adams beards and handlebar bags bigger than suitcases. Were they going on a week long ride and needed to carry all their gear? I'm not sure. Some of the magazine's articles have featured long rides into remote areas, including spartan campouts. Others have featured speed competitions between bikes intended for delivery work. (!) Personally, I don't ride with a handlebar bag that size. Mine's only about half that size, so I supplement it with a huge Carradice saddlebag. :-) http://www.carradice.co.uk/index.php...roduct_id=4 3 And a few pictures lower we have two riders on the road and the bald eagle in front of them. And one of the riders is on the wrong side of the double yellow line. I know the people on this forum advocate taking the lane and riding as far from the edge of the road as possible. But to actually cross the yellow line and ride in the oncoming traffic lane? Apparently they have different rules of the road in Seattle. The caption states that they came upon the eagle sitting at the roadside. I assume they moved left to avoid a possible collision. The road ahead is clear; and contrary to popular belief, it is legal to cross a yellow line to avoid a hazard, as long as it can be done safely. In my state (and some others) motorists are specifically permitted to cross a yellow line to pass a slow cyclist or other slow vehicle. -- - Frank Krygowski |
Heine on inflation
Frank ok Frank fessup, how are you reading Heine's conclusion ?
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Heine on inflation
On 2016-03-10 09:08, sms wrote:
On 3/10/2016 5:03 AM, AMuzi wrote: https://janheine.wordpress.com/ Good article, it dispels the myth that tire pressure doesn't matter and that the sidewall will support the tire regardless of the pressure. However, there is stuff in there that I disagree with. What is not really true, in many cases, is that the reduced rolling resistance of higher pressure tires is offset by vibration losses. If the bicycle has suspension, then these vibration losses are not present. Not really. My full suspension MTB vibrates like crazy on some sections of trail. This is because you have to run with fairly high pressure in the shocks for the other more gnarly secitions so you won't bottom out. And of course on smooth roads, the vibration losses are minimal even without suspension. For example, my Dahon and my Bromptons both have suspension to reduce vibration transmitted to the rider, an especially important feature on smaller-wheeled bicycles. A great many hybrids and sport touring bikes also have some sort of suspension, a suspension fork and/or a suspension seat post, and of course nearly every mountain bike sold these days has suspension. This is the kind of vibration I have on just about every MTB ride (movie is by another rider but same area): https://www.youtube.com/watch?v=l5cjAW_nrl4 It can be so bad that after an hour of this the wrists hurt a bit at night. Something considered "normal" by local MTB riders. It is also a good test for newly designed electronics which I have strapped to the bike for that purpose. -- Regards, Joerg http://www.analogconsultants.com/ |
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