Bike Forums - Search Results

Go Back  Bike Forums > Search Forums
Reload this Page >

Search Results

Notices
 
Search: Posts Made By: wphamilton
Showing results 1 to 50 of 1000
Search took 3.74 seconds.
08-08-20, 01:37 PM
Replies: 117
Views: 4,111
Posted By wphamilton

It says that at well above visual threshold, *how...

It says that at well above visual threshold, *how much* a steady light is better than flashing is directly related to the relative intensity. It does *not* say that flashing lights are more visible...
08-08-20, 01:19 PM
Replies: 182
Views: 7,465
Posted By wphamilton

Random selection by you, in that it doesn't help...

Random selection by you, in that it doesn't help to illustrate your eccentric notion of the coefficient of friction.
08-08-20, 06:34 AM
Replies: 182
Views: 7,465
Posted By wphamilton

Seriously? Joking with a random cite? I'm not...

Seriously? Joking with a random cite? I'm not going into it further.
08-07-20, 05:35 AM
Replies: 182
Views: 7,465
Posted By wphamilton

It means that it's a constant. Coefficient of...

It means that it's a constant. Coefficient of Friction is a constant for two materials. In your road tests you will have other variables for road grip: suspension, speed, gravel, lubricants and a...
08-05-20, 12:15 PM
Replies: 26
Views: 728
Posted By wphamilton

Maybe this is just a math problem? If so,...

Maybe this is just a math problem?

If so, you need to keep in mind that the initial kinetic energy of the truck isn't what you need to think about. It's the change in energy of the truck, which...
08-05-20, 12:03 PM
Replies: 22
Views: 838
Posted By wphamilton

Granted, but IMO they sold it pretty well after...

Granted, but IMO they sold it pretty well after getting up. The girlfriend screaming at him at the end, I could see it going down that way as well. I wonder if they produced it as a stunt demo, a...
08-05-20, 11:44 AM
Replies: 182
Views: 7,465
Posted By wphamilton

I sense that there is a fundamental...

I sense that there is a fundamental misunderstanding about what the coefficient of friction really is, so I'm not going into it more than very briefly.

It is an empirical observation only. It is...
08-05-20, 07:19 AM
Replies: 182
Views: 7,465
Posted By wphamilton

Correct, the road grip lost due to tread...

Correct, the road grip lost due to tread deformation is not a factor in the coefficient of friction.

Surface texture and adhesive forces at the micro scale - there are some myths there also that...
08-04-20, 02:29 PM
Replies: 182
Views: 7,465
Posted By wphamilton

The force normal to the surface? Bouncing? ...

The force normal to the surface? Bouncing? Tread deformation? I don't think so.
08-04-20, 02:25 PM
Replies: 22
Views: 838
Posted By wphamilton

I thought it was pretty good acting. Maybe not...

I thought it was pretty good acting. Maybe not scripted all that well. Both walking back to the bikes and the part right after that looked a little weak.
08-04-20, 01:58 PM
Replies: 182
Views: 7,465
Posted By wphamilton

I'd say increases "road grip" rather than...

I'd say increases "road grip" rather than coefficient of friction, since the coefficient of friction is considered to be invariable under these conditions.

Otherwise all spot on as far as I know.
08-04-20, 01:47 PM
Replies: 182
Views: 7,465
Posted By wphamilton

I'm not sure what you mean the wiki link to show....

I'm not sure what you mean the wiki link to show. It doesn't refer to the size of the contact patch. Neither does the discussion on slip angle, if you follow the links in the wiki page.

The...
08-04-20, 09:18 AM
Replies: 117
Views: 4,111
Posted By wphamilton

Reading that more closely, that is not at all the...

Reading that more closely, that is not at all the implication. It's talking about "effective intensity" which is simply the average intensity during the on-off cycle, and stating that the...
08-04-20, 08:47 AM
Replies: 182
Views: 7,465
Posted By wphamilton

Your post was informative and well written so I...

Your post was informative and well written so I don't want to seem deprecative by singling this out but I think it's interesting because it's a common opinion and we are talking about myths after...
08-04-20, 08:14 AM
Replies: 3,089
Views: 301,068
Posted By wphamilton

OK. They're excellent reasons for other cyclists....

OK. They're excellent reasons for other cyclists.



Do you commute in 90° with 80% humidity in the morning? Yes, as soon as you stop, you'll start to sweat and likely profusely. While you're...
08-02-20, 01:54 PM
Replies: 117
Views: 4,111
Posted By wphamilton

It's worth noting that flashing aviation lights...

It's worth noting that flashing aviation lights do not improve visual detection until the intensity is close to the visual threshold (very dim). Otherwise, the steady light is superior for "being...
Forum: Road Cycling
08-02-20, 11:57 AM
Replies: 32
Views: 857
Posted By wphamilton

The extra caution is your adaptation to the whole...

The extra caution is your adaptation to the whole traumatic experience. It's not necessarily something that we have to get over, but if there is an level of confidence that you want to push through...
08-02-20, 11:44 AM
Replies: 182
Views: 7,465
Posted By wphamilton

What changed for me was higher quality larger...

What changed for me was higher quality larger tires got cheaper, or at least the more affordable ones got easier to find. I had gradually dropped from 32 to 20 looking for that extra speed, realized...
08-02-20, 10:04 AM
Replies: 34
Views: 975
Posted By wphamilton

It's good training for the locals in driving...

It's good training for the locals in driving around bicycles. Change lanes to pass when it's clear, just like everyone else.
08-02-20, 09:58 AM
Replies: 95
Views: 5,688
Posted By wphamilton

Yes. No. No one really cares, and people expect...

Yes. No. No one really cares, and people expect us to roll through, so I got over wanting to be perfect with the traffic code at stop signs a long time ago.

I'm not going to blast through in front...
08-02-20, 09:51 AM
Replies: 3,089
Views: 301,068
Posted By wphamilton

I'll do that in three situations, maybe more that...

I'll do that in three situations, maybe more that have slipped my mind.

1. I'm near the end of a commute, stopped at a light in the Summer morning sunshine, and don't want to walk in with a sweaty...
08-02-20, 09:37 AM
Replies: 89
Views: 3,545
Posted By wphamilton

I do -I finally got a really small one, same size...

I do -I finally got a really small one, same size as a CO2 cartridge and pump head, and now have peace of mind about it.

Using CO2 is a piece of cake. Until you mess up, then it's impossible.
08-02-20, 09:31 AM
Replies: 182
Views: 7,465
Posted By wphamilton

That's a lot of discussion so it's probably...

That's a lot of discussion so it's probably already been said but there isn't really a myth about it. Larger diameter wheels have certain benefits for speed in some conditions, with drawbacks in...
08-02-20, 09:13 AM
Replies: 10
Views: 362
Posted By wphamilton

No problem with a slightly small inner tube. ...

No problem with a slightly small inner tube.

Even with too large a tube it still works fine. Air pressure will be equalized regardless of folds and kinks, but if it is folded the crease may...
07-08-20, 08:01 AM
Replies: 178
Views: 8,895
Posted By wphamilton

I think I need one already. Since I'm also slower...

I think I need one already. Since I'm also slower than I was. Fortunately having flexible priorities is considerably cheaper.
07-07-20, 09:08 AM
Replies: 95
Views: 6,233
Posted By wphamilton

I've had good experiences buying bikes, parts and...

I've had good experiences buying bikes, parts and accessories on Amazon. No issues at all, I highly recommend it provided you do some due diligence.

I don't purchase high end however, which is...
07-02-20, 08:30 AM
Replies: 178
Views: 8,895
Posted By wphamilton

I was considering splurging on a CF frame - 2...

I was considering splurging on a CF frame - 2 pounds lighter - if I could lose 5 pounds first. But I gained 5 pounds so I have wider higher quality tires instead.

That really sums it up in a...
06-22-20, 08:47 AM
Replies: 150
Views: 3,624
Posted By wphamilton

I have to take a step back to put these numbers...

I have to take a step back to put these numbers in context, before attempting a statistical analysis.

Initially reported fatality rates in the US were much higher than globally. The most likely...
Forum: Touring
06-17-20, 05:12 AM
Replies: 15
Views: 1,072
Posted By wphamilton

When I used s-hooks, same idea, the bag was...

When I used s-hooks, same idea, the bag was normally secure but once - out of maybe a hundred - one of the hooks did get pushed off the rack somehow. Had I not also belted the bag to the rack stays...
06-15-20, 06:49 PM
Replies: 56
Views: 3,929
Posted By wphamilton

With cycling people starting from a low level of...

With cycling people starting from a low level of conditioning initially experience rapid improvement. That rapid rate of improvement also tapers off quickly. As a result, someone two years from...
06-15-20, 01:28 PM
Replies: 24
Views: 1,857
Posted By wphamilton

I don't think it's that strange. I can't hit my...

I don't think it's that strange. I can't hit my max HR either, even following the guidelines you see everywhere. Warm up, gradually increase hr by 5 beats, hit the hill hard, repeat, that whole...
Forum: Commuting
06-13-20, 06:40 AM
Replies: 480
Views: 18,609
Posted By wphamilton

It makes sense but easier said than done if...

It makes sense but easier said than done if "getting to work" has been your main rationale and motivator. I've had one bike commute since the beginning of covid measures.

I commute to the patio. I...
06-12-20, 05:22 AM
Replies: 188
Views: 12,827
Posted By wphamilton

It could be that those of us who are happy with...

It could be that those of us who are happy with aluminum, the material of the vast majority of bikes sold, simply don't care if carbon fiber is better in some fashion.
05-24-20, 03:55 PM
Replies: 40
Views: 4,265
Posted By wphamilton

​​​​​​ You are laboring under a misconception -...

​​​​​​
You are laboring under a misconception - several. This study does not support your conclusion - the one stated in this title, and the conclusions you posted originally (before your edit). ...
Forum: Road Cycling
05-22-20, 10:18 AM
Replies: 209
Views: 12,681
Posted By wphamilton

I had enjoyed checking my run or ride against my...

I had enjoyed checking my run or ride against my recent and historical performance. Not enough to pay for it though.

I do have Fitbit uploading automatically to Strava, and Golden Cheetah...
05-22-20, 05:38 AM
Replies: 33
Views: 2,098
Posted By wphamilton

I don't see that in the particular study that he...

I don't see that in the particular study that he brought up. It's an estimate based on existing studies/
05-20-20, 03:21 PM
Replies: 40
Views: 4,265
Posted By wphamilton

That particular study isn't difficult to grasp -...

That particular study isn't difficult to grasp - but before you could even begin to suppose that sweating from exercise is the major cause of bone density loss you have to look into both the effect...
05-20-20, 10:44 AM
Replies: 40
Views: 4,265
Posted By wphamilton

Calcium supplements are at least well established...

Calcium supplements are at least well established to improve bone density.

As for your relatively obnoxious first paragraph, I didn't realize that you posted this thread with such a stretch...
05-20-20, 10:10 AM
Replies: 54
Views: 2,172
Posted By wphamilton

The stereotyping and maligning them as addled is...

The stereotyping and maligning them as addled is where she lost me. I wonder if she takes less offense when it's a hybrid bike or family groups weaving around her.

Before she went there, yeah here...
05-20-20, 09:57 AM
Replies: 32
Views: 1,504
Posted By wphamilton

My initial impression is always "why is this jerk...

My initial impression is always "why is this jerk honking at me?" So I can sympathize. A second later I usually think, they're probably not, and who knows it may just be one of those who honk at...
05-20-20, 09:42 AM
Replies: 40
Views: 4,265
Posted By wphamilton

Are you saying that the studies answer my...

Are you saying that the studies answer my questions? You may have to elaborate then because I did read them fairly closely, and that's where the questions started. For example it seems to me to...
05-19-20, 01:46 PM
Replies: 40
Views: 4,265
Posted By wphamilton

I don't mind admitting that I have a knowledge...

I don't mind admitting that I have a knowledge gap keeping me from fully understanding it. I have questions but googling them up raises more questions.

For a "sniff check" we have 5 liters of...
05-19-20, 01:20 PM
Replies: 21
Views: 2,023
Posted By wphamilton

Did anyone come up with specific advice on this...

Did anyone come up with specific advice on this part? I wind up eliminating one or two days of intensity on either running or cycling or both - if I'm not careful it all becomes easy/recovery efforts...
Forum: Commuting
05-18-20, 01:10 PM
Replies: 25
Views: 2,258
Posted By wphamilton

Here's how I did it. Unfortunately, I haven't...

Here's how I did it. Unfortunately, I haven't used it much this year.
Laptop case Quick Release (https://www.bikeforums.net/general-cycling-discussion/1193879-my-road-bike-laptop-carrier.html)
Forum: Commuting
05-14-20, 05:03 PM
Replies: 12
Views: 1,247
Posted By wphamilton

I did about that distance on my road bike for...

I did about that distance on my road bike for 8-10 years, mostly pretty bare-bones setup. I'd say Lights, fenders and a rack and you're good to go.
05-14-20, 11:24 AM
Replies: 14
Views: 720
Posted By wphamilton

So they say (me too sometimes). But every time...

So they say (me too sometimes). But every time you stand on the pedals or shift your position it's 10 pounds less that you're moving than if the 10 pounds were on the bike. It's also 10 pounds less...
Forum: Commuting
05-14-20, 05:26 AM
Replies: 8
Views: 660
Posted By wphamilton

Those covers will help in light rain but your...

Those covers will help in light rain but your lower legs and arms will still get soaked. But light rain isn't the problem right? Wear a water-resistant rain shell, waterproof overshoes. And for...
05-13-20, 05:46 AM
Replies: 14
Views: 991
Posted By wphamilton

I bought mine online (Amazon) in April 2014. I'd...

I bought mine online (Amazon) in April 2014. I'd have no particular concern about clicking "buy again" if I felt like a new one since the expense so far is $3.16 per year and it's not significantly...
05-08-20, 07:39 AM
Replies: 86
Views: 7,175
Posted By wphamilton

Offering expedited service at a price pretty much...

Offering expedited service at a price pretty much fixes that whole issue. If you're reasonably quick anyway - 2 or 3 days plus wait time for a part of necessary - almost nobody will take you up on...
05-07-20, 01:14 PM
Replies: 21
Views: 2,023
Posted By wphamilton

Good form is absolutely important and I don't...

Good form is absolutely important and I don't disagree with anything here. But I am worried that someone starting from scratch almost will try to fix his form, perhaps even his step-rate and running...
Showing results 1 to 50 of 1000
 


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.