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Search: Posts Made By: wphamilton
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03-01-21, 01:56 PM
Replies: 3,267
Views: 323,531
Posted By wphamilton

Close enough, no argument from me. I involve...

Close enough, no argument from me. I involve myself here mainly just to provide objective facts and reason, as much as I'm able, and people are going to make up their own minds about what to do with...
02-28-21, 08:47 AM
Replies: 62
Views: 1,625
Posted By wphamilton

This pretty much, plus running is a more intense...

This pretty much, plus running is a more intense exercise for a given time. That makes it harder in my opinion.
02-28-21, 07:13 AM
Replies: 62
Views: 1,625
Posted By wphamilton

Eh? If you want to argue, I'm not interested. I...

Eh? If you want to argue, I'm not interested. I wish you good luck with your 200 gear inch energy multiplier.
02-28-21, 06:25 AM
Replies: 62
Views: 1,625
Posted By wphamilton

it's almost entirely your position on the two...

it's almost entirely your position on the two bikes, and how you've adapted to riding them.[/color]



Nothing is wrong with physics, when it's real physics. I'm sorry, but what you're presenting...
02-27-21, 02:36 PM
Replies: 62
Views: 1,625
Posted By wphamilton

We don't call it a flywheel when the rotational...

We don't call it a flywheel when the rotational inertia is insignificant. The linear momentum comes from you forcing the wheel around - the opposite effect of a flywheel.

I don't mean to pick,...
02-26-21, 07:20 AM
Replies: 62
Views: 1,625
Posted By wphamilton

Interesting. I'd say there is no flywheel energy...

Interesting. I'd say there is no flywheel energy capture though, other from than the relatively insignificant rotational inertia of the wheels and crank, and all of the energy "returned" is from the...
02-25-21, 12:29 PM
Replies: 62
Views: 1,625
Posted By wphamilton

I get what you mean. You probably shouldn't use...

I get what you mean. You probably shouldn't use the word inertia or inertia-free to describe it, since to a purist inertia is moving both bikes.
02-25-21, 07:03 AM
Replies: 62
Views: 1,625
Posted By wphamilton

For me running is much harder than cycling....

For me running is much harder than cycling. Partly may be due to age, since I don't really have a recovery-zone running pace. If I'm running at all, the heart rate climbs right past. Something also...
02-25-21, 06:58 AM
Replies: 62
Views: 1,625
Posted By wphamilton

It's not clear what you mean by "non-inertia...

It's not clear what you mean by "non-inertia ride". Explain in non-physics terms?
02-24-21, 01:12 PM
Replies: 44
Views: 1,308
Posted By wphamilton

The main factor is how eccentric and idiocentric...

The main factor is how eccentric and idiocentric the target demographic is.
02-17-21, 07:08 AM
Replies: 38
Views: 811
Posted By wphamilton

It's cold here to, 43° in Georgia this morning....

It's cold here to, 43° in Georgia this morning. When it warms up, if the sun is out, I'll be able to get to the bike maintenance safely. That unrotated shift cable is gnawing at me, and I really...
02-16-21, 11:37 PM
Replies: 38
Views: 811
Posted By wphamilton

buy new gloves (although normally I harvest them...

buy new gloves (although normally I harvest them off the regular route early in the season :o)
New shades.
02-15-21, 05:44 PM
Replies: 38
Views: 811
Posted By wphamilton

Two questions: Should I rotate the cable...

Two questions:

Should I rotate the cable housings 180° to put the weathered side in?
Do serious cyclists pull the mask up, or down, for the quick snot rocket?

Replace air: but my tires now...
02-15-21, 05:38 PM
Replies: 38
Views: 811
Posted By wphamilton

Apparently they all already knew how to ramp back...

Apparently they all already knew how to ramp back up from the winter. Some of us have never experienced that before.
02-15-21, 05:29 PM
Replies: 38
Views: 811
Posted By wphamilton

You mean with a split second of bird during the...

You mean with a split second of bird during the second rotation of the bidon? That's another one I flat out never would have thought of. Thanks. I can see that being useful in personal commentary as...
02-15-21, 05:18 PM
Replies: 38
Views: 811
Posted By wphamilton

Good suggestions: Polish spokes - check ...

Good suggestions:

Polish spokes - check
Little bar bag - check

mysterious contents that no one ever sees, TBD

HTFU - of course!
Measure socks - got that covered. All socks are...
02-15-21, 04:56 PM
Replies: 38
Views: 811
Posted By wphamilton

Clearly I'm not real enough for a smart trainer. ...

Clearly I'm not real enough for a smart trainer. Or smart enough for a real trainer as the case may be. I'll settle for a hard minute of vigorous calisthenics to pound watts, every other day since...
02-15-21, 09:50 AM
Replies: 38
Views: 811
Posted By wphamilton

Oh now I have another question. Sorry. I'm...

Oh now I have another question. Sorry. I'm getting on in years, and it just now hit me, what if I'm just a tad tighter in the legs that I was last fall? Do you risk injury after a winter layoff by...
02-15-21, 09:43 AM
Replies: 38
Views: 811
Posted By wphamilton

Do we practice the bidon flip now, or should that...

Do we practice the bidon flip now, or should that wait for warmer weather? I don't want to fumble any bidons, but then again I'd feel foolish if I'm flipping them out of season.
02-15-21, 09:41 AM
Replies: 38
Views: 811
Posted By wphamilton

See that's why I asked - I didn't even think...

See that's why I asked - I didn't even think about that. I'd better start with rim brakes at first, don't want to risk cutting off any limbs from being out of practice.
02-15-21, 09:33 AM
Replies: 38
Views: 811
Posted By wphamilton

Getting ready for Spring

Since my commute changed from 8 miles to 20 feet, I haven't been out riding for weeks. Maybe longer. This is the first winter that I ever skipped as a bike rider, so I'm a newbie at getting ready for...
02-14-21, 10:32 AM
Replies: 164
Views: 8,989
Posted By wphamilton

Zombie thread which I didn't notice when...

Zombie thread which I didn't notice when replying.

--------------------------------------------
Some advice, get some basic tools (not expensive ones) and self-teach maintenance and adjustments....
02-14-21, 10:20 AM
Replies: 81
Views: 2,825
Posted By wphamilton

I'd love to but I don't have a garage or empty...

I'd love to but I don't have a garage or empty room, and the gym is still spawning 'rona. I know, "get some dumbbells" but that's so inconvenient.
02-13-21, 04:48 PM
Replies: 41
Views: 2,461
Posted By wphamilton

It depends on the crash, and your reaction speed...

It depends on the crash, and your reaction speed and muscle memory. I once ended up without a scratch after flying over 200 feet at 60+ mph (motorcycle wreck), because I did everything right in the...
02-08-21, 07:10 AM
Replies: 16
Views: 575
Posted By wphamilton

It is "normal" in certain areas because the GPS...

It is "normal" in certain areas because the GPS can be inaccurate due to local conditions. I have a route where I'll see that about half the time. Other times it's not so pronounced, but still...
02-05-21, 05:03 PM
Replies: 123
Views: 3,727
Posted By wphamilton

[/i] well obviously. I am advising correct...

[/i]
well obviously. I am advising correct methodology, not a methodology that would make one hypothesis look better.


Nobody asked you to repeat any tests. You wanted to know why someone...
02-05-21, 12:38 PM
Replies: 123
Views: 3,727
Posted By wphamilton

As I said, I'm not implying anything about your...

As I said, I'm not implying anything about your data.


The equipment could change. The road could change.


All routes within a set should be the same. Don't cherry-pick the type of route...
02-05-21, 11:31 AM
Replies: 123
Views: 3,727
Posted By wphamilton

GPS software performs smoothing on the raw speed...

GPS software performs smoothing on the raw speed data to mitigate suspicious jumps. Smoothing is basically a weighted average over a period of several seconds. Probably over a longer period if the...
02-05-21, 11:15 AM
Replies: 123
Views: 3,727
Posted By wphamilton

Not to imply anything about TC's data, but it...

Not to imply anything about TC's data, but it reminds me that having suggested it I'm obligated to say something about methodology.

Make sure you're not selecting among the different rides. Use...
02-03-21, 11:05 AM
Replies: 3,267
Views: 323,531
Posted By wphamilton

Why is the thread dead? Did everyone decide to...

Why is the thread dead? Did everyone decide to agree?

Mods, I guess you can unsticky and close this now :)
02-03-21, 06:09 AM
Replies: 123
Views: 3,727
Posted By wphamilton

You're talking about 2 different things. He...

You're talking about 2 different things. He means (multipath) errors due to the different paths a GPS signal might take from satellites. There are various smoothing algorithms to deal with those...
02-01-21, 01:20 PM
Replies: 123
Views: 3,727
Posted By wphamilton

I would agree with that. except that the errors...

I would agree with that. except that the errors that I'm referring to are the path deviations from a smooth path, which the GPS doesn't measure at all. Those will accumulate linearly.

The other...
02-01-21, 08:50 AM
Replies: 123
Views: 3,727
Posted By wphamilton

I think yes, it does double the error with double...

I think yes, it does double the error with double the distance when you use GPS only. GPS smooths the small curving path into more straight lines. That does add up linearly with distance. I'm...
01-30-21, 08:19 AM
Replies: 123
Views: 3,727
Posted By wphamilton

This is what I thought your reasoning would be,...

This is what I thought your reasoning would be, but I didn't want just assume it. It's a mistake IMO. Distance actually travelled is the length of the actual path, not the difference between the end...
01-27-21, 11:41 PM
Replies: 123
Views: 3,727
Posted By wphamilton

Not true IMO. The speed sensor is the same...

Not true IMO. The speed sensor is the same hardware as a wired bike computer, and you're probably thinking that it's only used for measuring instantaneous speed and the GPS is used for overall...
Forum: Commuting
01-22-21, 12:10 PM
Replies: 44
Views: 2,245
Posted By wphamilton

Seems like you could push the stem down to get a...

Seems like you could push the stem down to get a gap, then puncture the tube.
01-22-21, 12:07 PM
Replies: 123
Views: 3,727
Posted By wphamilton

The wired bike computer is the more authoritative...

The wired bike computer is the more authoritative source for speed and distance. GPS wins for convenience and additional functionality, which is the only good reason to use GPS at all IMO. Keeping...
01-17-21, 02:47 PM
Replies: 123
Views: 8,556
Posted By wphamilton

I don't see that it does, at all. Transport...

I don't see that it does, at all.

Transport of the water from intravascular storage might be osmosis, or might be some active transport mechanism. I haven't looked into it beyond confirming that...
01-16-21, 03:20 PM
Replies: 123
Views: 8,556
Posted By wphamilton

I've had some 3 hour rides without water, didn't...

I've had some 3 hour rides without water, didn't like it because after about 5 pounds (for me) of water loss my performance takes a hit and it feels horrible. Only a few times though because with...
01-11-21, 09:28 AM
Replies: 11
Views: 727
Posted By wphamilton

You're an attorney, right? I'm not being...

You're an attorney, right? I'm not being facetious, asking seriously.

You'd agree that having data to review has no legal consequence at all with an UDAP action. Granted I haven't read the...
01-06-21, 10:24 AM
Replies: 25
Views: 1,031
Posted By wphamilton

A few mm is trivial, representing a small change...

A few mm is trivial, representing a small change in the positioning of your torso and arms.

Our tolerance for these slight variations appears to vary among individuals. I wouldn't think twice...
12-28-20, 10:02 AM
Replies: 3,267
Views: 323,531
Posted By wphamilton

It's funny when I peak under "This user is on...

It's funny when I peak under "This user is on your Ignore List." and it's always the same comment, with variations in phrasing.
12-28-20, 09:56 AM
Replies: 22
Views: 1,068
Posted By wphamilton

One of these, no idea where that came from....

One of these, no idea where that came from. Sorry.
https://cimg0.ibsrv.net/gimg/bikeforums.net-vbulletin/1037x380/clipboard01_073d89899a6dc03f977fa903a62eeb768502259a.jpg
12-27-20, 12:57 PM
Replies: 22
Views: 1,068
Posted By wphamilton

Right foot down most often though I ride with...

Right foot down most often though I ride with half-clips and platforms so I use either foot sometimes.

I mount the bike from the left side and it seems more natural to plant my right foot and...
12-26-20, 08:30 PM
Replies: 3,267
Views: 323,531
Posted By wphamilton

I am explaining - not arguing actually - that we...

I am explaining - not arguing actually - that we don't know *enough* about the cycling habits, not that we don't know something "exactly". The available data might fit either hypothesis.

If for...
12-25-20, 08:09 AM
Replies: 3,267
Views: 323,531
Posted By wphamilton

"Speeds are low" is another example of...

"Speeds are low" is another example of assumptions based on too little, and too general. We don't actually know what the "speeds" are in the US. We also don't know how those speeds are distributed...
12-25-20, 01:38 AM
Replies: 3,267
Views: 323,531
Posted By wphamilton

Bad choice of words on my part, because I'm not...

Bad choice of words on my part, because I'm not talking about statistics. Just the multiplying of variables each having a measure of uncertainty.

The statement you ask about is more correct, but...
12-24-20, 04:30 PM
Replies: 62
Views: 4,770
Posted By wphamilton

Accurate. I don't remember any conscious...

Accurate. I don't remember any conscious decision based on the bike not being cool, because it didn't even enter the equation. I had a poignant moment of nostalgia and regret, mixed with...
12-24-20, 04:07 PM
Replies: 3,267
Views: 323,531
Posted By wphamilton

We'd be multiplying too many uncertainties in...

We'd be multiplying too many uncertainties in that chain, for it to be reasonable to me. The confidence interval shrinks to almost nothing (meaning we wouldn't know that the answer was right or even...
12-23-20, 10:55 PM
Replies: 3,267
Views: 323,531
Posted By wphamilton

What is the average trip distance in The...

What is the average trip distance in The Netherlands and the US? You can't correctly quantify exposure without it, when you're citing the number of trips.
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