Search: Posts Made By: asgelle
Showing results 1 to 50 of 1000
Search took 1.22 seconds.
Forum: Road Cycling
06-12-19, 08:56 PM
Replies: 72
Views: 2,941
Posted By asgelle

Have you found a position you can ride without...

Have you found a position you can ride without handlebars? I havenít. Where do you attach the brake levers?
06-06-19, 10:14 AM
Replies: 62
Views: 2,582
Posted By asgelle

The term you're looking for then is fast or...

The term you're looking for then is fast or faster.
06-06-19, 07:10 AM
Replies: 62
Views: 2,582
Posted By asgelle

The proper definition of efficiency in the...

The proper definition of efficiency in the context of physics is work performed per unit of energy consumed. In cycling, work is done through the opposing forces of gravity, rolling resistance, and...
06-05-19, 10:03 AM
Replies: 62
Views: 2,582
Posted By asgelle

Don' just make things up. Using the defaults...

Don' just make things up.

Using the defaults at analyticcycling.com, a 165 lb bike+rider would coast down a
5% grade at 33 mph so a rider would have to brake to go 29 or 31 mph. That said, The...
05-29-19, 01:15 PM
Replies: 63
Views: 3,109
Posted By asgelle

Forget the legs, forget the rider, get rid of the...

Forget the legs, forget the rider, get rid of the chain. Put a 10 lb weight on one pedal, what happens? Now put 10 lbs on each pedal, what happens? With 10 lbs on each pedal, how hard do you have to...
05-29-19, 12:40 PM
Replies: 63
Views: 3,109
Posted By asgelle

The descending leg doesnít have to push the other...

The descending leg doesnít have to push the other leg up, gravity does that. And you have it wrong; pros donít pull the ascending leg up. That data was published more than 25 years ago.
05-29-19, 12:16 PM
Replies: 63
Views: 3,109
Posted By asgelle

Doesnít the weight of the descending leg raise...

Doesnít the weight of the descending leg raise the other without any need to lift it?
05-22-19, 06:00 PM
Replies: 6
Views: 1,596
Posted By asgelle

Power, not force. Force is power divided by speed.

Power, not force. Force is power divided by speed.
Forum: Road Cycling
05-22-19, 06:52 AM
Replies: 26
Views: 1,747
Posted By asgelle

And everyone who understands what went on knows...

And everyone who understands what went on knows the problem had nothing to do with the particular tire or tubeless vs. clincher, vs. tubular. His tires were simply too narrow for the conditions given...
Forum: Road Cycling
04-28-19, 02:17 PM
Replies: 67
Views: 3,692
Posted By asgelle

That would be no wind/tailwind, hardly the same...

That would be no wind/tailwind, hardly the same as saying headwind and tailwind cancel out.
Forum: Road Cycling
04-28-19, 01:56 PM
Replies: 67
Views: 3,692
Posted By asgelle

Except it doesn't. You spend more time in the...

Except it doesn't. You spend more time in the headwind than the tailwind so for constant power, your overall time will be slower in the headwind/tailwind loop than the one with no wind at all.
Forum: Road Cycling
04-28-19, 09:13 AM
Replies: 67
Views: 3,692
Posted By asgelle

Unless we're careful with language, statement...

Unless we're careful with language, statement like this (which is qualitatively correct),

lead to ones like this,

Which are incorrect.

Theoretically mass does matter even on flat ground....
Forum: Road Cycling
04-28-19, 07:38 AM
Replies: 67
Views: 3,692
Posted By asgelle

Given the non-linear nature of aero drag, this...

Given the non-linear nature of aero drag, this doesn't make sense. If your times are the same on calm and windy days, there's something going on to offset the increased drag from the wind.
Forum: Road Cycling
04-25-19, 08:26 PM
Replies: 67
Views: 3,692
Posted By asgelle

Donít assume everyone has the same priorities you...

Donít assume everyone has the same priorities you do. Riding tires with 0.005 higher Crr is like always riding a 0.5% steeper road than the one youíre on. For me thatís important. I donít expect...
04-25-19, 08:48 AM
Replies: 82
Views: 8,013
Posted By asgelle

Is an offensive tackle not playing to win because...

Is an offensive tackle not playing to win because he doesn't score touchdowns? (or for fans of football, why is there a goalie who isn't expected to score goals and help the team win?)
04-06-19, 08:46 PM
Replies: 81
Views: 2,805
Posted By asgelle

Gedanken.

Gedanken.
04-06-19, 06:53 PM
Replies: 81
Views: 2,805
Posted By asgelle

think about all things being equal.

think about all things being equal.
04-02-19, 12:41 PM
Replies: 81
Views: 2,805
Posted By asgelle

What about rolling resistance? Do you think it's...

What about rolling resistance? Do you think it's a hoax?
Forum: Road Cycling
04-02-19, 12:10 PM
Replies: 22
Views: 814
Posted By asgelle

Post #9...

Post #9 (https://www.bikeforums.net/usertag.php?do=list&action=hash&hash=9) explains why it's important pretty well.
04-01-19, 07:40 AM
Replies: 81
Views: 2,805
Posted By asgelle

Why do you think changing the location of the...

Why do you think changing the location of the weight wouldn't change air resistance? It's possible it might not, but not at all certain.
03-29-19, 07:58 PM
Replies: 81
Views: 2,805
Posted By asgelle

Yes, but how much more? 10%, 1%, or as is more...

Yes, but how much more? 10%, 1%, or as is more likely 0.1%? Does it matter that 1lb on a wheel equals 1.001lb on the bike?

Also, I don’t think anyone thinks losing ~5lbs from the bike is better...
03-29-19, 06:45 PM
Replies: 81
Views: 2,805
Posted By asgelle

In a vacuum. I donít ride in vacuum.

In a vacuum. I donít ride in vacuum.
03-29-19, 02:56 PM
Replies: 81
Views: 2,805
Posted By asgelle

https://analyticcycling.com Knock yourself out.

https://analyticcycling.com Knock yourself out.
Forum: Road Cycling
02-21-19, 09:43 AM
Replies: 25
Views: 1,588
Posted By asgelle

I look at the measured differences in weight and...

I look at the measured differences in weight and drag from a reliable source then use a model like the one at http://analyticcycling.com to evaluate the effect of the change for various scenarios...
Forum: Road Cycling
02-18-19, 09:01 AM
Replies: 45
Views: 1,398
Posted By asgelle

Power is cubic, force is quadratic. Both are...

Power is cubic, force is quadratic. Both are polynomials.
Forum: Road Cycling
02-18-19, 08:51 AM
Replies: 45
Views: 1,398
Posted By asgelle

Once again, it is not. Drag force is quadratic in...

Once again, it is not. Drag force is quadratic in velocity, a polynomial function. Isn't it just as easy to get is right as get it wrong?
Forum: Road Cycling
02-18-19, 08:21 AM
Replies: 45
Views: 1,398
Posted By asgelle

Not exactly. Rolling resistance comes from the...

Not exactly. Rolling resistance comes from the difference in energy it takes to deform the tire at the front from the energy recovered when the tire returns to its original shape at the rear (plus a...
02-04-19, 04:10 PM
Replies: 99
Views: 3,693
Posted By asgelle

You really have no idea what the drag on shoe...

You really have no idea what the drag on shoe laces or speed suits are do you? Don't be afraid, admit it.

And surely you must realize recumbents aren't allowed in bicycle races.
02-04-19, 07:39 AM
Replies: 99
Views: 3,693
Posted By asgelle

I'm pretty sure all the strain gauges used in...

I'm pretty sure all the strain gauges used in testing have built in placebo compensation.
02-03-19, 09:10 PM
Replies: 22
Views: 1,304
Posted By asgelle

You said you wanted a power/speed curve. Doesnít ...

You said you wanted a power/speed curve. Doesnít the Snap transmit (or have the capability to) power and speed to the Elemnt? Make your own curve.
02-03-19, 10:41 AM
Replies: 22
Views: 1,304
Posted By asgelle

It sounds like you're running the Snap in erg...

It sounds like you're running the Snap in erg mode. If you run in Level mode, it should behave like a fluid trainer.https://support.wahoofitness.com/hc/en-us/articles/204281764
01-28-19, 04:37 PM
Replies: 41
Views: 1,700
Posted By asgelle

You're assuming a level of analysis which wasn't...

You're assuming a level of analysis which wasn't present in the generation of the table. If you look back at the history of the chart, Coggan got data for for maximum and minimum performances for...
01-28-19, 08:31 AM
Replies: 99
Views: 3,693
Posted By asgelle

I'm not sure how you personally measure better,...

I'm not sure how you personally measure better, but in terms of reducing drag, performance is very dependent on the individual, and there's no way of knowing which will perform better without...
01-26-19, 08:51 AM
Replies: 69
Views: 2,840
Posted By asgelle

As Robert Chung says the proof of the pudding is...

As Robert Chung says the proof of the pudding is in the tasting. Just so, the proof of the hypothesis is in the testing. Not only has the kinetic model using a linear power for rolling resistance...
01-26-19, 08:11 AM
Replies: 69
Views: 2,840
Posted By asgelle

The power to overcome rolling resistance is...

The power to overcome rolling resistance is proportional to speed, but Carverbiker was talking about forces (drag force proportional to velocity squared). The rolling resistance force is independent...
01-24-19, 11:37 PM
Replies: 69
Views: 2,840
Posted By asgelle

Yes, that would be one purely subjective...

Yes, that would be one purely subjective definition.
Forum: Road Cycling
01-19-19, 09:21 PM
Replies: 70
Views: 2,256
Posted By asgelle

Iím afraid turbulence is going the way of...

Iím afraid turbulence is going the way of efficiency wherein a word with a precise definition is used in a variety of imprecise and incorrect ways until it looses all meaning. Iíd say that for the...
Forum: Road Cycling
01-19-19, 08:05 PM
Replies: 70
Views: 2,256
Posted By asgelle

Iím not trying to ďgetĒ anyone. Iím trying to add...

Iím not trying to ďgetĒ anyone. Iím trying to add clarity by drawing a distinction between laminar/turbulent flow, steady/unsteady flow, and laminar/turbulent boundary layers (which presupposes...
Forum: Road Cycling
01-19-19, 07:03 PM
Replies: 70
Views: 2,256
Posted By asgelle

In a velodrome the air is still, but the bike...

In a velodrome the air is still, but the bike isn't and when looking at drag on the bike, we should be working from the perspective of the bike, not the velodrome.

The transition from laminar to...
01-19-19, 03:13 PM
Replies: 69
Views: 2,840
Posted By asgelle

Then take a look at the equation at the end of...

Then take a look at the equation at the end of post 40 and see that there is no threshold speed for drag.
Forum: Road Cycling
01-19-19, 03:10 PM
Replies: 70
Views: 2,256
Posted By asgelle

Actually, I think he has laminar/turbulent...

Actually, I think he has laminar/turbulent confused with steady/unsteady. At normal cycling speeds, all flow past a bike is fully turbulent (Re O(10^5)). Riding alone on a still day, the flow will be...
Forum: Road Cycling
01-18-19, 09:44 PM
Replies: 70
Views: 2,256
Posted By asgelle

Thanks, but the non sequitor thread is in another...

Thanks, but the non sequitor thread is in another forum.
Forum: Road Cycling
01-18-19, 06:28 PM
Replies: 70
Views: 2,256
Posted By asgelle

Which is why I want the fastest knife.

Which is why I want the fastest knife.
Forum: Road Cycling
01-18-19, 06:16 PM
Replies: 70
Views: 2,256
Posted By asgelle

Everyone started together, the winner crossed the...

Everyone started together, the winner crossed the line covering the distance sooner than everyone else, i.e., less time. Same distance in least time equals fastest.
Forum: Road Cycling
01-18-19, 05:59 PM
Replies: 70
Views: 2,256
Posted By asgelle

And this is where your analogy breaks down. In a...

And this is where your analogy breaks down. In a cycling TT, the winner is the one who rides the fastest (cuts carrots fastest). No one is judged on how tasty their ride is.
01-18-19, 09:05 AM
Replies: 69
Views: 2,840
Posted By asgelle

And that threshold can be anywhere from anything...

And that threshold can be anywhere from anything above a standstill to 186+ mph depending on the individual's definition of significant. To me, that means there is no threshold


Of course there...
01-17-19, 06:27 PM
Replies: 69
Views: 2,840
Posted By asgelle

Your understanding is wrong. There is no magic...

Your understanding is wrong. There is no magic speed at which aero effects begin. Aero drag is present any time a body is moving through a fluid.
01-15-19, 10:30 AM
Replies: 69
Views: 2,840
Posted By asgelle

At 10 mph on a 4% grade, drag is 8% of the total...

At 10 mph on a 4% grade, drag is 8% of the total force on the rider (17% at 15 mph). You might consider that minimal, I don't.

Rolling resistance and force of gravity are both independent of speed...
01-15-19, 10:20 AM
Replies: 69
Views: 2,840
Posted By asgelle

The Martin model,...

The Martin model, http://www.recumbents.com/wisil/MartinDocs/Validation%20of%20a%20mathematical%20model%20for%20road%20cycling.pdf on which the calculators are based lets you do this either...
01-14-19, 04:27 PM
Replies: 69
Views: 2,840
Posted By asgelle

Speak for yourself. Many people have a very good...

Speak for yourself. Many people have a very good grasp of the significance of weight (and rolling resistance and drag) in various scenarios.

This calculator lets you see the contributions of the...
Showing results 1 to 50 of 1000
 


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

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