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Search: Posts Made By: RChung
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Forum: Road Cycling
10-16-19, 08:59 AM
Replies: 33
Views: 1,120
Posted By RChung

I'm pretty sure I ride in the real world, on real...

I'm pretty sure I ride in the real world, on real courses on real roads.
Forum: Road Cycling
10-15-19, 09:17 PM
Replies: 33
Views: 1,120
Posted By RChung

The Bill of Rights bans cruel and unusual...

The Bill of Rights bans cruel and unusual punishment.
Forum: Road Cycling
10-14-19, 08:04 PM
Replies: 33
Views: 1,120
Posted By RChung

Yes.

Yes.
Forum: Road Cycling
09-30-19, 10:30 AM
Replies: 96
Views: 5,168
Posted By RChung

If only it were somehow possible to measure...

If only it were somehow possible to measure differences in drag between two bikes while a rider's legs are moving.
Forum: Road Cycling
09-16-19, 11:07 AM
Replies: 50
Views: 2,968
Posted By RChung

If you have an on-bike power meter mounted on a...

If you have an on-bike power meter mounted on a dumb trainer, you might not even need a box. Just alter the torque intercept and slope. (Though there are ways to detect this, too -- it's just a bit...
Forum: Road Cycling
09-15-19, 02:02 PM
Replies: 50
Views: 2,968
Posted By RChung

Zwift's chief developer used to post here.

Zwift's chief developer used to post here.
Forum: Road Cycling
09-15-19, 10:19 AM
Replies: 50
Views: 2,968
Posted By RChung

There are ways to detect naive cheating (and the...

There are ways to detect naive cheating (and the article makes it sound like this falls into this category) but a clever dedicated motivated cheater can almost always find a way to make detection...
Replies: 8
Views: 825
Posted By RChung

Lambie spent the last month sleeping at 2500m...

Lambie spent the last month sleeping at 2500m (and training at 1600m).
Replies: 18
Views: 1,157
Posted By RChung

If that happens, give a shout out. I have a few...

If that happens, give a shout out. I have a few ideas.
Forum: Road Cycling
08-07-19, 12:03 AM
Replies: 95
Views: 6,484
Posted By RChung

Two things: 1. It shouldn't surprise you...

Two things:

1. It shouldn't surprise you that I've actually done the calculations. No matter what gear you're in, if you drop your cadence (which, of course, drops your speed) your pedal force...
Forum: Road Cycling
08-06-19, 11:53 PM
Replies: 88
Views: 8,088
Posted By RChung

Hmmm. I'm not sure: almost everything confirmed...

Hmmm. I'm not sure: almost everything confirmed things we already expected to find -- what was kinda cool was that the instrumentation was sensitive enough to actually show it. I've been fortunate...
Forum: Road Cycling
08-06-19, 03:15 PM
Replies: 95
Views: 6,484
Posted By RChung

That's a 7% difference in rpm. If you're really...

That's a 7% difference in rpm. If you're really on the knife edge, decrease your power by 7%
Forum: Road Cycling
08-06-19, 03:08 PM
Replies: 88
Views: 8,088
Posted By RChung

Thanks for completely changing my mind....

Thanks for completely changing my mind. Invaluable quantitative evidence and real-world experience all in one brief issuance.
[/QUOTE]
RShantz is right. I've worked with Olympic and World Cup...
Forum: Road Cycling
07-30-19, 02:43 AM
Replies: 209
Views: 17,615
Posted By RChung

Great first post. You'll fit in well here. ...

Great first post. You'll fit in well here.



More likely you're miles ahead in a matter of minutes cuz your wife doesn't want to be anywhere near you.
Forum: Road Cycling
07-22-19, 02:30 AM
Replies: 5
Views: 747
Posted By RChung

https://cimg5.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg5.ibsrv.net/gimg/bikeforums.net-vbulletin/1748x1255/maier2017_f96bd5ae287d0961612fcd64bd2381a201250eb0.png...
Replies: 68
Views: 7,289
Posted By RChung

This is right. If the company won't back specific...

This is right. If the company won't back specific repeated assurances or promises made by their employees, any information you receive from any employee of the company cannot be trusted. *None of...
Forum: Road Cycling
07-13-19, 01:46 PM
Replies: 32
Views: 1,335
Posted By RChung

Yeah. I don't believe all the claims. However,...

Yeah. I don't believe all the claims. However, people whose testing I believe claim that Nopinz and Rule 28 both make socks that are faster than bare skin. There may be others but I'm not interested...
Forum: Road Cycling
07-13-19, 12:49 PM
Replies: 32
Views: 1,335
Posted By RChung

Yes, the tights were slower. At the time I was...

Yes, the tights were slower. At the time I was more interested in developing and testing the estimation procedure and less interested in aero testing specific articles of clothing, and it was cold --...
Forum: Road Cycling
07-13-19, 01:47 AM
Replies: 32
Views: 1,335
Posted By RChung

That's an interesting question. Years ago when I...

That's an interesting question. Years ago when I first started testing aerodynamic drag I happened to be testing in the spring when the weather could be variable. As a side effect, I happened to do...
Forum: Road Cycling
07-08-19, 11:07 PM
Replies: 32
Views: 1,756
Posted By RChung

Good point.

Good point.
Forum: Road Cycling
07-08-19, 09:13 PM
Replies: 32
Views: 1,756
Posted By RChung

So your FTP was ~320, and your PR was achieved by...

So your FTP was ~320, and your PR was achieved by 7 minutes at 304 which was as hard as possible, trying not to die?
Forum: Road Cycling
07-08-19, 11:08 AM
Replies: 32
Views: 1,756
Posted By RChung

Constant power output is time-minimizing only...

Constant power output is time-minimizing only when conditions are constant. If conditions are variable (like, changes in gradient or wind), the time-minimizing strategy is also variable. The amount...
Forum: Road Cycling
07-08-19, 10:55 AM
Replies: 11
Views: 837
Posted By RChung

Yup. Exact setup and exact equipment can make a...

Yup. Exact setup and exact equipment can make a pretty big difference. For UCI-compliant TT bikes and positions, your upper arms and lower legs are pretty much cylinders, and cylinders are...
Forum: Road Cycling
07-08-19, 09:51 AM
Replies: 47
Views: 2,747
Posted By RChung

Battle Mountain isn't a flat course. You can tell...

Battle Mountain isn't a flat course. You can tell because they don't take the average of two-way runs -- it's a one-way run only.
Forum: Road Cycling
07-08-19, 09:40 AM
Replies: 11
Views: 837
Posted By RChung

I don't think I've ever measured the CdA of a LWB...

I don't think I've ever measured the CdA of a LWB USS recumbent -- they're pretty rare nowadays. As you may know, there's a lot of variability in how SWB recumbents are set up; accordingly, there's a...
Forum: Road Cycling
07-08-19, 08:47 AM
Replies: 11
Views: 837
Posted By RChung

The problem isn't in the calculations per se --...

The problem isn't in the calculations per se -- those are well understood if not well known. The problem is that he used very rough physiological models to get from height and weight to CdA. Since I...
Forum: Road Cycling
07-07-19, 11:05 PM
Replies: 11
Views: 837
Posted By RChung

I'm not terribly fond of that calculator. The...

I'm not terribly fond of that calculator. The assumptions it makes about CdA tend to run high for me (and it appears to underestimate CdA for recumbents): for example, for riding on bar tops, it...
Forum: Road Cycling
07-05-19, 12:39 PM
Replies: 75
Views: 5,702
Posted By RChung

Moi aussi. I find the narrower ones trap you from...

Moi aussi. I find the narrower ones trap you from easily escaping the inevitable obstruction. When the lanes are to the right of parked cars, you have to watch for errant pedestrians on one side and...
Forum: Road Cycling
06-27-19, 09:42 AM
Replies: 21
Views: 1,780
Posted By RChung

Very nice. However, you still don't know whether...

Very nice. However, you still don't know whether the guys who answer your post are also using a Lezyne digital pressure gauge. Bottom line, you'll just have to experiment.

A couple of years ago I...
Forum: Road Cycling
06-27-19, 08:51 AM
Replies: 21
Views: 1,780
Posted By RChung

There's a huge range in accuracy (and precision)...

There's a huge range in accuracy (and precision) among pumps. What that means is that it's hard to evaluate someone else's post that they run X psi.

Unless you have a way to evaluate your pump and...
Forum: Road Cycling
06-25-19, 07:55 AM
Replies: 120
Views: 9,879
Posted By RChung

Your statement about Wiggins, as you *should*...

Your statement about Wiggins, as you *should* know, was incorrect for two reasons: 1) Campenaerts holds the record, not Wiggins. 2) Wiggins (and Campenaerts) rode with power meters -- they just...
Forum: Road Cycling
06-24-19, 09:11 PM
Replies: 120
Views: 9,879
Posted By RChung

Wiggins absolutely positively used a PM in...

Wiggins absolutely positively used a PM in training and prep for the hour. Victor Campenaerts (who is the fastest for the hour) did, too. Peter Sagan uses a PM. All three of those guys are faster...
Forum: Road Cycling
06-24-19, 08:52 AM
Replies: 42
Views: 2,208
Posted By RChung

The focus on cadence has caused more harm than...

The focus on cadence has caused more harm than good.
Forum: Road Cycling
06-23-19, 09:01 AM
Replies: 120
Views: 9,879
Posted By RChung

Different people are motivated by different...

Different people are motivated by different things. Congratulations on finding something that works for you.
Forum: Road Cycling
06-21-19, 02:00 PM
Replies: 32
Views: 1,966
Posted By RChung

Two numbers can be generated because there are...

Two numbers can be generated because there are (almost always) two torque peaks per pedal stroke even if you measure at the spider, so you can (if you're intent on trying to generate two numbers)...
Forum: Road Cycling
06-21-19, 09:18 AM
Replies: 32
Views: 1,966
Posted By RChung

For average fat guys with the fantasy of getting...

For average fat guys with the fantasy of getting better but unsure if the cost is worth it, I usually advise buying a used PM. If you're not in a hurry, you could probably find a good quality used PM...
Forum: Road Cycling
06-21-19, 09:09 AM
Replies: 32
Views: 1,966
Posted By RChung

I didn't know that SRM made a single-leg model....

I didn't know that SRM made a single-leg model. Which one is that?
Forum: Recumbent
06-14-19, 04:10 PM
Replies: 41
Views: 9,289
Posted By RChung

Were you thinking of PurplePeople? He designed...

Were you thinking of PurplePeople? He designed and built a tilting trike.
Forum: Recumbent
06-14-19, 03:54 PM
Replies: 41
Views: 9,289
Posted By RChung

[/quote] And I stand by my old statement:

[/quote]
And I stand by my old statement:
Forum: Recumbent
06-14-19, 12:40 PM
Replies: 41
Views: 9,289
Posted By RChung

Um, thanks, but even I don't think I'm OK. ...

Um, thanks, but even I don't think I'm OK.

I'm just saying I didn't have ulterior motives.
Forum: Recumbent
06-13-19, 06:43 PM
Replies: 41
Views: 9,289
Posted By RChung

I was searching for something and came across...

I was searching for something and came across this thread from nearly a decade ago. Reading through it again was nostalgic. Man, you guys were suspicious back then.
Forum: Road Cycling
06-13-19, 11:36 AM
Replies: 79
Views: 8,025
Posted By RChung

You might be surprised. I've measured the CdA of...

You might be surprised. I've measured the CdA of several recumbent riders, and many riders on TT bikes. Most of the (unfaired) recumbent riders measure somewhere in the .17 to .35 m^2 range. Most of...
Forum: Road Cycling
06-13-19, 10:35 AM
Replies: 79
Views: 8,025
Posted By RChung

Yep. Actually, in terms of total "A", handlebars...

Yep. Actually, in terms of total "A", handlebars and rear wheels (and front rim shape and depth), and head tube size, have almost no effect. Their effect is almost entirely through the Cd part of...
Forum: Road Cycling
06-12-19, 10:28 PM
Replies: 79
Views: 8,025
Posted By RChung

Hmmm. Actually, usually, yes, but there are...

Hmmm. Actually, usually, yes, but there are situations where all of those things combined matter more than position.
Forum: Road Cycling
06-12-19, 05:14 PM
Replies: 79
Views: 8,025
Posted By RChung

Depends on which helmet and wheels you started...

Depends on which helmet and wheels you started with. That's particularly so for helmets, which tend to be much more individualized. That said, for most riders, in most common sizes, clothing matters...
Forum: Road Cycling
06-12-19, 10:23 AM
Replies: 79
Views: 8,025
Posted By RChung

You can do both, you know. That's allowed.

You can do both, you know. That's allowed.
Forum: Road Cycling
06-12-19, 09:25 AM
Replies: 79
Views: 8,025
Posted By RChung

Then ride it on your TT.

Then ride it on your TT.
Forum: Road Cycling
06-01-19, 09:52 AM
Replies: 38
Views: 4,063
Posted By RChung

Yeah, I've done Mt. Diablo many times, including...

Yeah, I've done Mt. Diablo many times, including using that bike with the 39/26 before I took it to France. That final pitch could be pretty grim with that gearing, but I've never walked it. It would...
Forum: Road Cycling
06-01-19, 08:08 AM
Replies: 38
Views: 4,063
Posted By RChung

I think this is best. That said, the really...

I think this is best.

That said, the really steep pitches on Brasstown Bald are short. My weight and FTP are close to yours -- actually, my weight is a couple of kilos higher and my power is a few...
05-20-19, 09:30 PM
Replies: 67
Views: 5,507
Posted By RChung

Pereiro was elevated to the 2006 win after Landis...

Pereiro was elevated to the 2006 win after Landis was disqualified.
Schleck was elevated to the 2010 win after Contador was disqualified.
Showing results 1 to 50 of 1000
 


 
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