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Search: Posts Made By: tanhalt
Forum: Road Cycling 04-11-11, 02:28 PM
Replies: 43
Views: 1,180
Posted By tanhalt
By the looks of the pic, that tire is REALLY...

By the looks of the pic, that tire is REALLY squared off (i.e. worn)...it may have only been ~1500 miles, but that's on the rear of a tandem, right? With the higher weight loading on the rear it's...
Forum: Road Cycling 04-11-11, 11:40 AM
Replies: 43
Views: 1,180
Posted By tanhalt
Tube installation error.

Tube installation error.
Forum: Road Cycling 04-11-11, 11:39 AM
Replies: 43
Views: 1,180
Posted By tanhalt
Again, the order of failure is incorrect in that...

Again, the order of failure is incorrect in that statement. You most likely had the tube "pinched" under the bead of the tire and upon inflation it eventually pushed the bead up out of the rim,...
Forum: Road Cycling 04-11-11, 11:33 AM
Replies: 43
Views: 1,180
Posted By tanhalt
As is typical in these discussions, you got the...

As is typical in these discussions, you got the order of failure incorrect. The tire casing failed first, causing the tube to "escape" and ultimately fail as well. That rear tire looks pretty well...
Forum: "The 33"-Road Bike Racing 02-28-11, 07:14 PM
Replies: 12,012
Views: 592,166
Posted By tanhalt
Don't forget the "Whoah, whoah...Oh ****" moment...

Don't forget the "Whoah, whoah...Oh ****" moment ;)

http://i54.tinypic.com/2jb76e.jpg
Forum: "The 33"-Road Bike Racing 02-28-11, 05:56 PM
Replies: 12,012
Views: 592,166
Posted By tanhalt
...and yet, you left that part out ;) What's...

...and yet, you left that part out ;)

What's with you guys from Las Vegas raising your hands after a Cat 4 win and then promptly crashing? Don't you guys know there's a rule against removing your...
Forum: "The 33"-Road Bike Racing 02-28-11, 05:40 PM
Replies: 12,012
Views: 592,166
Posted By tanhalt
Ahem...are you SURE you were awarded 1st place...

Ahem...are you SURE you were awarded 1st place for the RR? I think a teammate of mine might take issue with that... ;-)
Forum: "The 33"-Road Bike Racing 11-29-10, 04:21 PM
Replies: 47
Views: 3,193
Posted By tanhalt
If you're going to have 2 bottles on your bike...

If you're going to have 2 bottles on your bike and a bunch of crap stuffed in your grippers for merely a 40 mile bike race in cool conditions, why bother with the skinsuit?

Now then, if you plan...
Forum: Road Cycling 11-03-10, 11:05 AM
Replies: 53
Views: 2,548
Posted By tanhalt
Either M-Dub or Ben. I'll go with M-Dub.

Either M-Dub or Ben. I'll go with M-Dub.
Forum: Road Cycling 11-03-10, 09:40 AM
Replies: 48
Views: 1,736
Posted By tanhalt
Road tubeless...a solution in search of a problem.

Road tubeless...a solution in search of a problem.
Forum: Road Cycling 11-03-10, 09:39 AM
Replies: 53
Views: 2,548
Posted By tanhalt
I'm amazed that people think that 4 minutes total...

I'm amazed that people think that 4 minutes total is a blazing fast time to change a tube (including checking for whatever punctured). If it takes me more than 4-5 minutes, I know I've been REALLY...
Forum: "The 33"-Road Bike Racing 11-03-10, 09:01 AM
Replies: 85
Views: 3,897
Posted By tanhalt
Well, another way of looking at seeing if it...

Well, another way of looking at seeing if it passes the "smell test" is to calculate the change in frontal area caused by the 3 hole vs. 4 hole configurations (the 3 hole has a thin adapter plate)...
Forum: "The 33"-Road Bike Racing 11-02-10, 11:18 PM
Replies: 85
Views: 3,897
Posted By tanhalt
As compared to a 23mm Vittoria though? Are you...

As compared to a 23mm Vittoria though? Are you saying that if you were to put a 23mm Vittoria on there it would result in lower aero drag?

In any case, what's the logic in testing a wheel with a...
Forum: "The 33"-Road Bike Racing 11-02-10, 11:06 PM
Replies: 85
Views: 3,897
Posted By tanhalt
I thought it was on the Speedplay site...

I thought it was on the Speedplay site itself...but maybe it was somewhere else. I do remember discussing it with a bike industry aerodynamicist (i.e. someone with an actual degree in the field and...
Forum: "The 33"-Road Bike Racing 11-02-10, 09:59 PM
Replies: 85
Views: 3,897
Posted By tanhalt
Actually...a close look at the data plot will...

Actually...a close look at the data plot will reveal the real reason that report was a "fail". I don't think they actually saw the difference they thought they saw ;-)
Forum: "The 33"-Road Bike Racing 11-02-10, 09:57 PM
Replies: 85
Views: 3,897
Posted By tanhalt
Actually, the narrower than recommended tire on...

Actually, the narrower than recommended tire on that rim helped it's drag values, not hindered. It would have made more sense to test the wheels the way they would actually be used (if one didn't...
Forum: "The 33"-Road Bike Racing 11-02-10, 06:53 PM
Replies: 85
Views: 3,897
Posted By tanhalt
Knowing that their wheels WILL be tested by 3rd...

Knowing that their wheels WILL be tested by 3rd parties, what incentive do they have to "gild the lily"?
Forum: "The 33"-Road Bike Racing 11-02-10, 06:38 PM
Replies: 85
Views: 3,897
Posted By tanhalt
I understand what you're saying all too well,...

I understand what you're saying all too well, since I deal with FEA and CFD on a nearly daily basis. I'm just saying that just because you, Brian, and I don't always find it exactly EASY to do such...
Forum: "The 33"-Road Bike Racing 11-02-10, 06:34 PM
Replies: 85
Views: 3,897
Posted By tanhalt
He's THIS guy: ...

He's THIS guy:
http://www.zipp.com/support/askjosh/askjosh.php

AKA "Zipp's Head of Engineering" :thumb:
Forum: "The 33"-Road Bike Racing 11-02-10, 06:31 PM
Replies: 85
Views: 3,897
Posted By tanhalt
What? You don't trust me? :( Sheesh...I...

What? You don't trust me? :(

Sheesh...I point you guys to a veritable "mother lode" of interesting info and you make me spoon feed it to you? :rolleyes:

From another post later in that same...
Forum: "The 33"-Road Bike Racing 11-02-10, 06:26 PM
Replies: 85
Views: 3,897
Posted By tanhalt
That might work...I could send you my narrow...

That might work...I could send you my narrow Jet90 with the Bonty Aerowing TT tire on it to run head to head against the C2 Jet 9. That would be the most "apples to apples" test. What tire would...
Forum: "The 33"-Road Bike Racing 11-02-10, 06:07 PM
Replies: 85
Views: 3,897
Posted By tanhalt
Take it up with Mr. Poertner. ...

Take it up with Mr. Poertner.

http://forum.slowtwitch.com/gforum.cgi?post=3054556;search_string=;#3054556



Yes...they even do the simulations of the shedding behavior in CFD.
Forum: "The 33"-Road Bike Racing 11-02-10, 05:52 PM
Replies: 85
Views: 3,897
Posted By tanhalt
It doesn't take much yaw for the back half of the...

It doesn't take much yaw for the back half of the wheel to be out of the wind shadow of the front of the wheel. Take a look at this vid by Zipp's Josh Poertner taken at Interbike. He shows a CFD...
Forum: "The 33"-Road Bike Racing 11-02-10, 04:52 PM
Replies: 85
Views: 3,897
Posted By tanhalt
That might be possible...when are you going? It...

That might be possible...when are you going? It would be nice if the wheels were tested alone, but I'd settle for a comparison on the bike to a C2 Jet 9 with a 23c tire on it.




Don't get...
Forum: "The 33"-Road Bike Racing 11-02-10, 04:30 PM
Replies: 85
Views: 3,897
Posted By tanhalt
I think you guys are looking for something like...

I think you guys are looking for something like Fig. 1 in this article...

http://img146.imageshack.us/img146/5936/trispokedesign.jpg
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