Can't really find any info on her height but I am going to ballpark her around 5'8 and pretty narrow in the TT position. I am 5'11 and and also pretty damn narrow and I think it would take me 300-310 watts to go 44kmh on a nice slippery track. So I will give her ~10% savings over me and estimate 265-275 watts.

There you go, that's the find of "horse shoes and hand grenades" arithmetic you get when you can find next to zero information about the rider in question.

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Math must be wrong. I doubt the women's hour record can be achieved with only 275 watts. That would mean me, a MOP ag'er, could break the record and probably not get my heart rate above 165.

No. I agree that 275w could get her there.

Are you a guy? That's the difference right there.

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Do you have the frontal area of a toaster oven? That could be the discrepancy you are missing.

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Did you even look at the record? 44 km/h shouldn't take a shit ton of watts with a good position.

I'm certain that the women's WORLD hour record can be broken on fewer watts than 275. Depends on the amount of drag of the rider...

I'm sure her coach, Dave Jordaan, would tell me if I asked...but that doesn't help y'all. :)

I think that is a very good estimate.* My 5'6" wife, for example, would require a sustained power of 260 W to match her speed.

*I know that Shaffer Van Houweling has been to the San Diego wind tunnel, and may even have her data still kicking around some where. I haven't tried to estimate her hour power, though.

I know of a fellow about 5-9 to 5-10 and 145lbs that can go ~45kph on ~265w. of course that is not at sea level , but 850'

Yeah, that sounds about right. I'm 5'8 and 145 pounds or so, and 44km/h would be around 280w (for me).

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She has spent a lot of time and effort tuning her position and choosing equipment.

Thanks for the guesses ya'all. Looks like it's a somewhat soft record, there's quite a few pro triathletes that could beat it.

Then they should try.

I have a male client that did 48.4km on 280W. Sea level.

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So what watts for 51.1km in an hr?

A male triathlete...maybe.

[/quote]
I have a male client that did 48.4km on 280W. Sea level.[/quote]
I hate being 6'2'' :(

For the women?

There are a couple, probably, but then this is an American hour record, and I don't know of any American women triathlete pros that would be a shoe in, even on just power per height alone...and then you have to get as aero as her, without losing any power.

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

Welcome back.

gunsbuns wrote:

So what watts for 51.1km in an hr?

I can't tell you the power required without better knowledge of an individual's aerodynamics, but I can reasonably estimate the W/m^2 required, which doesn't vary a lot over a fairly wide range of power outputs:



More details here:
Hour record: Jens Voigt


But of course it also depends on air density, which is mostly a function of temperature, barometric pressure and altitude. Lower air density means less power is required for same speed.


Temperature is not always controllable, but in some velodromes it is, barometric pressure you are pretty much at the mercy of the weather on the day, and altitude is something you can choose to alter by going to different tracks.






More here:
W/m^2, Altitude and the Hour Record

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Thanks. I'll do my best to avoid a Horshack laugh.

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A Kottered crank? - you are dating yourself.

I'll go to work dating myself... This is all from memory, but as far as I know it's mostly accurate. Colby Pearce went nearly 51 kph for an hour as an amateur on team Taya Chain on the track in Colorado Springs back in '95, this track is high (6000 plus feet) but outdoor, so maybe a wash there? He rode a Lotus Superbike, with a Hed disc and a Deep front wheel, and I believe the old Scott Extreme bars made famous during Lemond's last couple of years. An early adopter of SRM power-use, I remember reading and him telling me his watts were in the 310 range, which I couldn't believe considering the speed, regardless of drag. This was until I rode behind him for a few K trying to catch a group we'd been dropped from at Fitchburg in '96, where he finished 4th in the TT as an amateur. He folded down on his Scott "Rake" bars with what I believe was a 16-17cm stem, and almost disappeared. It was markedly harder to ride on his wheel while pulling than anyone else in the group! It was only then that I believed his surprisingly low wattage numbers. At 135ish pounds and 5'8, one would think with his ability to TT, he should be one heck of a climber, which I don't believe he ever was, it may have even been a weakness.?. It didn't surprise me to see him make the Olympic team a few years later riding the points race, an event that favors guys who are very good power-to-drag-wise at high speeds in a road drop bar position. They're usually not small though, and he was smallish and quite lanky, but amazingly slippery. Back then, wind tunnel numbers were analyzed in pounds of drag, and I think he registered something like 3.9 or 4 pounds of drag in the Texas A&M tunnel. Prior to that, the lowest they had seen from an elite rider was in the ~4.5 range. This was a number that I believe could be mathematically used with watts linearly to accurately predict speed. In a riding position that can be reasonably held for an hour, with a wattage that a rider can stay close to for an hour in said position, assuming the rider stays on the black line on the track, the hour record is simply math. I do think most age group triathletes I see should focus more on watt-production than they do drag-reduction, but that's just my bias coming into play from what I see.