Landracing Forum
Bonneville Salt Flats Discussion => 2017 and before: SW & WF => SpeedWeek 2014 => Topic started by: debgeo on March 11, 2014, 03:51:10 PM
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Powered by bicycle 88 MPH
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http://www.recumbents.com/wisil/whpsc2013/results.htm
Date 9/14/2013
Rider Sebastiaan Bowier
Vehicle Name Velox 3
New design in the works: http://www.hptdelft.nl/en/
Speed MPH 83.13
Speed KPH 133.78
:cheers:
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THANKS for correction Woody.
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Very impressive speed. I wonder if there is power data available for that run? I'm guessing 1,000+ watts average.
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... I'm guessing 1,000+ watts average...
Maybe. I don't know if a human can apply about 1.5 HP or not.
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... I'm guessing 1,000+ watts average...
Maybe. I don't know if a human can apply about 1.5 HP or not.
Maybe for 8 furlongs... :-D
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... I'm guessing 1,000+ watts average...
Maybe. I don't know if a human can apply about 1.5 HP or not.
Maybe for 8 furlongs... :-D
I vaguely remember reading something about top Tour De France riders being able to produce 800 watts for short periods of time. As in climbing mountains. Power for average riders was 700/750 watts.
745.7 watts/hp
Average U.S. male Olympic athlete (non-cyclist) tested @ .5 hp approx. 373 watts
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They couldn't go any faster than 88 mph because whenever they did, they went back in time...
Jeff
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I vaguely remember reading something about top Tour De France riders being able to produce 800 watts for short periods of time. As in climbing mountains. Power for average riders was 700/750 watts.
745.7 watts/hp
Average U.S. male Olympic athlete (non-cyclist) tested @ .5 hp approx. 373 watts
Is that with or without performance enhancing drugs. :roll:
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got any shapes like that on your hard drive Woody?
kent
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Kent, if I tell you I have to kill you! :-D However, I do have a concept for a 100+ mph human powered vehicle but can't get anyone interested in building it. Would be a great university project! :cheers:
This shape was optimized analytically for the velocity/pressure distributions at the chosen speed range of 80~85 mph. [Laminar flow thingy!] Add 100, 200 or 300 mph and it all changes. The previous record holder was an "organic" design by a sculptor. http://www.varnahandcycles.com/hpv.htm The air getting into the wheel wells is a killer for these machines. :-(
Now where did I put that weed-whacker engine and the model airplane fuel? :?
There was a CFD study done that "proved" that if the second place guy would have cut his ponytail he would have beat the "enhanced" Lance! About 9 grams of drag is considered the theoretical difference between first and second place - all other enhancements being equal! :-o
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9 grams is approx. 4 times the weight difference in a NASCAR connecting rod that means legal/illegal for a competition imbalance.
DW
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Took a while to find this, it was farther back than I thought
http://www.landracing.com/forum/index.php/topic,4084.0.html
Max HP for a trained rider in recumbant position is just over 2HP. Much better than a conventional bicycle position.
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Kent, if I tell you I have to kill you! :-D However, I do have a concept for a 100+ mph human powered vehicle but can't get anyone interested in building it. Would be a great university project! :cheers:
This shape was optimized analytically for the velocity/pressure distributions at the chosen speed range of 80~85 mph. [Laminar flow thingy!] Add 100, 200 or 300 mph and it all changes. The previous record holder was an "organic" design by a sculptor. http://www.varnahandcycles.com/hpv.htm The air getting into the wheel wells is a killer for these machines. :-(
Now where did I put that weed-whacker engine and the model airplane fuel? :?
There was a CFD study done that "proved" that if the second place guy would have cut his ponytail he would have beat the "enhanced" Lance! About 9 grams of drag is considered the theoretical difference between first and second place - all other enhancements being equal! :-o
I'll build it. :wink:
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Kent, if I tell you I have to kill you! :-D However, I do have a concept for a 100+ mph human powered vehicle but can't get anyone interested in building it. Would be a great university project! :cheers:
This shape was optimized analytically for the velocity/pressure distributions at the chosen speed range of 80~85 mph. [Laminar flow thingy!] Add 100, 200 or 300 mph and it all changes. The previous record holder was an "organic" design by a sculptor. http://www.varnahandcycles.com/hpv.htm The air getting into the wheel wells is a killer for these machines. :-(
Now where did I put that weed-whacker engine and the model airplane fuel? :?
There was a CFD study done that "proved" that if the second place guy would have cut his ponytail he would have beat the "enhanced" Lance! About 9 grams of drag is considered the theoretical difference between first and second place - all other enhancements being equal! :-o
I'll build it. :wink:
Where do I sign up for the team?
My PowerAde ration can go to the cylclists, I'll be swilling something "better". :wink:
The model airplane fuel I'd use is the stuff with Nitro . . . .
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They couldn't go any faster than 88 mph because whenever they did, they went back in time...
Jeff
ha!
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This shape was optimized analytically for the velocity/pressure distributions at the chosen speed range of 80~85 mph. [Laminar flow thingy!] Add 100, 200 or 300 mph and it all changes.
Actually, until we get to much higher Rn the lowest drag shape will be a natural laminar flow design very close to a NACA 66xxx to 67xxx. Above 100 million Rn, there's a small advantage to moving the max thickness point a little more forward. Anyone building for up to 400 mph is well below this.
Above 500 mph, we're getting into transonics and that leads to super-critical airfoils with less laminar flow and flatter velocity profiles. Supersonic, we go towards "bi-convex" airfoils to minimize wave drag. In all of this, the separation drag at the rear and under the vehicle is the biggest area of improvement available for LSR.
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... I'm guessing 1,000+ watts average...
Maybe. I don't know if a human can apply about 1.5 HP or not.
Maybe for 8 furlongs... :-D
Bob, :-D :-D :-D