helium in tires
04-17-02 | 06:15 AM
#3
...just more expensive!
Seriously, as a joke, I once did the calculations for adding hydrogen to a pair of bike tyres (it was to be for an Airborne Zeppelin, BTW
), and found that the weight savings would be about 2 grams total. Helium would likely be half that. And more expensive, too. Using the calculation:
m=PV/RT
You could calculate the weight of the compressed air in your tyres. Since air is generally 30g/mole, and helium is4g/mole, it weighs 1/7.5 that of air. Still, the weight of compressed air is negligible. Formula 1 racers use nitrogen in their tyres, but that is only because it is less reactive, and therefore will hold a constant pressure better. If there were any significant weight benefit, I'm sure a F1 team would've started putting helium inside tyres years ago.
Seriously, as a joke, I once did the calculations for adding hydrogen to a pair of bike tyres (it was to be for an Airborne Zeppelin, BTW
), and found that the weight savings would be about 2 grams total. Helium would likely be half that. And more expensive, too. Using the calculation:m=PV/RT
You could calculate the weight of the compressed air in your tyres. Since air is generally 30g/mole, and helium is4g/mole, it weighs 1/7.5 that of air. Still, the weight of compressed air is negligible. Formula 1 racers use nitrogen in their tyres, but that is only because it is less reactive, and therefore will hold a constant pressure better. If there were any significant weight benefit, I'm sure a F1 team would've started putting helium inside tyres years ago.
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Je vais à vélo, donc je suis!
Je vais à vélo, donc je suis!
04-17-02 | 06:20 AM
#4
The Flying Scot
Joined: Aug 2001
Posts: 1,904
Likes: 0
From: North Queensferry Scotland and London (and France)
Bikes: Custom (Colin Laing) 531c fast tourer/audax, 1964 Flying Scot Continental, 1995 Cinelli Supercorsa, Holdsworth Mistral single speed, Dahon Speed 6 (folder), Micmo Sirocco and a few more
Did Franceso Moser not ride with helium filled tyres in one of his hour record successes?
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plus je vois les hommes, plus j'admire les chiens
1985 Sandy Gilchrist-Colin Laing built 531c Audax/fast tourer.
1964 Flying Scot Continental (531)
1995 Cinelli Supercorsa (Columbus SLX)
1980s Holdsworth Mistral fixed (531)
2005 Dahon Speed 6 (folder)
(YES I LIKE STEEL)
2008 Viking Saratoga tandem
2008 Micmo Sirocco Hybrid (aluminium!)
2012 BTwin Rockrider 8.1
plus je vois les hommes, plus j'admire les chiens
1985 Sandy Gilchrist-Colin Laing built 531c Audax/fast tourer.
1964 Flying Scot Continental (531)
1995 Cinelli Supercorsa (Columbus SLX)
1980s Holdsworth Mistral fixed (531)
2005 Dahon Speed 6 (folder)
(YES I LIKE STEEL)
2008 Viking Saratoga tandem
2008 Micmo Sirocco Hybrid (aluminium!)
2012 BTwin Rockrider 8.1
04-17-02 | 07:38 AM
#5
Senior Member
Joined: Dec 2001
Posts: 17,687
Likes: 12
From: n.w. superdrome
Bikes: 1 trek, serotta, rih, de Reus, Pogliaghi and finally a Zieleman! and got a DeRosa
it was to be for an Airborne Zeppelin, BTW
You should know that for a Zeppelin it should be filled with Hydrogen, and the bikes name (see other threads)
has to be Hindenburg.
The way I figure the hydrogen would save you additional grams
Marty
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Sono più lento di quel che sembra.
Odio la gente, tutti.
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04-17-02 | 09:06 AM
#6
feros ferio
Joined: Jul 2000
Posts: 22,398
Likes: 1,865
From: www.ci.encinitas.ca.us
Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
One group promoting hydrogen as a power storage medium calls itself the "H2indenberg Society," deciding to address public paranoia head-on.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
04-17-02 | 04:54 PM
#8
Raised by beavers.
Joined: Oct 2001
Posts: 254
Likes: 0
From: Canada, Vancouver. Wave if you ever see me.
For a truly flying experience, fill the tubes with liquid nitrogen, and then go on your ride.
Wait a couple minutes, and when you hear the characteristic "BWHAM" sound, look around.
You now should be 40 meters in the air.
Wait a couple minutes, and when you hear the characteristic "BWHAM" sound, look around.
You now should be 40 meters in the air.
04-18-02 | 10:19 AM
#11
Originally posted by heybulldog
wonder what it would be like to ride with helium in the tires?
wonder what it would be like to ride with helium in the tires?
I think the only advantage would be psychological (cyclelogical?).
