"Aaron Gwin chainless world cup winning run, the mystery explained "
- Thread starter TrumbullHucker
- Start date
looks like a trek
"So did Gwin benefit from riding chainless? Overall probably not but he will certainly have gained speed in some sections because of the lack of chain."
haha ok. Also--
"Gwin’s history with the Demo is mixed but he certainly seems to have adapted well to the shape and timing of the bike this season."
What is the timing of the bike? Is he running higher octane?
haha ok. Also--
"Gwin’s history with the Demo is mixed but he certainly seems to have adapted well to the shape and timing of the bike this season."
What is the timing of the bike? Is he running higher octane?
I think I'm more curious about the effect of a 35mph headwind vs. none
Science demands answers.
"
2) When riding into a headwind, does going faster make it harder? Is the relationship linear or worse?
I did some research and found this equation:
Force of drag = 1/2 x D x V^2 x Cd x A
D = The density of air.
V = The relative velocity of air hitting the object (^2 means squared).
Cd = The drag coefficient.
A = The area exposed to the wind.
That squared velocity is the literal drag on trying to go faster into the wind. It doesn't get harder as a direct relationship, it gets harder, SQUARED.
If you are going 15 mph into the head wind, you have some drag force (with no units of measurement, so let's say it is "15".) But if you accelerate to 20 mph, a 5 mph increase, your new drag force is 5 squared = "25" above where you started at 15 mph.
Since you started at a drag force of 15, then 15 + 25 = 40, which is the new force being exerted on you by the wind when you are moving along at 20 mph. (This assumes a steady headwind; of course, as the headwind increases, so does the drag force – again, at much more than a linear progression.)
Of course, you must overcome (or best deal with) this drag force by muscle strength and technique (your best, most aero position on the bike) -- and you may be helped by an aerodynamic bike as well.
So, to answer the question, YES, going faster into a headwind makes it harder. And the relationship is not linear; it is “worse” -- drag force into a head wind increases as the SQUARE of your velocity increase."
http://www.roadbikerider.com/riding-skills/safety-skills/physics-riding-wind
Again Road Dorks...
2) When riding into a headwind, does going faster make it harder? Is the relationship linear or worse?
I did some research and found this equation:
Force of drag = 1/2 x D x V^2 x Cd x A
D = The density of air.
V = The relative velocity of air hitting the object (^2 means squared).
Cd = The drag coefficient.
A = The area exposed to the wind.
That squared velocity is the literal drag on trying to go faster into the wind. It doesn't get harder as a direct relationship, it gets harder, SQUARED.
If you are going 15 mph into the head wind, you have some drag force (with no units of measurement, so let's say it is "15".) But if you accelerate to 20 mph, a 5 mph increase, your new drag force is 5 squared = "25" above where you started at 15 mph.
Since you started at a drag force of 15, then 15 + 25 = 40, which is the new force being exerted on you by the wind when you are moving along at 20 mph. (This assumes a steady headwind; of course, as the headwind increases, so does the drag force – again, at much more than a linear progression.)
Of course, you must overcome (or best deal with) this drag force by muscle strength and technique (your best, most aero position on the bike) -- and you may be helped by an aerodynamic bike as well.
So, to answer the question, YES, going faster into a headwind makes it harder. And the relationship is not linear; it is “worse” -- drag force into a head wind increases as the SQUARE of your velocity increase."
http://www.roadbikerider.com/riding-skills/safety-skills/physics-riding-wind
Again Road Dorks...
jesus, did someone really write that article?
atleast the pictures were pretty
atleast the pictures were pretty
Quantum acceleration FTW.
Anyone who thinks a chainless bike would be faster on a dh course then a bike with a chain, because the supposedly better working suspension makes up for more seconds multiple pedal strokes down a 3 minute run could win... Is a fucking retard...
Gwin wanted it harder the the rest of the field and is obviously a better rider then most.
No rocket science and no mystery behind it.
Now move along, theres really nothing to see...
Gwin wanted it harder the the rest of the field and is obviously a better rider then most.
No rocket science and no mystery behind it.
Now move along, theres really nothing to see...
Last edited:
thank you for cliff noting that to me. no way in hell i was going to go back and read it.
TL; DR - pretty sure Gwin was faster because magnets...
Not using brakes = going faster = winner.
that's a true
Those special magnets affecting carbon painted aluminum bikes
ftfy
Well Mr. Smart Guy, maybe you can explain how they work...I'm with Juggz on this oneThose special magnets affecting carbon painted aluminum bikes
Let's talk about the real issue here.
Steve Jones doesn't even fucking speak english anymore.
Ambitions of accuracy some way off, even with a chain.
Except you cannot power pedal your way out of problem, this required something more refined, something more sophisticated that a stand up pedal act into a head on wind.
It's like listening to some babbling beat poet with a beret, puffing the tea.
Steve Jones doesn't even fucking speak english anymore.
Ambitions of accuracy some way off, even with a chain.
Except you cannot power pedal your way out of problem, this required something more refined, something more sophisticated that a stand up pedal act into a head on wind.
It's like listening to some babbling beat poet with a beret, puffing the tea.
UCI should have checked his bike for this:
Still would need a chain to get the power to the rear wheel. Oh, I forgot....magnets!
You're making the classic mistake of expecting anything a Welshman says to make any sense other for entertainment value.
just gonna help you out here with a sincere response-- the wheel going up and down in travel is stretching the chain out, since there is a non-concentric pivot between crank and wheel. There is room for the chain to grow in the derailleur pulleys, but the crank or wheel has to rotate to accommodate that, which takes energy. Net result is that the bike does move through travel differently without a chain. Try it.
Last edited: