|Pedaling with hands and feet. UCI legal?||ohmk1|
Apr 16, 2003 8:32 AM
|I recently read an interview with speed record breaking HPV designer Gardner Martin. He stated that, "a bicycle that you can crank with boths hands and feet is definitely a superior bicycle." He also said, "On hills you can generate thirty percent more power." He also went on that you won't really have to use very low gears when climbing.
Which left me wondering if some pro team were nuts enough to try this, would it be UCI legal? Granted the bike will be a little heavier, and you really have to start building up your arm strength, but it would be like moving up from a 4 cylinder to 6.
|not even close||DougSloan|
Apr 16, 2003 8:36 AM
|HPVs aren't legal. Any novel device is presumed illegal, until permitted. It would probably violate every one of the bike design rules.
Apr 16, 2003 8:41 AM
scroll down to SECTION 2 BICYCLES, Definition 1.3.006... around page 44.
The bicycle shall be propelled solely, through a chainset, by the legs moving in a circular movement.
Apr 16, 2003 8:53 AM
|I didn't mean racing an hpv, I meant racing a diamond framed bike with both a hand crank, and a regualr crankset. Either way, I guess it won't be allowed. I do wonder what such a beast would look like.|
|I'm sure some have built them||DougSloan|
Apr 16, 2003 8:55 AM
|I bet if you do a Google search for "hand crank bicycle" you'll find a few. Everything imaginable bike related has been done, probably a hundred years ago.
|I want to see someone climb standing on one nm||DougSloan|
Apr 16, 2003 8:56 AM
Apr 16, 2003 2:24 PM
|It is possible to biomechanically combine the arm power of
hand cranks with the leg power of normal cranks, it is done
with a linear pedaling style, eliminates the dead spot area
which gives 3 to 5 mins. of extra pedaling per hour and was responsible for five Tour de France wins
mainly because of the superiority that it gave in time trials which were long in those days. Hand cranks are not needed because with linear pedaling it is possible to use
the maximum pulling resistance of the arm to increase the
power that is applied to the pedal and extend it into the
dead spot area. That is impossible with normal round
pedaling. To get most benefit by eliminating unwanted
leverage, you would need a set of firmly fixed "Scott Rake"
|Just like Cat 5's.||MR_GRUMPY|
Apr 16, 2003 9:05 AM
|I can just picture a bunch of riders with cranks on their stems. It would be like a ................................................................Cat 5 crit.|
|As an aside = a false premise||Kerry|
Apr 16, 2003 4:49 PM
|All the claims about getting huge boosts in power by engaging more muscles presumes there is no aerobic limitation, only muscle. Not true. When you're going flat out using the largest muscles in your body, there's not much O2 left to supply some other muscle system. A top XC skiier (using arms and legs) has about the same VO2 MAX as a top cyclist.|
|re: Pedaling with hands and feet. UCI legal?||JBergland|
Apr 17, 2003 5:13 AM
|"a bicycle that you can crank with boths hands and feet is definitely a superior bicycle."
Superior in what ways??
""On hills you can generate thirty percent more power." He also went on that you won't really have to use very low gears when climbing."
95% of HPV are some form or variation of 'bent'... the other 5% is mostly stuff that, although might be interesting to look at and talk about, is not very efficient.
On the flats and down-hills, bents are fast. They are aero and have a low center of gravity. However, try climbing with a bent... I don't care if you use your arms & legs and anything else you want... they will not match a traditional bike in speed OR efficiency.