Tilmann Posted May 24, 2016 Share Posted May 24, 2016 This may not be as far off topic to EUCs as one might think. Look at this astonishing behaviour of a competition bicycle after a fall: Nice bike, huh? Link to comment Share on other sites More sharing options...
John Eucist Posted May 24, 2016 Share Posted May 24, 2016 Bad "hide-cheating" technology. Link to comment Share on other sites More sharing options...
Tilmann Posted May 24, 2016 Author Share Posted May 24, 2016 5 minutes ago, John Eucist said: Bad "hide-cheating" technology. Very true! Yet, believing in the fairness of competition cycling was a bit of a stretch anyway Without endorsing this "very special" application: the apparent miniaturization and likely weight reduction makes me curious. Also: as the noise caused by any gearbox would be a dead giveaway, such a small direct drive hub motor must develop an unbelievable torque to turn such a large diameter wheel. Hopefully some forensics on this cheating technology goes public. The good thing: they likely didn't apply for a patent ... Link to comment Share on other sites More sharing options...
lizardmech Posted May 25, 2016 Share Posted May 25, 2016 I found them for sale the other month, they're basically fairly mundane high RPM RC car motors, the complex part is the gearing it had custom made metal gearing with 2 planetary reduction gears in a tube, then it had to have a carbon fiber bike frame built over it. Power to weight ratios is much higher on low torque high RPM motors, so they can't use slow high torque direct drive motors. Link to comment Share on other sites More sharing options...
OliverH Posted May 25, 2016 Share Posted May 25, 2016 Like this? Link to comment Share on other sites More sharing options...
SlowMo Posted May 25, 2016 Share Posted May 25, 2016 Here's a better demonstration video: Link to comment Share on other sites More sharing options...
Keith Posted May 25, 2016 Share Posted May 25, 2016 Chatting to my brother, a keen cyclist, about this he was saying it's not only motor technology that the pro-cycling community have so far failed to keep up with it is also modern materials. To prevent dangerously weak bikes there is a lower limit on racing cycle weight. These days that is 2Kg higher than the bike a man in the street can walk into a shop and buy so they have to add weight to racing bikes to be legal. Might as well add that weight in motor and batteries;-) 16 hours ago, Tilmann said: as the noise caused by any gearbox would be a dead giveaway, such a small direct drive hub motor must develop an unbelievable torque to turn such a large diameter wheel. Hopefully some forensics on this cheating technology goes public. The good thing: they likely didn't apply for a patent ... Beautiful helically cut gears as in the video @SlowMo showed won't make a noticeable noise over the bikes own gear train and high torque isn't needed as these motors are designed to give the rider an advantage - not actually drive the bike. Ideally you don't want them working at all from a standstill as that would be a bit of a giveaway. If a racing cyclist can maintain 400W of power then if the motor was only adding 40W they would have a 10% advantage, I suspect it manages a fair bit more than that. Link to comment Share on other sites More sharing options...
Mono Posted May 25, 2016 Share Posted May 25, 2016 9 hours ago, Keith said: If a racing cyclist can maintain 400W of power then if the motor was only adding 40W they would have a 10% advantage, I suspect it manages a fair bit more than that. I think he says 150W in the vid (0:58). 10 hours ago, OliverH said: Like this? For the spin at 2:27 it's hard to see any other explanation than that there is a motor in the bike. It's amazing how a whole community can apparently entirely ignore such obvious evidence. Link to comment Share on other sites More sharing options...
MetricUSA Posted May 25, 2016 Share Posted May 25, 2016 Can someone dope my airwheel q3??? PLEASE I knew Armstrong was not on drugs, they should have thrown his bike in jail! Link to comment Share on other sites More sharing options...
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