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This thread is privately moderated by Jack Crossfire, who may elect to delete unwanted replies.
Jun 21, 2014, 04:28 PM
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2 wheels are cheaper than 3

Self balancing motorcycles have been promised forever. Self balancing is the key to any robotic motorcycle. Some tried reaction wheels. Some tried legs to push themselves back up after falling over. has been working on one since 2012 & recently bought a lot of advertizing.

There's 1 drawing of 2 control moment gyros. They claim thousands of ft-lbs of torque. The videos are carefully designed to have forces pushing at very low points, for short periods of time, to minimize the angular momentum & not saturate the gyros. No turns are shown. It needs a fancy turning algorithm to desaturate the gyros.

It needs to deploy its automatic kick stands or ask the driver to stick a foot out, if it's stationary for too long. It hardly seems worth the complexity & mass, just so the driver can be protected from the weather.

There are a few seconds revealing actual gyro assemblies. It takes 2. They have to be on separate gimbals, in addition to the spin motors. In a tandem wheel platform, 1 fixed gyro could probably do the job.

The thing boom has definitely replaced the bit boom. It all started from Steve Jobless's emphasis on product design. Now all those product designers who came to work on iPhones are moving to functional designs, fueling a robotics boom. It just proving hard to translate all that artwork skill to practical physics.
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