2 Wheeler - Gyro cycle

I've heard of gyros being used on luxury boats to counter the rocking motion. I think the ISS also uses gyros to re-position itself. You could use a gyro on a 2w bike, but they do consume power and are weighty. There is also an increased risk relying on active stability vs passive stability. But these are just engineering challenges :D

There may not be one for sale today, but there is at least one other company pursuing it. Lingyun Self Balancing Motorcycle | DeepResource (wordpress.com) and it most likely has the backing of the Chinese government

Many variations of the concept. None I could find that were in the market as vehicles that can be purchased. My guess not enough capital to bring production to market, not a good value proposition (To expensive for what you get) and limited niche market making steady state profitable operations unachievable. Possibly to many competing concepts with no one standing out enough to capture the imagination

https://www.aptera.us/forum/aptera-design-discussion/overall-structure-perportion-alternatives

Could you have been hearing a motor applying torque to the gyro, and not the bearing?

Fun concept!

Have you ever played with a powerful gyro?

If you get the chance, do it! Pick it up; tilt it.

What happens? 🤔

A: It twists in your hands. Unexpectedly. Forcefully. 😮

Lit Motors, I saw in a video, used a pair of gyros rotating in opposite directions which avoided the twisting when leaning. However I could hear the bearings strain against their axes as the cycle was pushed sideways. That noise means force was exerted and power was expended by the batteries to resist it. That force would go up proportionally with the speed.

What happens if one of the bearings or gyro motors wore out? Seized?

A: Spin-out! 🤕

No thank you! 🙄

There have been several gyro stabilized vehicles over the years (back to the 1960s). I have never found out what caused them to fail.