A hurdy gurdy is a very interesting instrument where a hand cranked wheel is used to rub strings like a violin bow.
Now I understand that the hand crank is important to this instrument and that by stopping, starting and reversing it you can make interesting variations in the sound.
Playing skill comes from both the handle and playing the keys.
There is also a lot of music where the crank is turned continuously. For that restricted case of the skill comes from playing the keys alone.
An obvious 'innovation' would be to replace the hand crank with a continuously turning wheel powered by a motor or even a foot pedal like a potter's wheel. This would free up the other hand to operate even more keys (or for a one handed player to play an ordinary hurdy gurdy).
Since nothing is new under the sun, this must have been tried long ago. So my question is: What are such instruments called and are there any examples of them in use?