Newbie, 1st post.
I have been pondering an idea that would ideally allow driving the pedal crank with the motor, and still retain full pedal function with the motor off. One could still use the pedals as a foot rest while motoring. Also allow a geared rear wheel hub to function.
I stumbled across another forum where a forum member made a vague reference to driving thru the crank. It turned out to be a jackshaft arrangement. Looked like it would work but not the solution I was hoping for.
Having a lot less life ahead of me than behind me Ive come to the conclusion that there arn't to many original ideas out there. If you can think of it, odds are someone somewhere already has. So I'm going to share my idea in hopes someone on the forum will have heard of or seen it done....or do it and share with the group.
Basic parts: 3pc crank, main shaft modified are retooled to accept a sprag clutch/bearing on one end and a bearing of the same OD on the other end.
(Because of load torque it may prove necessary to use two sprag's and omit the bearing)
This assembly is inserted in to a hollow outer shaft. Each end of this outer
shaft is fitted with a bearing. This whole assembly is inserted into
the existing bike crank cylinder. (about 2" ID) The "drive sprockets" left motor, and
right wheel, go on the outer hollow shaft and the pedals on the inner crank
shaft. (Where they were originally) It will help to draw this as you visualize it in your mind. Also google "Sprag" clutch if your unfamilar with them.
I have no doubt this scheme will work, but fitting it into the existing crank cylinder might be impossible. Kinda like 10lbs of stuff in a 5lb bag.
A new larger crank cylinder could be fitted to the bike in place of the original.
The rights to this idea (If it is original) belong to this forum and its members, to refine, expand, improve or change for the use and sharing of all on the forum.
Their are some clever guys on this forum, so hash it out guys.
BernieP, the "Old Dude"