Here is the idea from the other thread. A two speed select using a double sided compensator design.
The design is pretty versatile and again simple. The first and second gears are freewheeling. The chain for both of them can go to the wheel or to a motor shaft as per your needs or materials on hand. The selector clutch or pawl moves between gears on a keyed shaft and rotates with the keyed shaft. It has three positions: 1st, neutral, 2nd. It engages by pressing against either gear. The third sprocket has a chain that goes to the wheel or motor shaft (per your needs) and is firmly attached to the keyed shaft. http://img.photobucket.com/albums/v424/slodown27/concepts/2speedclutchusingcompensator.jpg Selection engagement can be a lever like on a VW clutch or 2 hydraulic brake cylinders that engage 2 brake calipers (one going one way then one going the other) like from gokarts. I figure adjust so that the brakes dont grab and, well, brake. Ensure that a disconnect switch activates when switching gears or in neutral so that the motor doesnt over rev. If the motor is off, there shouldnt be much drag when engaging or the sudden grab like with a dogleg. http://img.photobucket.com/albums/v424/slodown27/concepts/selection.jpg __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
