Dyno
Panhard Dyno Rig continued
02/06/12 15:52
Over the next few days, I hope to progress this a little further.
This is the raw tensioning wheel and simple pivoting lever. At the moment, the tensioner will only be in contact with the chain when the wheel is raised off the dyno roller. Initially I thought of using a spring to tension it, but I might use a pull rod instead, or a spring and rod combo to allow for a little chain slop.
So far it seems to work well by just turning the wheel by hand, in fact I could use this tensioner to lift the wheel & swinging arm, because the chain pulls on the sprocket and lifts the wheel when I apply too much pressure on the tensioning arm.
This is the raw tensioning wheel and simple pivoting lever. At the moment, the tensioner will only be in contact with the chain when the wheel is raised off the dyno roller. Initially I thought of using a spring to tension it, but I might use a pull rod instead, or a spring and rod combo to allow for a little chain slop.
So far it seems to work well by just turning the wheel by hand, in fact I could use this tensioner to lift the wheel & swinging arm, because the chain pulls on the sprocket and lifts the wheel when I apply too much pressure on the tensioning arm.
Comments
Panhard Dyno Rig
29/05/12 19:14
I am still waiting for pistons, so it’s time to refine the dyno rig that I will be using for testing the Panhard engines.
I was able to collect some new linkages from the laser cutters, and I fitted these Sunday. Unfortunately, the new links with revised centres, caused the chain to get too slack in the “wheel off the roller position”, so I looked at increasing the flywheel sprocket.
I did not want to change the chain, as the same chain will be used on the motorcycle engine, kart engine and Panhard rig. I could have lifted the Panhard engine rig upwards, but then I’d have to do the same for the kart rig, as this too is mounted on the top part of the wheel subframe.
Today I managed to get a 19T 5/8” taper lock simplex sprocket, which increases the tooth count by one. However when I fitted it to the Panhard engine, there was too much chain tension, so by swapping out the linkages for a slightly longer version, I could just clear the tyre from the roller in the lift position, and also apply sufficient tension in the dyno test mode.
This is a close up of the lock mechanism, that loads the tyre on the roller and also holds the tyre clear of the roller, which is shown in the picture above. The tensioning mechanism pulls on the existing swinging arm dog bone connections, and the position is held via a locking pin, that engages within two holes. The hole in the box section was for an earlier version.
So just to recap, the Panhard engine directly drives the motorcycle wheel via a chain, which in turn spins the inertia roller when the tyre is tensioned into it.
I was able to collect some new linkages from the laser cutters, and I fitted these Sunday. Unfortunately, the new links with revised centres, caused the chain to get too slack in the “wheel off the roller position”, so I looked at increasing the flywheel sprocket.
I did not want to change the chain, as the same chain will be used on the motorcycle engine, kart engine and Panhard rig. I could have lifted the Panhard engine rig upwards, but then I’d have to do the same for the kart rig, as this too is mounted on the top part of the wheel subframe.
Today I managed to get a 19T 5/8” taper lock simplex sprocket, which increases the tooth count by one. However when I fitted it to the Panhard engine, there was too much chain tension, so by swapping out the linkages for a slightly longer version, I could just clear the tyre from the roller in the lift position, and also apply sufficient tension in the dyno test mode.
This is a close up of the lock mechanism, that loads the tyre on the roller and also holds the tyre clear of the roller, which is shown in the picture above. The tensioning mechanism pulls on the existing swinging arm dog bone connections, and the position is held via a locking pin, that engages within two holes. The hole in the box section was for an earlier version.
So just to recap, the Panhard engine directly drives the motorcycle wheel via a chain, which in turn spins the inertia roller when the tyre is tensioned into it.
