Red version: slinging the new crank underneath
(Previous post: ‘Red version: new lunging and biting crank drive: ‘topside’‘)
The new, ‘slung’ crank drive looks like this:
After making the new drive and mounting it on the top (see link above) I decided it would be easier to relocate it on the underside and then make another one for the top side (besides it was the wrong colour!)
The notes, photos & videos below show how this was achieved.
The lower space frame and rear legs were first removed.
The new crank drive was then removed from the top and slung underneath (with a few small modifications).
The photo above shows a simple crank con-rod made from aluminum flat bar but a more complex version was needed, as shown below.
The crank was wired up and the space frame undercarriage re-attatched.
A view from underneath…
The videos below show it working.
Next post : creating the topside crank drive.