Building the front tube of the frame

The stoker cranks are mouted on an extendable boom. For simplicity I use a readymade boom from a recumbent supplier. On the front of the frame I need a tube that slides around this boom.

To do this a carbon fibre tubes with integrated clamping flanges has been made using the boom as a mould. As it is nice to be able to separate mould and tube, I cover the boom in cling film.

A couple of hours work later 6 layers of 200gr/m2 carbonfibre cloth are covered with peelply in a vacuum bag.

The end result is 130 gram of very stiff clamping tube.