This model makes use of two Meccano parts that I have never used before — the Fan and the 5¼” Hub Disc. It was built for the ‘Never Used Parts’ Secretary’s Challenge at the South East London Meccano Club.
The unicyclist
The unicyclist circles around the Hub Disc, propelled by a couple of pulleys and a small motor in the base.
A close-up of the pulleys and motor