01-07-2020, 03:04 PM
I have heard of flexible flywheels for sevens which help with the flex of the crank allowing the centre of the flywheel to move with the bowed crank. I believe this is achieved by parting off the centre in a lathe then rejoining the centre to the outer part with flexible steel straps bolted between the two. Some years ago I went on the Molentocht rally and met a seven enthusiast and engineer from March in Cambridge who had done this modification.
John Mason.
John Mason.
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.