I first became aware of this engine when I saw it listed in a Bonham's auction and saved the photos and description. A few years later I have finally got round to making it.
The original large model has a bore of 1.5" and stroke of 4.5" I scaled it to suit a flywheel of 200mm diameter as that is a comfy size to machine from 8" diameter thick wall steel tube. All the other parts were either fabricated or cut from solid. Ouite pleased with how it turned out with a nice slow speed on 5psi and still a smooth runner when the airflow is opened up.
The original large model has a bore of 1.5" and stroke of 4.5" I scaled it to suit a flywheel of 200mm diameter as that is a comfy size to machine from 8" diameter thick wall steel tube. All the other parts were either fabricated or cut from solid. Ouite pleased with how it turned out with a nice slow speed on 5psi and still a smooth runner when the airflow is opened up.
