February was a good month to stay indoors and construct another scale model. This time it was a model of a Hypocycloidal steam engine. That is just a fancy tongue twisting word for geared crank engine. The original engine was invented in 1802 in England by a gentleman named Matthew Murray.
Building of this model was pretty simple and straight forward. The most interesting part was machining the internal toothed ring gear, I done that on the milling machine using it like a hand powered vertical shaper. Even though it is a lot of work there is a lot of satisfaction in making your own gears, especially if they need to have a special shape of some kind. When finished the engine turned out to be smooth running with an interesting motion.
