V-4 Marine Steam Engine
As on the original, the throttle, lubricator, drain valve, and forward/reverse mechanism are all functional on Scotty’s scale model.
V-4 Marine Steam Engine
This engine was originally displayed in a wooden launch, and it won first prize in the 1995 Machinist’s Challenge Contest.
V-4 Marine Steam Engine
A proper display sets off the 4-cylinder engine, giving it a sense of size and purpose.
Steam Engine
A smaller steam engine built by Scotty—although this is not his smallest.
Inline 4-Cylinder Engine
An inline 4-cylinder compressed air engine.
Steam Engines
This display board holds three very tiny steam engines, with each having a different configuration. Each engine has an air line going to it, so they can be run on compressed air for demonstrations.
Double-Acting Steam Engine
A closer look at the double-acting steam engine that sits on the far right of the display board pictured before this. This is the smallest engine on the board.
Double-Acting Steam Engine
This tiny engine has a horizontally positioned oscillating cylinder, and a flywheel on a shaft that drives a pulley.
Double-Acting Steam Engine
Another double-acting engine, which can be seen on the left side of the display board. This engine is similar to the other double-acting engine, but is about twice the size. It drives a pinion gear as a power take-off.
Single-Acting Steam Engine
The final engine on the display board is this single-acting engine, which sits in the middle. The miniature engine has a vertical orientation.
Single-Acting Steam Engine
J.C. Tanner Tugboat
Scotty’s tiny model J.C. Tanner tugboat. The boat is about 5” from stem to stern, and the cabin is removable to show the power plant.
J.C. Tanner Tugboat
The cabin is removed here to show the internal workings. Scotty said that this boat, “ran like crazy,” in his bathtub when the air line was connected.
J.C. Tanner Tugboat
A very tiny steam engine and boiler were modeled inside the plastic tugboat. Despite the boiler being too small to actually fire, the engine does power the boat’s propeller shaft when running on compressed air.
Steam Engine
This steam engine with pump circulates water in the tank on the left.