1. Putt-Putt: The wonderful world of heat engines

2. How does it work?

3. The Question
How does the length of the exhaust tube correlate with the strength of the engine?
How does the size of the boiler affect engine performance?

4. The Procedure
Build a multitude of engines, each with a varying boiler length and long exhaust pipes.
Test the engines in a boat and a known length of water. Record the time it takes the engine to complete the route.
Cut off a section of exhaust pipe and go to step two.

5. Bad The Reality In order to seal the engines, epoxy was used
Epoxy burns
Three of the engines lost their seals
Bad

6. The Results The shorter the exhaust tube the lower the performance.
Perhaps the shorter the boiler, the better the performance.