Here's what driving with bad piston rings can do to your engine

Piston rings are the seals in your cylinders, giving you better compression and power, but what happens if they wear or break ...
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One of Ford's most complicated engines had no crankshaft, two pistons, one cylinder, a turbine, and was mounted in a tractor

Some of the world’s most complicated engines were created to achieve a specific objective. These engines were built to satisfy monster power requirements or to hit a high level of performance within ...
NextBigFuture

Opposed Piston and Other Engines that could deliver 100 mpg

1. EcoMotors is developing high-efficiency engines — specifically the unique opoc (Opposed Piston Opposed Cylinder) engine — for use in cars, light trucks, marine applications, agricultural vehicles, ...
Hackaday

piston engine

Everyone generally knows about piston and rotary engines, with many a flamewar having been waged over the pros and cons of each design. The “correct” answer is thus to combine both into a single ...