Teacherjh wrote:

For example, separate cylinders are disasters.

What are "separate cylinders" and what's the alternative? (unless you mean the
wankel)

Each cylinder on a typical Lycoming or Continental engine can be removed
independently. All of the cylinders in a typical automobile engine are cast in a
single unit (known as the block). This is also true of many water-cooled aircraft
engines and many motorcycle engines.

George Patterson
In Idaho, tossing a rattlesnake into a crowded room is felony assault.
In Tennessee, it's evangelism.