No mate, any flat engine that has opposed cylinders that reach TDC at the same time, be it a twin, a four, a six etc.
Subaru Impreza for example is a boxer engine.
so one of the very few thing i know about my superdream engine is that it is unusual in that both pistons fire at once, is there a special name for this,is it a good or bad thing?
Thats different again Julie. It called 'wasted spark' ignition.
Both cylinders fire at the same time but only one cylinder is on the combustion stroke.
Isit a good or bad thing .. neither really, its done for simplicity & cheapness in production.
Although any performance engine will have a 'single fire' sequential ignition system.
Napier built them for locos Delta as the cylinders form a triangle.
What about opposed pistons in a single cylinder with bell arms and a single crankshaft?
Did anyone build an horizontally opposed engine with common crank pins. I always tried to imagine what my old BMW boxer would have run like with a single crank pin. I bet it would be uncontrolable but a right laugh!
A flat engine is an internal combustion engine with multiple pistons that all move in the horizontal plane. The most popular and significant layout has cylinders arranged in two banks on either side of a single crankshaft, generally known as "boxers". ...
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