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Re: Engines
ya, rotary doesnt use cams or moving valves. they rotar piston acts like a valve (same as 2 cycle engines) and there are less moving parts and nothing has to change direction in a rotary. If taken care of properly (roaries are very diference from other ottocycle engines as far as design and mentanience go) rotaries will last much longer and it is possible to build Mazda's litlls 13B up to well over 600hp. and that 600+ hp is a whole lot more reliable than if you where to build up a normal 1.3l piston engine up to 600+ hp. however. the only flat heads still being used today are in lawn mowers. and even some lawn mowers have OHV and OHC. DOHC is best performance wise and they are about the same on a reliablity stance compared to SOHC. there is also QOHC (quad over head cams) for V engines with 4 valves per cylender.
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