A rotary engineâs housing is a simple epitrochiod of two circles. The rotor spins eccentrically inside the housing, thus changing the volume of three spaces (chambers) formed between the two. Rotary engines share the same four-stroke sequence of piston engines: intake, compression, power, and exhaust.
Fibre-reinforced plastic. Fibre-reinforced plastic (FRP) (also called fibre-reinforced polymer, or fiber-reinforced plastic) is a composite material made of a polymer matrix reinforced with fibres. The fibres are usually glass, carbon, aramid, or basalt. Rarely, other fibres such as paper, wood, or asbestos have been used.
Tail of a radio-controlled helicopter, made of CFRP. Carbon fiber reinforced polymer, carbon fiber reinforced plastic or carbon fiber reinforced thermoplastic (CFRP, CRP, CFRTP or often simply carbon fiber, or even carbon), is an extremely strong and light fiber-reinforced plastic which contains carbon fibers.