Final answer:
Both Tech A and Tech B are correct regarding W engines and rotary engines, respectively. The flywheel in conventional piston engines smooths out vibrations by providing rotational inertia to even out power delivery. The Otto cycle and PV work in internal combustion engines are essential concepts for understanding how these engines convert energy into motion.
Step-by-step explanation:
Tech A is correct when stating that the W engine consists of two VR cylinder banks set in a deeper V arrangement to each other. The design of a W engine is such that it combines two V-shaped engines onto one crankshaft, resembling the letter W when viewed from the front. Tech B is also correct in saying that rotary engines are compact and powerful for their size, but do not use conventional pistons; instead, they utilize a triangular rotor that rotates within a chamber.
The subject of flywheels in conventional piston engines addresses why these components are used to smooth out engine vibrations. The uneven thrust of individual piston firings in an engine causes vibrations, which are mitigated by the flywheel. The flywheel provides rotational inertia that helps maintain the crankshaft's momentum, evening out the power delivery and reducing the perceived vibration.
The simplified Otto cycle is a process used in internal combustion engines and depicted in a PV diagram, where work is done on the gas and by the gas at different stages, resulting in a net work output. In these engines, such as in a steam engine, PV work is critical in converting the expanding gas's energy into mechanical motion, which notably fueled advancements during the Industrial Revolution.