Your question isn't clear. Are you asking WHY reciprocating engines for aircraft are called heat engines, or are you asking whether or not they are considered heat engines? Or are you asking something else entirely? Heat engines include many types of engines, and probably all of them. The term simply describes any type of engine that uses heat to generate power. Reciprocating engines for aircraft are simply piston-driven (reciprocating) internal combustion engines. They usually burn higher octane low-lead gasoline. The higher octane helps the engines burn fuel more efficiently, which helps high up in the air where the varying oxygen content and turbulence may diminish the less-efficient lower-octane fuels. Not all aircraft use reciprocating engines. Some other aircraft engine types are jet engines and turbo-prop engines. Both of these run on jet fuel. They differ in that jet engines completely eliminate props (propellers) and work by creating thrust from pressurized burning fuel. Turbo props are a sort of hybrid, where jet fuel powers the props, which in turn create movement in the same way that reciprocating engines do.
A reciprocating engine is a type of internal combustion engine, where the combustion of fuel generates power. Therefore, a reciprocating engine is not a combustion generator itself, but rather a machine that uses combustion to produce mechanical energy.
A broaching tool - or a reciprocating machining process such as a shaper, see the link in the resources below.
An opposed-piston engine is a reciprocating internal combustion engine in which each cylinder has a piston at both ends, and no cylinder head.Whereas the radial engine is a reciprocating type internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel.
Internal parts of all aircraft include many tanks, pumps, generators, hydraulic accumulators, electric motors and many other systems.
all car engines are internal combustion most car engines are Reciprocating piston some mazdas use wankel rotary engines hybrids use reciprocating piston engines in combination with electric motors
The two types of mechanical engine are reciprocating and rotary. They can also be internal or external combustion. These can be further sub-divided.
The up and down movement of a piston is called reciprocating motion. This motion is essential in internal combustion engines where the reciprocating motion of the pistons converts the pressure created by burning fuel into rotational motion to drive the vehicle.
A car
Reciprocating engines (piston engines) are internal combustion engines. Rotary engines ( Wankel engine) is also an internal combustion engine. In general, all types of engines in which the combustion chamber is an integrating part of the engine is considered a internal combustion engine.
communication system
How about the fly wheel of an internal combustion englne.