Question

In a horizontal engine, the weight of the reciprocating parts also add/subtract to the piston effort.

(a) True

(b) False

This question was posed to me in examination.

Asked question is from Forces on the Reciprocating Parts of an Engine Neglecting Weight of the Connecting Rod topic in section Inertia Forces in Reciprocating Parts of Machine Dynamics

Answer 1

Right option is (b) False

To elaborate: The weight of the reciprocating parts of the engine add or subtract to the piston effort only in a vertical engine and it depends on the motion of the piston.