+1 vote
in Machine Dynamics by (34.3k points)
In a locomotive, the ratio of the connecting rod length to the crank radius is kept very large in order to

(a) minimize the effect of primary forces

(b) minimize the effect of secondary forces

(c) have perfect balancing

(d) start the locomotive conveniently

The question was posed to me in an interview.

This interesting question is from Balancing of Several Masses Rotating in Different Planes topic in portion Balancing of Rotating Masses of Machine Dynamics

1 Answer

0 votes
by (38.6k points)
Right option is (b) minimize the effect of secondary forces

The explanation: As l increases FS decreases

Hence the ratio is kept large to avoid secondary forces for each balancing.

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