In this article ,I have mentioned why main engine exhaust valve does not have spring ? Or why there is no spring in exhaust valve of main engine ?
- Spring required for exhaust valve will be large with large diameter & the coil diameter is also thick.Heavy coils will be under the effect of bending and twisting critically at every revolution.
- If there is large spring then large india is also required to open which lead to sluggish operation.
- Spring may break frequently and seat of the valve get damaged.This causes ineffective tight sealing of face.