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9. Estimate the time required for flame propagation in a typical SI engine if the turbulent flame speed is 5 m/s, bore size is 75

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9. Estimate the time required for flame propagation in a typical SI engine if the turbulent flame speed is 5 m/s, bore size is 75 mm, and igniter is located at the top of the cylinder. 10. Explain why a small ignition spot (or too little ignition energy) fails to ignite the flame

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