3. A rear mounted air-cooled SI engine has 6 cylinders, 3.375 in x 2.6 in bore and stroke respectively, a compression ratio of 8 and developed 80 BHP at 4400 rpm. It was noted that brake thermal efficiency is 26 %, volumetric efficiency is 74 % and mechanical efficiency is 71 %. For the ideal cycle, conditions at the start of compression are 14.7 psia, 140 o F. Calculate a) Percent clearance, b) P, T at the end of compression, c) Brake engine efficiency, d) mass flow rate of air, e) torque (lb-ft), f) AF with Q hv = 19100 BTU/lb fuel

Elements Of Electromagnetics
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3. A rear mounted air-cooled SI engine has 6 cylinders, 3.375 in x 2.6 in bore and stroke respectively, a
compression ratio of 8 and developed 80 BHP at 4400 rpm. It was noted that brake thermal efficiency is
26 %, volumetric efficiency is 74 % and mechanical efficiency is 71 %. For the ideal cycle, conditions at
the start of compression are 14.7 psia, 140 o F.
Calculate a) Percent clearance, b) P, T at the end of compression, c) Brake engine efficiency, d) mass
flow rate of air, e) torque (lb-ft), f) AF with Q hv = 19100 BTU/lb fuel

3. A rear mounted air-cooled SI engine has 6 cylinders, 3.375 in x 2.6 in bore and stroke respectively, a
compression ratio of 8 and developed 80 BHP at 4400 rpm. It was noted that brake thermal efficiency is
26 %, volumetric efficiency is 74 % and mechanical efficiency is 71 %. For the ideal cycle, conditions at
the start of compression are 14.7 psia, 140 °F.
Calculate a) Percent clearance, b) P, T at the end of compression, c) Brake engine efficiency, d) mass
flow rate of air, e) torque (Ib-ft), f) AF with Qy = 19100 BTU/lb fuel
Transcribed Image Text:3. A rear mounted air-cooled SI engine has 6 cylinders, 3.375 in x 2.6 in bore and stroke respectively, a compression ratio of 8 and developed 80 BHP at 4400 rpm. It was noted that brake thermal efficiency is 26 %, volumetric efficiency is 74 % and mechanical efficiency is 71 %. For the ideal cycle, conditions at the start of compression are 14.7 psia, 140 °F. Calculate a) Percent clearance, b) P, T at the end of compression, c) Brake engine efficiency, d) mass flow rate of air, e) torque (Ib-ft), f) AF with Qy = 19100 BTU/lb fuel
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