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A four stroke limited pressure cycle (dual) engine draws 1.2 kg/sec of air at 1.03kg/cm2 and 27°C. Compression ratio of the cycle is 16. Pressure ratio during constant volume heat addition is 2.0. Total heat added is equal to 550 kcal/kg of air in the cylinder. Determine

(i)     pressure, volume and temperature at all salient points,

(ii) % of heat added during constant pressure process,

(iii)   cut-off ratio

(iv)   thermal efficiency,

(v)    mean effective pressure.

Represent the cycle on p—V and T—s planes. Assume Cp = 0.24 kcal/kg°K and Cv = 0.17 kcal/kg°K.

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