A single-cylinder, two-stroke cycle model airplane engine with a displacement produces 1.42 kW of brake power at 23,000 RPM using glow plug ignition. The square engine uses 31.7 gm/min of castor...

A single-cylinder, two-stroke cycle model airplane engine with a displacement produces 1.42 kW of brake power at 23,000 RPM using glow plug ignition. The square engine uses 31.7 gm/min of castor oil–methanol–nitromethane fuel at an air–fuel ratio During intake scavenging, 65% of the incoming air–fuel mixture gets trapped in the cylinder, while 35% of it is lost with the exhaust before the exhaust port closes. Combustion efficiency n_c=0.94.

Calculate:

(a) Brake specific fuel consumption. [gm/kW-hr]

(b) Average piston speed. [m/sec]

(c) Unburned fuel exhausted to atmosphere. [gm/min]

(d) Torque. [N-m]