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+clc;funcprot(0);//EXAMPLE 17.10

+// Initialisation of Variables

+Db=0.7;.............................//Diameter of brake pulley in m

+d=0.025;............................//Diameter of the rope in m

+W=50;...............................//Load on the tight side of the rope in kg

+S=50;...............................//Spring balance reading in N

+N=900;..............................//Engine rpm

+mf=4;...............................//Rate of fuel consumption in kg/h

+C=44000;............................//Calorific value of fuel in kJ/kg

+g=9.81;.............................//Acceleration due to gravity in m/s^2

+//Calculations

+BP=(((W*g)-S)*%pi*(Db+d)*N)/(60*1000);........................//Brake power in kW

+bsfc=mf/BP;...................................................//Brake specific fuel consumption in kJ/hW-h

+disp(bsfc,"Brake specific fuel consumption (in kJ/hW-h)")

+etathB=(BP*3600)/(mf*C);.............................................//Brake thermal efficiency

+disp(etathB*100,"Brake thermal efficiency:")