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Actually i wanna find the required power of an a single cylinder air cooled 4 stroke OHV engine. i have calculated three power losses, power loss against road gradient (Pg), rolling resistance (Pr) and drag (Pd) using the following formulae:

Pg=M*g*v*grad=1.095 hp

M(mass of the prototype car)=120kg, g=9.8 m/s^2, v(prototype car velocity)=13.88 m/s, road gradient= 5% (0.05)

Pr=RRC*M*g*v=0.109 hp

RRC (rolling resistance coefficient)=0.005 for a bicycle tire we are using in our prototype car

Pd=0.5*rho*v^3*Cd*A = 0.030 hp

rho=1.099 kg/m^3, Cd (Coefficient of drag)=0.04 in case of our prototype car, A=0.384 m^2

Net power losses=Pg+Pr+Pd=1.234 hp.

Now please tell me can i use an engine of 1.3 hp of 35cc volumetric capacity in our prototype three wheeled car. Generator is the only accessory that will be connected with the engine to charge the battery.13.88 m/s will be the max. speed of our prototype car, 120 kg is the mass of the prototype with driver. reply soon please

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# Calculation of an engine power

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