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Homework Help: Morse test

  1. Jan 22, 2010 #1
    Morse test!!!!

    A morse test is sued to determine the mechanical efficiency of a petrol engine. these are the results
    Torque (Nm)
    No plugs shorted 91
    no1 shorted 63
    no2 shorted 64
    no 3 shorted 65
    no4 shorted 65

    engine was ran at 2000rpm. determine the engines indicated power.

    now i have an equation but its for using brake power. my equation is:
    A= Brake power with all cylinders working
    B1,B2,B3 and B4= Brake power of the engine with each of the turned off in turn
    Using the formula:
    Total Indicated power = (A-B1) + (A-B2) + (A-B3) + (A-B4)
    = (A*4)-(B1+B2+B3+B4)

    i get a answer of 107 nm roughly. now that seems abit high to me. i was just wondering if someone could tell me where im going wrong. i know the equation is wrong. just i cant see any examples using nm instead of brake power.

    thank for your help guys :D
  2. jcsd
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