# Homework Help: Morse test

1. Jan 22, 2010

### donniemateno

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

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