A steam engine 18° x 24" runs at 250 rpm.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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STEAM ENGINE PROBLEM.  Please solve carefully/ellaborately and include the untis in every step, show diagram and write your solutions clearly and must be readable if your solution is in written form. Your work will be appreaciated much. Thank You.

A steam engine 18" x 24" runs at 250 rpm. The diameter of piston rod is 3.5 in. The indicator card
is 3.5 in long and the area of the head end is 1.96 sq. in. Area of the crank end card is 1.86 sq. in.
Spring scale is 800 lb. In the test, a prony brake with 10 ft lever arm registered an average load on
the scale of 100 psi/in. What is the mechanical efficiency of the engine?
Transcribed Image Text:A steam engine 18" x 24" runs at 250 rpm. The diameter of piston rod is 3.5 in. The indicator card is 3.5 in long and the area of the head end is 1.96 sq. in. Area of the crank end card is 1.86 sq. in. Spring scale is 800 lb. In the test, a prony brake with 10 ft lever arm registered an average load on the scale of 100 psi/in. What is the mechanical efficiency of the engine?
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