Re: NNG - Oh Boy!! More Heisler Pics!!!

I just ran the numbers in the following formula:

BP x .75 X CS X (CB x CB ) x GR / DD

BP= boiler pressure
CS= piston stroke
CB= cylinder bore
GR= gear ratio
DD= driver diameter

like so:

200 X .75 X 16 X (18.25 X 18.25) x 2 / 40 = 39,967 lbs. TE

Which is optimistic but close to the 38,800 that is in Cass literature.

If you use the more standard boiler loss factor of .85 instead of .75, the TE goes to 45,297, still less than the claimed 49k+.

Smoke and Mirrors...

If a 90 ton Heisler had 2.18:1 gearing and used 85% mean boiler pressure, you'd get 49,410 lbs TE.



Edited 2 time(s). Last edit at 04/18/2015 05:26PM by Earl.