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Re: Calculating Tractive Effort for steam locomotives
Posted: 12 Apr 2009 03:53
by ostlandr
Thanks! Brain was not working late at night.
DaleStan wrote:ostlandr wrote:BUT there is a 4:1 gear reduction between the engine and the drivers.
If my recollection of physics is accurate:
Ignore that. Run the calculations without the gear reduction.
Then divide the speed by 4 and multiply the force (TE) by 4. Power remains unchanged.
Re: Calculating Tractive Effort for steam locomotives
Posted: 24 May 2009 06:09
by PikkaBird
ostlandr wrote:HP cylinder area is 0.2025 sq meters (x6)
LP cylinder area is 0.09 sq meters (x6)
Silly question perhaps, but aren't low-pressure cylinders generally
larger than high-pressure?
Re: Calculating Tractive Effort for steam locomotives
Posted: 30 May 2009 01:04
by ostlandr
D'oh!
Reverse that. . .
I eventually figured it out. At the scale I was using for the engine, the horsepower wasn't high enough for a locomotive. Might work to power a steam road vehicle, though.
Interesting design concept, though. Only four moving parts, not counting the valves.
PikkaBird wrote:ostlandr wrote:HP cylinder area is 0.2025 sq meters (x6)
LP cylinder area is 0.09 sq meters (x6)
Silly question perhaps, but aren't low-pressure cylinders generally
larger than high-pressure?