Hi Folks,
recently I downloaded some steam engines and testrun them on my 'lab-layout'. It turned out, they were much too powerful compared to the real life ones. Here is an extract of one engine spec:
firebox-volume 1600
firebox-to-boiler-heat-flow 0.055
firebox-efficiency 0.9
boiler-volume 13800
maximum-volume 9600
minimum-volume 5600
water-injector-rate 5.7
westinghouse-volume 80
main-reservoir-volume 50
piston-volume-min 10
piston-volume-max 228.207
piston-area 0.3117
piston-angular-offsets 0.0174,1.5254,3.0333,4.5413
boiler-to-piston-flow 0.0045
piston-to-atmosphere-flow 0.003
safety-valve-low-pressure 1720
safety-valve-low-flow 0.0005
safety-valve-high-pressure 1730
safety-valve-high-flow 0.01
max-fire-coal-mass 80
max-fire-temperature 1450
shovel-coal-mass 1.5
burn-rate 0.001
fuel-energy 25000
initial-boiler-temperature 450
firebox-to-boiler-heat-flow-idle 0.003
burn-rate-idle 0.003
It went uphill a 2 percent grade (20%o) with a consist of 900 tons at 38 kph, whereas the datasheet of the real one only gives 270 tons for that grade an speed. (Not really the BigBoy, isn't it ?)
So I would like to tweak it to more lifelike data. All the data above are detailed in CCG, some however withou any useful unit.
Does anybody have some knowledge which physical units are applied, especially for
firebox-to-boiler-heat-flow - unit ? Megawatts ?
piston-to-atmospheric-flow - dia or area ?
safetyvalve-low-flow - same (not that important)
savetyvalve-high-flow - same (not that important)
burn rate - unit ? kilograms per second ?
boiler-to-piston-flow - unit ?
BTW: What is the Westinghouse volume ??
Would be happy to get some idea.
Norbert
recently I downloaded some steam engines and testrun them on my 'lab-layout'. It turned out, they were much too powerful compared to the real life ones. Here is an extract of one engine spec:
firebox-volume 1600
firebox-to-boiler-heat-flow 0.055
firebox-efficiency 0.9
boiler-volume 13800
maximum-volume 9600
minimum-volume 5600
water-injector-rate 5.7
westinghouse-volume 80
main-reservoir-volume 50
piston-volume-min 10
piston-volume-max 228.207
piston-area 0.3117
piston-angular-offsets 0.0174,1.5254,3.0333,4.5413
boiler-to-piston-flow 0.0045
piston-to-atmosphere-flow 0.003
safety-valve-low-pressure 1720
safety-valve-low-flow 0.0005
safety-valve-high-pressure 1730
safety-valve-high-flow 0.01
max-fire-coal-mass 80
max-fire-temperature 1450
shovel-coal-mass 1.5
burn-rate 0.001
fuel-energy 25000
initial-boiler-temperature 450
firebox-to-boiler-heat-flow-idle 0.003
burn-rate-idle 0.003
It went uphill a 2 percent grade (20%o) with a consist of 900 tons at 38 kph, whereas the datasheet of the real one only gives 270 tons for that grade an speed. (Not really the BigBoy, isn't it ?)
So I would like to tweak it to more lifelike data. All the data above are detailed in CCG, some however withou any useful unit.
Does anybody have some knowledge which physical units are applied, especially for
firebox-to-boiler-heat-flow - unit ? Megawatts ?
piston-to-atmospheric-flow - dia or area ?
safetyvalve-low-flow - same (not that important)
savetyvalve-high-flow - same (not that important)
burn rate - unit ? kilograms per second ?
boiler-to-piston-flow - unit ?
BTW: What is the Westinghouse volume ??
Would be happy to get some idea.
Norbert