Spawn_of_Chaos97
Trainz for Everyone!
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Modern Steam
- Thread starter magickmaker
- Start date
AndreaLuigi
New member
What happens? Somebody places an Italian training CD in a (train)magazine??? :hehe:
E' stato un piacere!
E' stato un piacere!
magickmaker
New member
Thought I'd bring some here. Just some neat bits of messages I'm getting from the designers of the 5AT.
The performance model needs to take into account the very high steam production that is anticipated from its relatively small boiler, the very large steam chests and very large valve openings that will ensure efficient steam flow into (and out of) the cylinders, and the Lempor exhaust system that will create a very low back pressure in the cylinders, in order to take some account of the technical advances that the 5AT will demonstrate.
a 2100 kPa (305 psi) boiler pressure and 450oC (840oF) steam temperature
As you say, the model is starting to look pretty good. In case it is of any use, after sending you the drawing yesterday I noticed that the exhaust steam pipes connecting to the feedwater heaters didn?t quite conform to Wardale?s sketches, so I have modified them in the attached drawing update. What I?ve drawn is still not precisely correct because I don?t know precisely how these pipes and their insulation will actually look in the end. In addition, I don?t have time to draw out their intersections with the boiler and feedwater heater casings accurately, so I?ve guessed what they might look like. They are not very elegant appendages to the locomotive but they are necessary. Anyway, I?ll leave it up to your modeller to do as he sees fit with them.
(the note being here, that they may do what barn does
)
There are two parallel valves per cylinder, each with its own piston valve driven off the Walschaerts valve gear by means of a ?double hanger? that supports the ends of the two valve rods. I can send more info if it is needed.
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Pattaya estate agents
The performance model needs to take into account the very high steam production that is anticipated from its relatively small boiler, the very large steam chests and very large valve openings that will ensure efficient steam flow into (and out of) the cylinders, and the Lempor exhaust system that will create a very low back pressure in the cylinders, in order to take some account of the technical advances that the 5AT will demonstrate.
a 2100 kPa (305 psi) boiler pressure and 450oC (840oF) steam temperature
As you say, the model is starting to look pretty good. In case it is of any use, after sending you the drawing yesterday I noticed that the exhaust steam pipes connecting to the feedwater heaters didn?t quite conform to Wardale?s sketches, so I have modified them in the attached drawing update. What I?ve drawn is still not precisely correct because I don?t know precisely how these pipes and their insulation will actually look in the end. In addition, I don?t have time to draw out their intersections with the boiler and feedwater heater casings accurately, so I?ve guessed what they might look like. They are not very elegant appendages to the locomotive but they are necessary. Anyway, I?ll leave it up to your modeller to do as he sees fit with them.
(the note being here, that they may do what barn does
)There are two parallel valves per cylinder, each with its own piston valve driven off the Walschaerts valve gear by means of a ?double hanger? that supports the ends of the two valve rods. I can send more info if it is needed.
________
Pattaya estate agents
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I think they're posted on the 5AT site. There's a number of preliminary design calcs in pdf files - I pretty sure I remember 1 covering the connecting rod.
I hope they are successful but even with all the projected and hoped for improvements (and going from an overall fuel efficiency of 8-9% up to 20+ is a significant improvement) it still won't compete with a diesel of the same capability if they're burning diesel fuel in the firebox. Burning coal however at those efficiences would make them economically competitive due to the difference in fuel cost - at least here in the states. Using a firebox based on Porta's gas producer combustion system might even make it environmentally friendly enough to be a viable alternative.
Bob Pearson
No this is not correct. The exhaust system uses blast nozzels to direct the steam out the stacks - 2 or 3 I think at last count. This is the standard way to draft the fire. The condensate returned to the tender - I think you confused this with an exhaust steam condensing system - is only from the feedwater heaters. The heat remaining in the return condensate from the feedwater heaters will be used to raise the temperature of the water in the tender.
Bob Pearson
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magickmaker
New member
I probably did, I've been looking at the plans that I got sent (which were in turn sent to barn). They're very detailed, even have how the firetubes are placed and everything you'd need to make a perfect model of the loco. Right now, I'm waiting on the special "Double Hanger" diagram.
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SensualKeri live
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SensualKeri live
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Not to take the thread off topic but dynamic brakes are an interesting concept and have now been incorporated into automobile technology. Actually dynamic brakes create derivative power in addition to slowing a loco or auto. In fact some may think the power generated is more valuable than the drag created. This is mostly true for diesel electric locomotive power and hybrid autos but could also be used to charge batteries on a properly equipped steam loco.
Cheers
AJ
Cheers
AJ
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