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Great history lesson about this locomotive

Just "Wow" • Great review and history lesson. The history lesson on this locomotive, is what you do best in your vids. This engine would not make it on my curves, but still fun to watch. Ash pan light, cool Lionel feature. Cool ending, with the edit out.
Cheers from Michigan

Eric, very well made video. Although I know very little about what this nice engine should sound like, or whether the Whistle is authentic, it's Fantastic. My Railroad is named "Leapin Larry's Looney Lines RR", and thats why, It does not matter about the Actual Real Thing, it's just Plain Fun...Thank You For taking the time to share this new fun to run engine with us....ITS A WOW!

Finally - the chuffing is -correct- for a Compound (a multi-cylinder Compound should

sound like a 2-cylinder Simple, and this one does). I have the earlier ATSF

RS5(?) incorrectly "syncopated" exhaust version. Not bad enough to trade "up"

for, though.

 

Unfortunately, I believe (not sure) Lionel has started using this exhaust sound-set

on the Challengers, which, being Simples and not Compounds, SHOULD have a syncopated exhaust. At any kind of speed, though, it wasn't discernible, even in the real world. 

 

Sounds wonderful; 4 chuffs, it seems, also. The whistle sounds a good as any N&W

"hooter" ever does, which is not very.

 

Nice review, as usual; nice piece; makes me appreciate my paid-for earlier version, though.

Last edited by D500
Originally Posted by D500:

Finally - the chuffing is -correct- for a Compound (a multi-cylinder Compound should

sound like a 2-cylinder Simple, and this one does).

I disagree. An N&W Y class Compound should start in simple, i.e. 8 chuffs per revolution (more like very loud hissing of steam), then change to compound with only 4-chuffs per revolution of the FRONT engine (with the large low pressure cylinders). Any, and EVERY compound MUST have high pressure steam introduced to its low pressure cylinders, otherwise the poor locomotive would not be able to start a train.

Originally Posted by Hot Water:
Originally Posted by D500:

Finally - the chuffing is -correct- for a Compound (a multi-cylinder Compound should

sound like a 2-cylinder Simple, and this one does).

I disagree. An N&W Y class Compound should start in simple, i.e. 8 chuffs per revolution (more like very loud hissing of steam), then change to compound with only 4-chuffs per revolution of the FRONT engine (with the large low pressure cylinders). 

I disagree with this.

quote:
Any, and EVERY compound MUST have high pressure steam introduced to its low pressure cylinders, otherwise the poor locomotive would not be able to start a train.

While this part is true, the ALCO system provided for the Y3 to start in compound. The reason being is that in starting in compound, the HP steam was routed to the HP cylinder saddle. There it was split up passing the HP steam: 1.) through a reducing valve (inside of the saddle) to the LP cylinders and 2.) to the HP cylinders. 

 

At this time, live steam was going to the LP & HP cylinders to start the train. An intercepting valve (inside of the saddle) separated the compartment that carried the live steam to the LP cylinders and the compartment that supplied the exhaust from the HP cylinders (later to be sent to the LP cylinders). This valve was kept closed by the pressure of the steam going to the LP cylinders ( there being no exhaust yet from the HP side).

 

The exhaust from the HP cylinders was trapped inside of the saddle and could not exhaust to atmosphere because the "Simpling Valve" was in the "Compound" position. This meant that, as the loco started and the HP cylinders exhausted, pressure built up inside the compartment on the other side of the intercepting valve. After a revolution or two, the pressure in this compartment working on the opposite side of the steam going to the LP cylinders overcame the pressure on the other side and opened the intercepting valve. This 1.) allowed the exhaust from the HP cylinders to feed the LP cylinders and 2.) closed off the steam coming through the reducing valve.

 

The end result was only four exhausts per revolution when starting in compound.

 

This system was the same on the Z class 2-6-6-2 and other Y classes up through the Y6b. Later on, things changed for the Y5-Y6b's when the N&W developed the external reducing valve/booster system.

Last edited by Big Jim

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