What Engine Is This

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SZuiderveen
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Re: What Engine Is This

Post by SZuiderveen » Fri Feb 08, 2019 11:29 am

They also don’t drip down you neck while shooting rods. Also, no stress on the pressure vessel by having the bracket riveted directly to boiler. Also cleaner air to air filter.

Steve

Pontiacguy1
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Re: What Engine Is This

Post by Pontiacguy1 » Fri Feb 08, 2019 2:45 pm

longer trains= more air required for brakes, which means bigger pumps to keep the air pressure up. I just figured the pumps were getting large enough that they wouldn't fit in/around/under the running boards any more, and thus they moved them up front. Also, putting them on the smokebox front of an articulated would have simplified the piping, as it could be hard-piped since it wouldn't have to swivel with the front engine when going through curves.

Kimball McGinley
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Re: What Engine Is This

Post by Kimball McGinley » Fri Feb 08, 2019 5:34 pm

Maybe if they were dropped down onto the pilot, the length increase was a problem?

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JBodenmann
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Re: What Engine Is This

Post by JBodenmann » Fri Feb 08, 2019 7:37 pm

Hello My Friends
Fender brings up good point. I think the reason for mounting them on the smoke box versus the pilot is that this is an articulated engine. The pilot wiggles all over the place. To run steam and air lines to the pumps from the boiler and to the pilot would involve a lot of flexible piping.
Jack

KenG
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Re: What Engine Is This

Post by KenG » Fri Feb 08, 2019 9:29 pm

2584.JPG
Seems like the Great Northern mounted air pumps at the front of many of its locomotives. Here is S2 number 2584 in Havre Montana.

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NP317
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Re: What Engine Is This

Post by NP317 » Fri Feb 08, 2019 10:45 pm

Articulated locomotives with air pumps on the smokebox front did not require flexible steam and air line due to a moving front engine.
~RN

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dwilloughby
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Re: What Engine Is This

Post by dwilloughby » Fri Feb 08, 2019 10:48 pm

Off subject, but a nice Christmas Card from Leanin' Tree, by Howard Fogg?

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Fender
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Re: What Engine Is This

Post by Fender » Sat Feb 09, 2019 7:03 am

JBodenmann wrote:
Fri Feb 08, 2019 7:37 pm
Hello My Friends
Fender brings up good point. I think the reason for mounting them on the smoke box versus the pilot is that this is an articulated engine. The pilot wiggles all over the place. To run steam and air lines to the pumps from the boiler and to the pilot would involve a lot of flexible piping.
Jack
Actually, that was Pontiacguy’s point, not mine. But I agree, the piping is much simpler on articulated locos, if the pumps are on the smokebox. I hadn’t thought of that.
Dan Watson

Mike Walsh
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Re: What Engine Is This

Post by Mike Walsh » Sat Feb 09, 2019 7:35 am

It's entirely plausible that the air pumps were on the smokebox due to clearance issues... Tunnels, bridges, etc... Just a thought.

fullheadasteam
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Re: What Engine Is This

Post by fullheadasteam » Sun Feb 17, 2019 1:47 am

Is the engine not a C&O H7 simple simon.

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