What is the source of steam emitted next to the exhaust stack and numberboard in this photo?
A friend from school is curious, and now, so am I.
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| 765 Exhaust Steam near number board https://www.rypn.org/forums/viewtopic.php?f=1&t=30440 |
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| Author: | muldow70 [ Wed Nov 17, 2010 11:17 pm ] | ||
| Post subject: | 765 Exhaust Steam near number board | ||
What is the source of steam emitted next to the exhaust stack and numberboard in this photo? A friend from school is curious, and now, so am I.
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| Author: | muldow70 [ Wed Nov 17, 2010 11:51 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
Two different individuals have informed me it's exhaust from the air compressor. |
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| Author: | dinwitty [ Thu Nov 18, 2010 12:50 am ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
They must have added that, it used to exhaust thru the smoke stack thru the smokebox, perhaps the recent overhaul caused this. I wonder as the exhaust could cause a backlash in the smoke box and the fire heating and smoke. Probably a smart move. |
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| Author: | R. Hahn [ Thu Nov 18, 2010 8:10 am ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
I also appears they used some type of muffler arrangement. I have seen a few locomotives whose compressor exhaust does not go through the smokebox and it is quite loud. |
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| Author: | robertjohndavis [ Thu Nov 18, 2010 11:12 am ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
The device appears on NKP Berks from their in service days. Rob |
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| Author: | G. W. Laepple [ Thu Nov 18, 2010 12:25 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
Indeed. I remember the external air pump exhausts on 759 back in the day. It was often audible over the track noise when the engine was drifting at speeds under 30 mph. It was much louder and sharper (as I recall it) than the sound of an air pump exhausting into the smokebox. |
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| Author: | Frisco1522 [ Thu Nov 18, 2010 12:59 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
Speaking of 765, I'm curious as to why the numberboards have C&O style numerals in them instead of what I was used to seeing on NKP engines? |
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| Author: | nathansixchime [ Thu Nov 18, 2010 1:05 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
The numberboards in C&O style reflect the "as-built" condition of the 765. The Chesapeake and Ohio and Nickel Plate had common ownership until 1947. The NKP style numerals will return next year. |
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| Author: | John Risley [ Thu Nov 18, 2010 1:45 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
Big steam is not my personal favorite, kind of prefer smaller logging/mining or mid size locomotives. But I must admit this is one awesome locomotive, great picture. Sure would get my blood pressure going if I was standing next to it. Thanks, John. |
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| Author: | AlderGulch12 [ Thu Nov 18, 2010 2:06 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
The 30" 2-8-0 I worked on had it's exhaust routed internally, was originally an exterior with a muffler. Made it very tough to fire, every time the compressor hit it was like a birthday candle at a party. Not sure if that would effect a locomotive this large but there is a reason to design I've found. |
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| Author: | Les Beckman [ Thu Nov 18, 2010 2:22 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
nathansixchime wrote: The numberboards in C&O style reflect the "as-built" condition of the 765. The Chesapeake and Ohio and Nickel Plate had common ownership until 1947. The NKP style numerals will return next year. Kelly - And the Mars light too? Les |
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| Author: | dinwitty [ Thu Nov 18, 2010 11:28 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
Les Beckman wrote: nathansixchime wrote: The numberboards in C&O style reflect the "as-built" condition of the 765. The Chesapeake and Ohio and Nickel Plate had common ownership until 1947. The NKP style numerals will return next year. Kelly - And the Mars light too? Les The mars light was tested and restored worked over in its original restoration. It was a decision to give it the as built appearance. Just as a subthought I wonder if giving the engine a 767 look and celebration as this is the reason for 765's survival. |
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| Author: | sooline1003engr [ Sun Nov 21, 2010 6:01 pm ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
That is where the air compressors exhaust, and it goes through a muffler so it is not so loud. It makes a more pleasing muffled sound, Striaght air compressor exhaust is loud. |
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| Author: | j32885 [ Tue Nov 23, 2010 1:03 am ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
Here's my walk around video of NKP 765 all steamed up at Alma College during the SRI's fall Alma Special trip: Nickel Plate Road 765 (Steam Locomotive Tour), 10-23-2010 http://www.youtube.com/watch?v=xO7rBrfG8AY Enjoy! ^_^ You can see the 2nd steam exhaust working here. |
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| Author: | muldow70 [ Tue Nov 23, 2010 2:56 am ] |
| Post subject: | Re: 765 Exhaust Steam near number board |
Is there any specific reason why the air compressor exhaust would be vented in this fashion? From a engineering, operational, or maintenance point of view. I have found the air compressor exhaust to provide a convenient slight draft on my fire while a locomotive is still. However, if it's exhaust is not vented through the smokebox this air compressor induced draft should not exist. My initial guess is outside vent eliminates a pipe from the hot, particulated environment of a smokebox. |
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