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Steam & Excursion > Frisco Hotshot in 1940Date: 04/03/24 16:16 Frisco Hotshot in 1940 Author: Frisco1522 Frisco appears to be getting its money's worth out of 4-8-2 #1525, hooked up and heading a hotshot freight with refrigerator cars on the head end and hitting track speed in this gorgeous Wm. Barham photo taken in Neosho, MO in 1940. Pickin 'em up and layin 'em down. Looks like Bill wheedled them into making some smoke as this is a bit heavy for normal service. Makes a great photo.
The 1522s were a true dual service locomotive which was used in all areas. Too bad older photos don't come with sound as I'm sure this one would be fantastic. Date: 04/03/24 16:21 Re: Frisco Hotshot in 1940 Author: refarkas Excellent historic action shot.
Bob Date: 04/03/24 16:22 Re: Frisco Hotshot in 1940 Author: jgilmore Terrific steam photo, thanks for posting...
JG Date: 04/03/24 16:28 Re: Frisco Hotshot in 1940 Author: srfreer Frisco1522 Wrote:
------------------------------------------------------- >Too bad older photos don't come with sound as I'm sure this one would be fantastic. Insert 1522 audio here...can't you hear it? I know you can! My photo published in Railfan & Railroad Magazine of #1522 pulling freight from Chattanooga to Birmingham in 1994 comes to mind! Date: 04/03/24 16:41 Re: Frisco Hotshot in 1940 Author: train1275 What is not to like ?!!!!
Wow !! Date: 04/03/24 17:10 Re: Frisco Hotshot in 1940 Author: wcamp1472 Superheated screamer!
What you can't see is the power of superheated steam. --- which powers the pistons all the way down their strokes.... As the author notes: her admission period is under 20% of the stroke, yet the heat in the steam powers the pistons all the way to the opening of the exhaust-rings! The stack tells us that the fire is very hot and flames burning into flues and tubes ---- extending the flame temps further over the 'hot' ends of the superheater units! Also, the short cut-off of the valve gear tells us that the steam is being slowed in its flow through the superheater units ---- The longer steam stays in the units --- the hotter it gets! Short cutoffs lengthen the 'dwell-time' of the steam inside the superheater units and that means hotter steam, using less fuel! "Hotter" means that the H2O molecules, in the gaseous state of 'steam', are forced further and further apart .... Boiler pressure remains the same, but WAY less weight of steam is powering the pistons... Fewer molecules of steam, per stoke, means lower water consumption, and less fuel is needed! Its hard to imagine the intensity of the flames and the ferocity of the fire in the firebox. Yes, the smoke is DARK, BUT all the fuel has been fully burned --- there's not a wasted bit of the carbon fuel --- oil or coal. The stack tells me that flame-tips are burning well down insde the flues and tubes.. raising the superheat temperatures !! To get THAT HOT, means that only a small amount of steam fully powers the pistons. The fierce wind through the firebox, exceeds 100 mph! Fuel-feeding rate is very low, and flame tips are easily over 3,000 F! It's a true, white-hot firestorm in the firebox !! It takes about 10 to 12 minutes to heat-up the firebox & brick-work ( reaching a state of incandescence) before all that excitement gets to the state that is captured in this Magnificent Photo !!! BRAVO! W. ( The noise and the pounding earth must have been incredible, as she thunders by!) Edited 4 time(s). Last edit at 04/03/24 17:27 by wcamp1472. Date: 04/03/24 17:57 Re: Frisco Hotshot in 1940 Author: hawkinsun How can a steam locomotive look beautiful ? Well, it sure is, when it's doing what it was designed for, and the Frisco's looked nicer than many. Thanks for sharing that photo.
Craig Hanson Vay, Idaho Date: 04/03/24 20:15 Re: Frisco Hotshot in 1940 Author: 1003-2719-1385-engr Wes, What I find neat is that the smoke at the stack in split in the middle (left vs. right), between a haze and dark.
Date: 04/04/24 06:03 Re: Frisco Hotshot in 1940 Author: wcamp1472 What it looks like to me, is the dark portion seems to be a high velocity
central exhaust-jet, surrounded by a column of lower velocity eddy-currents making the lighter colored smoke, surrounding the central jet.... The uniformity of the high velocity, central jet verifies the accuracy of the design of the single-port exhaust nozzle. Later, designs ( like with UP 3900s, 4000s & 800s) are that they used 4 jets per 'stack, and two stacks...together with intermediate combining-concentrators which resulted in many jet-columns, together withincreasing the impingement concentraing plates for stronger drafts, especially when the engine is 'hooked-up' ( shortened admisson periods)*. RRs using the more common single jet, you have relatively small impingement-surface areas of the one exhaust-column. Many RRs tried cross-bars, or small separate "fingers", on the top of the exhaust ( blast) nozzle--- trying to increase surface areas, wirh little success. W. (* A distinct disadvantage with "radial" valve gears [Walschaert and Baker, for example], is that as you reduce the port-opening width [ hooking-up] you also reduce the opening for the exhausted steam. That reduced exhaust-port opening results in serious pressure on the exhaust-face of the pistons. That internal back-pressure in the cylinders acts against the positive steam pressure trying to power the drivers). Date: 04/04/24 09:20 Re: Frisco Hotshot in 1940 Author: GN599 What a fine machine!
Edited 1 time(s). Last edit at 04/04/24 09:20 by GN599. Date: 04/04/24 09:22 Re: Frisco Hotshot in 1940 Author: Ritzville Excellent and enjoyable steam photo!!
Larry Date: 04/06/24 10:32 Re: Frisco Hotshot in 1940 Author: MILW16 Marvelous photo and great discussion. Thanks for posting it (as with all you photos).
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