2016 Boiler Rebuild for the SP&S 700

Rebuild Home Project Overview Superheater Sponsorship Drive

Superheater Pipe Sponsorship Fundraiser

The superheaters on the SP&S 700 are old, worn out by the caustic environment and the constant temperature swings within the flue tubes, and they need to be replaced. You can help keep the "First Lady of the Northwest" in service for many years to come by sponsoring one or more of her new superheaters. All donations will be used for the inspection and rebuild of the SP&S 700, and as always all donations are 100% tax deductible.

Instructions:

1. Select the superheater number(s) you'd like to sponsor by looking at the tube sheet diagram at left and checking the list of sponsors below to find available units.
2. To pay online with a credit card, debit card, or PayPal account, first click the big red button below, which opens up PayPal on a new tab.
   Next enter the amount you'd like to donate: $275 for your first superheater, or $200 for each subsequent one (including if your first was in any prior order). Now log in to PayPal (or near where it says "Don't have a PayPal account?" on the lower right click the "Continue" link and enter all your information). Then on the review your donation screen, find the text that says "Unit# and Name to Display on Website," click it, and in the box that appears enter the superheater number(s) you'd like to sponsor and the name(s) you'd like to have appear in the donor list below .
3. You can also save us PayPal's 2.2% service charges by sending in a check. Just print out this form, fill it out, and mail it in along with your check. It may be old school technology, but like the 700, it works better than some of the new ways!

Superheater Sponsors
Chris B McLarney George and Leia Landrock Bob McCoy John Meyer Jim and Alyce Abney Angelo Figone Kerrigan and Kyrian Gray Daniel & Cynthia Sandor Jim Betz Scott Thompson Bruce Sherman Robert Ferguson Bruce Sherman Daniel Quiat Bruce Sherman Daniel Quiat John M. Fujii Harry Hendricks Daniel Quiat Ethan Morel Daniel Quiat Rennsport Systems Al Baker Al Baker Al Baker Al Baker Felix J and Glenda McLarney Daniel Quiat Abby & Bella Monical --Reserved-- Judson Parsons Terry Thompson Ethan Morel Robert McLaughlin Drummac, Inc. for Shelly Marum, 2017 Chris McLarney Memorial Award Winner Mark Siegel and Patricia Casey David Specht Richard Jenkins John & Michelle Tenerowicz Judson Parsons Stephen Dudley Marjorie A. Helander John M. Harper Family Ken Vannice Leroy H. Hemmingway Jerry Davis H.L. Martin In memory of Alyce Abney Robert McLaughlin Henry Specht In memory - Engineer Rudy Wachter In memory - Engineer Rudy Wachter Harold Borovec Margaret Dunham Margaret Dunham Margaret Dunham Alex Jones, 2019 winner of the Drummac Chris McLarney Memorial Award Paul L. Baldassare Family Henry Specht Robert McCoy In memory - Steve Borstad Robert Ferguson	Larry & Verona Jacobson Stephen Dudley Nicholas & Tina Gerba Kingman Railroad Museum Kingman Railroad Museum In Memory of Donna Okimoto Michael Day Randal O'Toole Drummac, Inc. for Noah Taylor Robert Vanderbeck Arthur Burkhalter Art & Pam Burkhalter Jon Sirrine Terry and Patsy Kimzey James J. Felts Robert McLaughlin William Eppick In memory of Earnestine Scarbrough Charles Harrison Kelly McLarney Charles Harrison Miles and Desiree McLarney Charles Harrison Felix B. and Dorothy McLarney In memory of Jason Abney Pat and Kay McLarney Harlan and Melia Hoult Maureen and Molly McLarney Tom Gregg Susan Boos Arnie Holden In Memory of Debra Sedaker Barry and Carol Robertson Barry and Carol Robertson Barry and Carol Robertson Barry and Carol Robertson Barry and Carol Robertson Steve Sedaker honoring Anushka and Jeremy Klitzke Marlin Diehl In memory of Earnestine Scarbrough In memory of Earnestine Scarbrough Steve and Mona Sedaker Greg Kamholz Steve and Mona Sedaker Jeff & Vicky Honeyman In memory of Harry E. Durkee - PRR Robert McLaughlin available available Arnie Holden Arnie Holden available Mark Siegel and Patricia Casey Evan Lazer Evan Lazer Evan Lazer available available available available available In memory of Earnestine Scarbrough	available Linda Vanderbeck Jim and Linda Vanderbeck Jeremy Klitzke & Anushka Shenoy Jeremy Klitzke & Anushka Shenoy available available available available available available available Mike and Jan Senchyna available available Mark Siegel available Mark Seigel and Patricia Casey available available available In memory of Earnestine Scarbrough available Bill Hamby Bill Hamby available Willow Creek Railroad Museum Mark Siegel and Patricia Casey Garry Johnson Mark Siegel and Patricia Casey Garry Johnson Mark Siegel and Patricia Casey Garry Johnson Mark Siegel and Patricia Casey Garry Johnson Barry & Carol Robertson Barry & Carol Robertson Barry & Carol Robertson Barry & Carol Robertson Barry & Carol Robertson Mark Siegel and Patricia Casey Mark Siegel and Patricia Casey Mark Siegel and Patricia Casey Mark Siegel and Patricia Casey Steven Kasper Roger and Jeannie Woehl Jeremy Klitzke & Anushka Shenoy Jeremy Klitzke Jeremy Klitzke & Anushka Shenoy Don Matlock Jeremy Klitzke & Anushka Shenoy Jeremy Klitzke & Anushka Shenoy Jeremy Klitzke & Anushka Shenoy Jay Simpkins Nate Rosenblad In memory of Bill Williams Haskell Simpkins Rich Goodman Jeremy Klitzke & Anushka Shenoy Beau Bassett Mark Siegel and Patricia Casey Doug Bassett

What is a superheater?

The boiler of the SP&S 700 has 186 flue tubes of 3.75" diameter and 54 more of 2.00" diameter. These 21' tubes carry the hot exhaust fumes from the firebox to the smokebox. Nestled within each of the larger tubes is another pair of pipes connected at the firebox end by a "U"-shaped return casting. This inner assembly is called a superheater. Within the smokebox, one of the pipes from each superheater is joined in a manifold called the superheater header while the other pipe leads to a similar manifold at the throttle box.

What does a superheater do?

The short answer is that superheaters convert "wet" steam into "dry" steam. For a better understanding, let's follow the steam in an operating engine. We've already mentioned that the flue tubes channel the hot exhaust fumes from the firebox to the smokebox. As they do so, they transfer heat from fumes to the boiler water. As the water gets hotter and hotter, it eventually boils, creating "wet" steam and raising the pressure. Now when the engineer opens the throttle, this wet steam leaves the boiler, travels down the dry pipe, and enters the superheater header in the smokebox. The path of the steam there divides, leading through the 186 individual superheaters. While passing through the superheaters, the wet steam's temperature is raised several hundred degrees and it becomes known as "dry" steam because it is no longer on the verge of condensing into water. The dry steam next exits the superheater, passes through the throttle body and enters the steam chests and cylinders, where it provides the motive force of the locomotive. Dry steam is superior to wet steam for powering the locomotive because it provides higher thermal efficiency and is less likely to condense within the piping and cylinders.