Turbine Generator: Difference between revisions

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[[Category:Steam Locomotive Parts]]
[[Category:Steam Locomotive Parts]]


[[File:MoselyTurboGenerator 1inch.jpg|thumb|center|300px|Mosley 1-inch scale turbo generator]]
== 1 inch scale ==
 
* [http://ibls.org/files/2019/DougAlkire/P7_Drawings/Pyle%20National%20MO-6%20generator/ Drawings for 1 inch scale Pyle National MO-6 Generator by Doug Alkire]
 
<gallery widths="300px" heights="300px" perrow="2">
File:MoselyTurboGenerator 1inch.jpg|[[Francis Moseley|Moseley]] 1-inch scale turbo generator
File:Moseley Generator MO-6 PyleNational 01.JPG
File:Moseley Generator MO-6 PyleNational 02.JPG
File:Moseley Generator MO-6 PyleNational 03.JPG
File:MosleyGeneratorTurbine2017.jpg|Moseley Generator showing the internal turbine blades.  Photo by Karl Kobel.
</gallery>
 
== 1.5 inch scale ==
 
<gallery widths="300px" heights="300px" perrow="2">
File:MosleyGenerator Postwarbob1.JPG|Turbo Generator(1.5 inch scale) by [[Francis Moseley]].
File:MosleyGenerator Postwarbob2.JPG
File:RidingRailkits MoseleyTurbin 1.jpg|Moseley 1.5 inch Turbine Generator manufactured by [[Riding Railkits Inc]]
File:RidingRailkits MoseleyTurbin 2.jpg
File:RidingRailkits MoseleyTurbin 3.jpg
File:RidingRailkits MoseleyTurbin 4.jpg
</gallery>


== Design Principles ==
== Design Principles ==
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[[File:RichEDean LocoLightingSchematic.gif|thumb|center|500px|Locomotive Lighting Schematic]]
[[File:RichEDean LocoLightingSchematic.gif|thumb|center|500px|Locomotive Lighting Schematic]]
== Pressure Regulator ==
[http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=75269&p=87552&hilit=moseley+regulator#p87552 Rich Carlstedt provided drawings for the Moseley pressure regulator]:
<gallery widths="300px" heights="300px">
File:Mosely steam regulator1-resized.jpg
File:Mosely steam regulator2-resized.jpg
File:Mosely steam regulator3-resized.jpg
File:Mosley generator regulators.jpg|Original Mosley turbo generator regulators.  Photo by David Sclavi
</gallery>
== References ==
* [[Otha Hege Steam Turbine Generator]]
* [[Francis Moseley]]
[https://www.chaski.org/homemachinist/viewtopic.php?f=8&t=32267&p=32977&hilit=turbine#p32804 Don Carr posted the following in <i>Chaski.org</i>, December 2003]:
: Here is a listing of construction articles and notes (both published and unpublished) on miniature working turbo-generators for live steam locomotives. I am going from the earliest material which I have to the more recent.
:: 1. [[The Miniature Locomotive]], September - October (part 1), November - December(part 2) 1952, "3/4 Inch Scale Steam Turbo-Generator" by R. E. Thompson. Refers to a design originally developed by [[Otha Hege]] of Lexington N.C.
:: 2. [[Model Engineer]], November 11, 1954 (part 1) and November 18, 1954 (part 2), "Miniature Steam Turbo-Generators" by E. Rowbottom (South Africa). This turbo-generator is for a 5 inch gauge locomotive.
:: 3. [[Model Engineer]], March 10, 1955, "A Miniature Turbo-Generator" by R. E. Thompson (U.S.A.) Basically, this is a technical summary of [[The Miniature Locomotive]] articles.
:: 4. A blueprint sized 18 inch by 30 inch dated July 21/71, DWG C-5005 drawn by WHD with note "Original design by O. Hege in 1951. Modified and clarified by WHD 1971". I am certain that this print is one that I purchased from [[Bill Dykeman|W. H. (Bill) Dykeman]] of York Central Railway, Prince Edward Island, Canada. A very clear, interesting and informative blueprint.
:: 5. [[Model Engineer]], 17 January 1986, "A Steam Turbo-generator" by Terry Timms. Designed for a 5 inch gauge Sweet Pea locomotive.
:: 6. Live Steam, "A Turbo Generator" by Richard Chiapparelli, September/October 1998 (part 1) and November/December 1998 (part 2). Originally for a 1 inch scale Atlantic but increased in size for a 1-1/2 inch scale locomotive.
:: 7. Unpublished notes taken in 1998 for a design and drawings (dated Feb 1983) by Ian Wynd of C.O.A.L.S ([[Central Ontario Association of Live Steamers]]) for a 3/4 inch modified and updated Hege/Thompson type turbo-generator. He made a number of these units and at one time some may have been sold through [[Miniature Power Products]] (Ted McJannett) but they are not available now. I have one photo showing the units disassembled and some of the tooling used in their construction.


== External Links ==
== External Links ==


* [http://www.ferroviefelettane.it/La_mia_Big_Boy/La_mia_Big_Boy.htm Photo of turbo generator for a Big Boy]
* [http://www.ferroviefelettane.it/La_mia_Big_Boy/La_mia_Big_Boy.htm Photo of turbo generator for a Big Boy]
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=75269&p=87552&hilit=moseley+regulator#p87552 Moseley Generator Regulator]
* "Steam Turbo Generator", Richard Chiapparelli, <i>[[Live Steam Magazine]]</i>, Part 1 September-October 1998, Part 2 November-December 1998
* [http://www.shapeways.com/product/MQXX8LCKA/1-5-quot-scale-live-steam-mosley-generator-1-8-scale?li=gmerchant&utm_source=google&utm_medium=cpc&gclid=CIP0nJ3C4ckCFYI_aQodn9EODA&optionId=18191145 "1.5" scale Live steam Mosley generator 1:8 scale", <i>Shapeways</i>]
* [http://www.chaski.org/homemachinist/viewtopic.php?f=30&t=103219 "LS Mfg MO-6 Turbogenerator Castings", <i>Chaski.org</i>]
** [http://www.chaski.org/homemachinist/viewtopic.php?f=30&t=103212 Another photo here]
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=32267&start=12 List of articles on Turbine Generators, <i>Chaski.org</i>]
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=75999 "For Those of You Into Working Turbogenerators", <i>Chaski.org</i>]
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=75283 "Moseley Generator", <i>Chaski.org</i>]
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=103792&start=12 "Pyle National Turbo generator MO-6", <i>Chaski.org</i>]
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=105108&sid=f37a883f1b5f5aca2d6ae60a4e0cd3fa "Steam turbine generator", <i>Chaski.org</i>]
* [http://www.handpieceheadquarters.com/our-brands-s/2320.htm?gclid=CKelw6X32NMCFUMcaQodxkgHdA "Handpiece Headquarters", source for dental instrument high-speed bearings]
* [http://icsarchive.org/asc/asc_steam_turbines_2_1917.pdf "Steam Turbines, Part II", PDF]

Latest revision as of 15:31, 12 January 2021


1 inch scale

1.5 inch scale

Design Principles

RichD wrote:

There are lots of ways to find an end to a problem, but don't overlook K.I.S.S. ! Think about the entire system and how it works, what is available for input and most of all, what you want out of it. I have built enough miniature "dynamos" to find that simple is as simple does.

  • 1.5" scale units must have small turbine wheels and the resulting need for high speeds.
  • A rotor built with speed in mind has no problem with 100K + RPM should it occur.
  • Steam issuing from a nozzle has a limited velocity and the blades will likely not attain 50% of that especially when driving a load. Always keep a load ON.
  • Control the steam feed with small pipe. 1/8" copper tube is plenty. Flow is controlled by the nozzle aperture. For best velocity use a venturi. Convergent-divergent tapers.
  • Don't forget the boiler operating range. Still having lights at 60 psi would be nice. So, having a wide range of output voltage followed by an electronic regulator is similar to the locomotive boiler. Reserve pressure is useful when needed.
  • Spinning magnets in a wound field makes an alternator (think automotive). Full wave rectify the output in the unit and ground the minus lead. Now one hot lead is all you need. Less mess. The loco chassis is ground (circuit return). Use Teflon #20 lamp leads.
  • A simple 3 terminal regulator chip (LM317 from Radio Shack) is adjustable and self limiting for over temp and current. It shuts down in case of a fault. Use as many as needed for different circuits/lamps. See the spec sheet for limitations (operating area).
  • Use low voltage lamps (large selection of 3V types - or LEDs) to avoid the need for large numbers of turns in the field thus allowing large dia wire to keep the internal resistance as low as possible. Resistance eats amps. #22 or 20 works well.
  • The schematic attached is as simple as it gets. Don't forget a heat sink.
  • The dyno can attain nearly 400° F in operation sitting on top of a boiler. Internal electronics have to be pretty tough to servive and work as well. Ventilation is a must.

By the way, the MO-6 Pyle National Dyno has 3 speed control systems built in. Centrifugal governor steam valve, over-speed brake and an eddy current drag disc for over-current. Can't fit all that in a miniature. Shaft rotates CCW. 3450 RPM. 32V. There are also 4 nozzles. Two primary and two secondary.

RichD toolman8(at)copper(dot)net

Locomotive Lighting Schematic

Pressure Regulator

Rich Carlstedt provided drawings for the Moseley pressure regulator:

References

Don Carr posted the following in Chaski.org, December 2003:

Here is a listing of construction articles and notes (both published and unpublished) on miniature working turbo-generators for live steam locomotives. I am going from the earliest material which I have to the more recent.
1. The Miniature Locomotive, September - October (part 1), November - December(part 2) 1952, "3/4 Inch Scale Steam Turbo-Generator" by R. E. Thompson. Refers to a design originally developed by Otha Hege of Lexington N.C.
2. Model Engineer, November 11, 1954 (part 1) and November 18, 1954 (part 2), "Miniature Steam Turbo-Generators" by E. Rowbottom (South Africa). This turbo-generator is for a 5 inch gauge locomotive.
3. Model Engineer, March 10, 1955, "A Miniature Turbo-Generator" by R. E. Thompson (U.S.A.) Basically, this is a technical summary of The Miniature Locomotive articles.
4. A blueprint sized 18 inch by 30 inch dated July 21/71, DWG C-5005 drawn by WHD with note "Original design by O. Hege in 1951. Modified and clarified by WHD 1971". I am certain that this print is one that I purchased from W. H. (Bill) Dykeman of York Central Railway, Prince Edward Island, Canada. A very clear, interesting and informative blueprint.
5. Model Engineer, 17 January 1986, "A Steam Turbo-generator" by Terry Timms. Designed for a 5 inch gauge Sweet Pea locomotive.
6. Live Steam, "A Turbo Generator" by Richard Chiapparelli, September/October 1998 (part 1) and November/December 1998 (part 2). Originally for a 1 inch scale Atlantic but increased in size for a 1-1/2 inch scale locomotive.
7. Unpublished notes taken in 1998 for a design and drawings (dated Feb 1983) by Ian Wynd of C.O.A.L.S (Central Ontario Association of Live Steamers) for a 3/4 inch modified and updated Hege/Thompson type turbo-generator. He made a number of these units and at one time some may have been sold through Miniature Power Products (Ted McJannett) but they are not available now. I have one photo showing the units disassembled and some of the tooling used in their construction.

External Links