Changes to the Site: 1. Added PHOTOS and information for Dake steam engine under PHOTOS III - DAKE page, 10-04-09. 2. Added additional Bob's original vellum drawings, and re-sized vellum drawings on PHOTOS I page, 10-16-09. 3. Added Williston Engine show photos under PHOTOS II, 10-17-09. 4. Reorganized website, 10-26-09. 5. Added ENGRAVINGS III, 11-18-09. 6. Added MAGAZINE tab for new "STEAM ENGINE TECHNOLOGY" magazine, Jan.2010-1st Edition, 12-08-09. 7. Created separate BOOKS tab, 12-17-09. 8. Enlarged DESIGN DIAGRAMS and added Doug Leeming notes at DESIGN/CONSTRUCTION tab, 12-18-09. 9. Added 3D MODELING (Page 01) tab, 12-19-09.
10. Added ENGRAVINGS-04 and 05, 01-02-10. 11. Added ENGRAVINGS-06 and 07, 01-03-10. 12. Added ENGRAVINGS-08, 01-07-10.
13. Added 3D MODELING (Page 02) tab with preliminary 3D images, 02-08-10.
(A non-commercial site for the advancement of Steam Engine knowledge.) (Welcome Steam Fans !) ------------------------------------------------------------ Bob Jorgensen's Original Steam Engine Photos, Workshop Photos, and Steam Engine Design Drawings
Photos I (see Photos II & III tabs for additional pictures)
Bob Jorgensen's Engine List
It is unknow exactly how many steam engines Bob Jorgensen constructed, however, here is a list of Bob's known engines:
(Click on any photo to enlarge it. Right-click "save picture as" to save photos or drawings-for personal non-commercial educational use only.)
Hot Air Engines:
1. Vertical, inverted, 1-cylinder. This engine was featured in "The Stirling Engine Manual", p. 63, by James Rizzo.
2. Single cylinder with fan blade. This engine was featured in "Hot-Air Engines - Vol. 2", p.83, Lindsay Publications, Inc.
3. Single cylinder vertical with round-spoked flywheel, Ericsson type. This engine was probably built from two articles, "Steam and Stirling Engines You Can Build", p.64, and "The Stirling Engine Manual", p.123.
Steam Engines:
-1. Vertical twin-cylinder. This engine is detailed with drawings in the book"Model Making", Raymond Francis Yates, 1925, reprinted by Lindsay Publications, Inc.
2. Vertical inverted twin cylinder, "Bernay-1st copy". This engine was featured in a print from Lindsay Publications, Inc., and was modeled by Bob Jorgensen in the spring of 2005. Bob described his work to determine the correct geometry for the valve gear for this engine as one of his most challenging model undertakings.
Bob used a 6 1/8" long cylinder block for his model, which was somewhat of a random choice, but probably more of a practical result since many of Bob's designs centered around the 2"x3" gray cast iron bar stock that seemed to become one of Bob's favorite sized building blocks for his engines. This bar stock can also be obtained in 2"x5" and 2"x6" sizes, with the front portion used for either a separate or built-in steam chest. The nominal outside dimensions of gray cast iron bar stock is generally oversized slightly to allow final machined dimensions of exactly 2"x3" (when using a 2"x3" bar).
A photo of Bob's pencil drawings for the Bernay are shown in photos here.
3. V-twin, "Davis Direct Connect". This engine does not use the traditional crossheads. This engine is featured in the public domain book "Modern Steam Engines: The Construction of Modern Steam Engines" by Rose, Joshua, M.E., Henry Carey Baird & Co., 1893.
A photo of Bob's pencil drawing for the "Davis" engine is shown here.
4. Semi-rotary, "Robertson's", twin square pistons in horseshoe shape. This engine is featured in the public domain book "Modern Steam Engines: The Construction of Modern Steam Engines" by Rose, Joshua, M.E., Henry Carey Baird & Co., 1893.
A photo of Bob's pencil drawing for the "Robertson" model engine is shown here.
-4a. (2nd copy of "Robertson's Semi-Rotary") (Note the first copy of Engine No.4 has a flywheel with spokes, and the second copy of Engine No.4 has a solid flywheel.)
5. The Dake engine, which has twin pistons shaped like slices of bread, which move in a linear and also a rotary fashion, Rotary "Dake" engine with square piston. (Note: An entire page of photos and video links has been added for the Dake engine. See the PHOTOS III - DAKE tab on this website.)
12. Horizontal single-cylinder engine with single flywheel, extra long-stroke mill type engine, wood insets in connecting rod, steam chest above and unattached to cylinder. This engine was featured in artlcle from Lindsay Publications, Inc., publication "American Machinist Magazine", March 24, 1906.
A photo of Bob's pencil drawing for this model is shown here.
-13. Vertical single-cylinder engine, single flywheel, with one rectangular and one round support column, wishbone connecting rod. (Similar to a Stuart type design)
14. Vertical large single-cylinder engine, 4-column support, single flywheel, with twin eccentrics and reversing gear. This engine is similar to engine shown on page 147 of "Model Making", Raymond Francis Yates, 1925, reprinted by Lindsay Publications, Inc.
Preliminary CADD drawings for Bob's No.14 steam engine.
-17. Oscillator, vertical, single-cylinder, small, with single flywheel. Photo shows the proud new owner (young man on the left) of Engine No.17, a gift from Bob.
18. Oscillator, vertical, single-cylinder, with single flywheel and 4-column support.
-19. Oscillator, horizontal, single-cylinder, single flywheel, mounted on top of freestanding boiler. Called "Frisbie, 1871". This engine was featured in "Live Steam & Outdoor Railroading" magazine, Part 1,2,3 & 4 in March/April, July/August, Sept/Oct and Nov/Dec issues, 1999.
A photo of Bob's pencil drawing for this engine is shown here.
20. Oscillator, horizontal, single-cylinder, single flywheel.
21. Oscillator, horizontal, single-cylinder, single flywheel. (slightly larger version of No.20).
A photo of Bob's pencil design drawing for this engine is shown here.
22. Vertical, single-cylinder, single-action, 2-support column, single spoked flywheel, rotary valve, "Scientific American" engine. This engine was featured in a Lindsay books publication titled "Scientific American Suplement" from May 7th, 1881. Link as follows: http://www.lindsaybks.com/gallery/Jorg/engines/saart.html A copy of Bob's pencil drawing for this model is shown here.
-22a. (2nd copy of "Scientific American" engine)
-23. Vertical, single-cylinder, overhead piston valve parallel with crankshaft, single flywheel, wood engine frame. This engine was featured in "Live Steam & Outdoor Railroading" magaine, March/April, 2000, p.14.
-24. Oscillator, single-cylinder, single flywheel, with vertical steam boiler.
-25. Vertical, single-cylinder, small 4-column engine, single flywheel.
-26. Vertical, single-cylinder, small 2-column engine, single flywheel, Scottish Yoke design.
27. Oscillator, inverted vertical, twin-cylinder, 4-column support "Scoot". (Bob built this with one of his grandsons). This engine was featured in "Home Made Steam Engines, Volume 1 - The Wobblers", Edward G. Warren, Camelback Books, 1998.
28. Horizontal, single-cylinder horizontal engine with single flywheel, round crosshead and crosshead guide. (Bob built this with one of his grandsons, similar to design as No.9 except with single flywheel and open crank).
-29. Vertical single-cylinder, single flywheel hoist engine. (Bob obtained the cylinder of an old hoist engine, and constructed a 4-column frame, cranshaft, connecting rod, crosshead, dual eccentrics, and reverse gear.
-30. Vertical 2-leg oscillator (similar to No.18, but with 2-support columns).
