This is a collection of engineering texts that have fallen into the public domain. The copyrights have been searched at http://www.scils.rutgers.edu/~lesk/copyrenew.html.
These books are the real deal, written for practicing engineers who might
actually be called upon to design something singlehandedly instead of being a
piece of a team. You'll be astonished to find that nothing much has changed
in the last century; the old guys knew their stuff backward and forward. In
many cases, these are the books that CF Taylor and John Heywood reference in
their later, derivative textbooks. Except these books were written by
engineers who had actually done it, not academics. I think you'll notice a
significant difference in the type of information presented.
Most of this stuff I scanned myself, at 300 DPI. The HTML is set to
"WIDTH=800" for the display size; you can change that if you have a high
resolution monitor.
"Scavenging of Two-Stroke Cycle Diesel Engines" Paul
H. Schweitzer, 1949, 270pp. == 18 Mb .PDF
This is the definitive work on big two-stroke Diesels. This is book is a
reference for the design of Diesel engines, not a generic "this is what
one looks like" like so many later texts have become.
"High-Speed Diesel Engines" P.M. Heldt, 1944, 430pp. == 77 Mb HTML
"Valvetrain Design" Michael C. Turkish, Eaton
Corp. 1946 == 13 Mb HTML
Until quite recently this was the only single book on camshaft design for
internal combustion engines. It was written by an engineer at Eaton
Corporation. I found a copy in a used book store for a few dollars. It
turned out the book had only a small printing and it quite rare.
"Cam Design - A Manual for Enginees, Designers, and Draftsmen"by Clyde Moon PE, Camco, 1961 69pp. == 4.2 Mb .PDF
General cam design reference by Commercial Cam Co. division of Emerson Electric
"Engine Dynamics and Crankshaft Design" Glenn D.
Angle, 1925 == 41 Mb HTML
This is, as far as I can tell, the only book out there dedicated entirely to
crankshaft design. I borrowed this copy from the General Motors Research
Laboratory.
"High Speed Combustion Engines" P.M. Heldt, 13th ed., 1946 == 146 Mb HTML
"Air-Cooled Motor Engines" Julius Mackerle,
1961 == 130Mb HTML
In many ways, reading Mackerle is like reading something from an alternate
universe. Mackerle was chief engineer at Tatra, in Czechoslovakia. Through
much of his working life he was isolated behind the Iron Curtain. So he wound
up doing a lot of basic research and design on his own, and went down a
slightly different path.
"Development of Aviation Fuels" S.D. Heron and "Development of Aircraft Engines by Robert Schlaifer, 1949 == 173 Mb .PDF
"The Aircraft Mechanic's Handbook" 1918 - covers Curtiss, Thomas-Morse, Gnome, Hispano-Suiza, Sturtevant, Hall-Scott, and Libery engines == 7.8 Mb .PDF
"Audels Gas Engine Manual" 1908, covers liquid and gaseous fueled engines == 14.4 Mb .PDF
"Dynamometers and the Measurement of Power" JJ Flather, U.Minn., 1900 == 7 Mb .PDF
"Fuels - Solid, Liquid, and Gaseous" H.Joshua Philliosn, Great Western Railway, 1891 == 4 Mb .PDF
"Gas, Gasoline, and Oil-Engines" Hiscox, Page, 1915 == 22.4 Mb .PDF
"Magnetos for Automobilists - How Made and How Used" Bottone, 1907 == 2.9 Mb .PDF
"Self-Propelled Vehicles - A Practical Treatise on the Theory, Construction, Operation, Care, and Management of All Forms of Automobiles" Homans, 1905 == 32 Mb .PDF