JF Ptak Science Books Quick Post
I just wanted to take a moment and compliment those responsible for crafting these fine engine catalogs for the famous Pratt & Whitney Twin Wasp engines. The 46 liter twin-row, 18-cylinder air-cooled radial engines were among the finest of their kind ever constructed, and were flown in some of the greatest aircraft produced by the United States (including the A-36 Invader, P-61 Black Widow, P-47 Thunderbolt (!), F4U Corsair (!), DC-6, C-46 Commando, and others).
The first of two catalogs here for the Double Wasp R-2800-CA was produced by Pratt & Whitney in 1946 and for its 112 pages looks like a superior maintenance catalog, with concise and well written explanations and clear illustrations. It also has a great cross section which utilizes a black background, making the image jump from the page. (You can compare it with a similar image taken from a Twin Wasp catalog four years later; I'm not sure more use of the black background is not made.)
The second manual (Twin Wasp 2SD13-G and D5 Engines) was a restricted document when produced in 1949, and was much chunkier (170+pp), and somehow seems a lot more accessible to the not-a-mechanic writer. There is even a six-page "Unpacking the Engine" chapter with many photo illustrations--now it seems like reading the table of contents and seeing the six pages dedicated to unpacking was a little over the top, it turns out when you read the section and see the gigantic wood en box it came in and the other packing bits around it, you actually could use an unpacking manual. It is just an impressive document.
- If you had use for such thing they are both offered for sale in the blog's bookstore, here.