Pratt & Whiney Double Wasp Overhaul Manual (ebook)

The Pratt & Whitney R-2800 Double Wasp is an American twin-row, 18-cylinder, air-cooled radial aircraft engine with a nominal displacement of 2,800 cu in (46 L), and is part of the long-lived Wasp family of engines.
Produced from 1939 to 1960, the R-2800 saw widespread use in major American aircraft during and after World War II, including the Grumman F6F Hellcat, Vought F4U Corsair, and Republic P-47 Thunderbolt. It was developed into numerous military and commercial variants for fighters, attack aircraft, patrol aircraft, transports, and airliners, with changes in supercharging, fuel systems, water injection, reduction gearing, and accessory arrangements.

This Overhaul Manual contains the information required for the major overhaul of Double Wasp "A” and "B” series engines with the single stage, single and two-speed superchargers. It is our object to furnish overhaul and repair activities with the most up-to-date and best knowledge avail- able on the maintenance of Double Wasp engines. Any specific information not contained in this Manual will be gladly furnished by the Pratt & Whitney Aircraft Service Department to whom maintenance inquiries should be directed.
For military operations where power output is dictated by tactical requirements, it is desirable
that engines be operated not in excess of 350 hours, flight time, before first overhaul, until consider- able satisfactory experience is gained. Extension of time between overhauls should be predicated upon such experience with the particular engine model in a given type of operation and should be governed by the condition of the engines at overhaul, together with their record of dependability. It is important to couple such experience with the tactical requirements of the aircraft which might, for example, demand extraordinary power outputs. It is suggested that overhaul period increases be made in increments of 15% flight hours.
Operations which allow engines to be cruised at relatively low power, such as in long range or transport service, result in longer permissible overhaul periods. Where conservative cruising out- puts can be consistently maintained, 600 to 1000 hour overhauls are feasible but such times should be approached gradually, experience again being the deciding factor.
Oil consumption is usually one of the best indications as to whether or not the engine requires overhaul, providing the engine is performing normally, and there is no evidence of possible trouble or irregularities requiring more than normal line maintenance attention. A sudden increase in oil consumption, or a gradual increase to double what has previously been found average, is usually cause for overhaul.
An alphabetical Tool List is placed at the end of each chapter to be used in conjunction with the text. Each tool mentioned in the text is capitalized to facilitate reference to this Tool List. Reference to the right and left sides of the engine and to the orientation of various parts will apply as viewed from the rear end of the engine with the propeller shaft in a horizontal (flight) position, unless otherwise specified. 

405 pages - PDF to download