TCDS ATC 39: Pratt & Whitney Division Wasp Jr. A

Holder: Pratt & Whitney Division
Revision: 0
Status: Current
Product: Engine
Models: 1

The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.

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Models · 1

Model	Also known as	Note
Wasp Jr. A

Airworthiness directives · 7

ADs whose products are models on this data sheet, matched by model and maker.

AD 78-08-07Cylinder Head SeparationEffective May 2, 1978 AD 68-09-01Crankshaft Flyweight LinersEffective Jan 17, 1973 AD 70-10-02Gerotor Pump Drive Pin/Fuel Injector FilterEffective Jun 9, 1970 AD 66-14-04Cam Reduction Drive Gear AssemblyEffective Jul 9, 1966 AD 56-06-02Cylinder Flange Attaching Stud AD 57-05-04Crankshaft AD 56-26-03HistoricalCrankshaftPublished Apr 11, 1957 · Supersedes AD 54-22-02

STCs approved under this data sheet · 1

STC SE04651CHTo allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22Swift Fuels LLC

What the data sheet says

From the PDF’s text layer, line by line: tables lose their columns. The PDF is the record.

PRATT & WHITNEY AIRCRAFT DIVISION OF UNITED AIRCRAFT CORPORATION MODELS: Pratt & Whitney Wasp Jr. A T.C. NUMBER: ATC 39 Model Wasp Jr. A Type 9RA - Direct drive Rating: Maximum continuous, hp, rpm, at S.L. pressure altitude 300-2000-S.L. Take-off (one minute), hp, rpm, at full throttle 300-2000 Fuel (minimum octane aviation gasoline) 68 Bore and stroke, in. 5-3/16 x 5-3/16 Displacement, cu. in. 985 Compression ratio 5: 1 Weight (dry), lbs. 565 Supercharging (impeller gear ratio) 7: 1 Carburetion Stromberg NA-R9B carburetor Ignition, dual Scintilla VAG-9D magnetos Certification basis Approved Type Certificate No. 39 NOTE 1. Approval expired 1/8/36. No engines of this model manufactured after this date or with numbers above 121 eligible for use in certificated aircraft.