# TCDS ATC 14: Pratt & Whitney Division

- Type: Type certificate data sheet
- Status: Current
- Holder: Pratt & Whitney Division
- Revision: 0
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/d6/d9/d6d9c7e56b0c676a7ba99c2a906671b53815712428422ad07b56c6005274fe83
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4E25CD9CAB01C1C38525670D005E855D.0001
- Page: https://openairdocs.org/tcds/ATC%2014

## Models (5)

As the data sheet lists them.

- Wasp A
- Wasp C
- Wasp CD
- Wasp B
- Wasp C1

## What the data sheet says

This is OCR from the scanned FAA data sheet. OCR can misread letters and numbers.

```text
MODEIS:  Pratt & Whitney wasp A, B, C, C1, CD
I.C. NUMBER:  AIC 14
Model  Wasp C1  Wasp CD
Tyre  9RA
Rating:
Maximum continuous,
hr.  rom, at s.I.
pressure altitude  420-2000-S. L.  450-2100-5.I.
Take-off (one minute),
hp, rpm, at full
throttle  420-2000  450-2100
Fuel  (minimum octane
aviation gasoline)  58  73
Fore and stroke, in.  5.75 × 5,75
Lisplacement, cu. in.  1344
compression ratio  5.25:1
height (dry), lts.  745  729
Crankshaft  gearing  Direct drive
Supercharging
(impeller  gear ratio)  7: 1
Carburetion:
Stremberg carburetor  NAY-7B  NA-Y8C-1
Venturi diameter, in.  1-3/4  1-15/16
Ignition, dual  Scintilla VAG-9I magnetos
NOTES  1, 3,
Certification basis  Approved Type Certificate No. 14
NCIE 1-  Wasp A, B and C, previous series of this engine, also eligible at ratings identical to model C1.
NOTE 2.  Serial numbers 2964, 2965, 2797 and 2974 only eligible.
NOTE 3.  Approval expired 1/8/36.  No engines of these models manufactured after this date of with serial
numbers above 5555 eligible for use in certificated aircraft.
NOTE 4_  serial numbers 817, 833, and 886 wasp B engines eligible with impeller gear ratio changed from
5:1 to 7:1.
```

## ADs (1, in force first)

- [AD 56-06-02](https://openairdocs.org/ad/56-06-02): Cylinder Flange Attaching Stud · Pratt & Whitney Division Double Wasp CA15, Double Wasp CA17, Double Wasp CA18 and 115 more

## STCs approved under this data sheet (1)

- [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC

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