# TCDS ATC 91: 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/sha256/61/5c/615ce2fbe2812030e8b00e9aa30eacae3dd871ee972d0c71405771df2979c927
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/22DD32675BE0C7A58525670D005FC9F4.0001
- Page: https://openairdocs.org/tcds/ATC%2091

## Models (1)

As the data sheet lists them.

- Wasp T1D1

## What the data sheet says

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

```text
MODELS: Fratt & whitney wasp TIDI
I-C. NUMBER: AIC 91
Model - Wasp  T1D1
Type - 9RA  Direct drive
Rating:
Maximum continuous,
hp. rpm, at S.I.
pressure altitude  525-2100-9.L.
Take-off (one minute),
hr. rpm, at full
throttle  525-2100
Fuel (minimum octane
aviation gasoline)  80
Pore and stroke, in.  5.75 x 5.75
Cisplacement,  cu. in.  1344
Compression ratio  6: 1
keight  (dry) , ibs.  730
Fropeller shaft,
SAE NO.  30
Supercharging
(impeller gear ratio)
Carturetion  Stromberg NA-Y8F carburetor with 2-3/16 in. venturi
Ignition,  dual  Scintilla VAG-DE magnetos
Certification rasis  Approved Type Certificate No. 91
NOTE 1.  Approval expired 7/16/36.  No engines of this model manufactured after this date or with serial numbers
above 6129 eligible for use in certificated aircraft.
```

## 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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