# TCDS ATC 90: 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/sha256/03/e2/03e290680caf6b14bb55f54f5c23f903347766948aa10a96421831fc5d27c883
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6A646F006B5F981B8525670D005F5B7A.0001
- Page: https://openairdocs.org/tcds/ATC%2090

## Models (3)

As the data sheet lists them.

- Wasp S1D1-G
- Wasp TD1
- Wasp S1D1

## What the data sheet says

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

```text
MODEIS: Fratt & Whiteny Wasp S1D1, 31D1-G, ID1
1.C. NUMEER: ATC 90
Model - Wasp  S 1D1-G
3:2 reduction gearing
vaximum continuous,
kated pressure
- _
542-2200-33-5.1.
(one minute).
Fore and stroke, in.
Displacement
weight (ary)  815
Fropeller shaft,
40
Supercharging
- -
Stromberg NAY-8F or
carburetor with 2-1/2  in. venturi
Scintilla VAG-9C magnetos
Certification basis  Approved Type Certificate No. 90
2000 Ipm with 73 octane fuel and StromLerg NAY-7B carburetor provided a 1-9/16
inch venturi choke is used in the carturetor and the Pratt & whitney warning plate is attached to the
pFroval expired 7/16/36  No engines of these models manufactured after this date or with serial
numbers  łove 6146 eligible for use  in certificated aircraft,
Engine serial number 5245 not eligitle for use in certificated aircraft because it contains unapproved
parts and because unsatisfactory practices were employed in its assembly.
```

## 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 (2)

- [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
- [STC SE1864CE](https://openairdocs.org/stc/SE1864CE): Operation of engine on unleaded automotive gasoline.. Petersen Aviation Inc

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