# TCDS ATC 64: Wright Aeronautical Division Curtiss-Wright Corporation

- Type: Type certificate data sheet
- Status: Current
- Holder: Wright Aeronautical Division Curtiss-Wright Corporation
- Revision: 0
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/d6/98/d69839c0178252e5af2e0011889ab2ac629091acd9d27f2548d3e97cf889ee47
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1BF2C540CD6D6BC38525670E0066A7C6.0001
- Page: https://openairdocs.org/tcds/ATC%2064

## Models (2)

As the data sheet lists them.

- Whirlwind R-975C
- Whirlwind GR-975C

## What the data sheet says

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

```text
MODELS:  Wright Whirlwind R-975C, GR-975C
1.C. NOMBER: AIC 64
Model - Whirlwind  R-975C  GR-975C
Type - 9RA  Direct drive  1.58:1 or 2:1 reduction gearing
Fating:
Maximum continuous,
bp. rim, at S.I.
Fressure altitude  400-2300-S.I.
Take-off (one minute),
hp. Ipm, at full
throttle  400-2300
Fuel  (minimum octane
aviaticn gasoline)  73
Fore and stroke, in.  5.0 × 5.5
Lisplacement, cu.  in.  972
Compression ratio  6:1
keight  (dry), lts.  625
Supercharging
(imfeller gear ratio)  10.15:1
Carturetion  Stromberg  NA-R9 carburetor
Ignition.  dual  Scintilla VAG-9C magnetos
Certification rasis  Approved Type Certificate No. 6ª
NOTE 1.  Approval  expired 3/26/34.  No engines of these models manufactured after this date or with serial numbers
above  13434 eligible for use in certificated aircraft,
```

## ADs

None name its models.

## 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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