# TCDS TC 125: 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/sha256/04/2d/042d0ea950357b9df7e436362e02c894818503b8186cb4b8653a48e0c339582a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AE008274229AEC838525670E0066BF4B.0001
- Page: https://openairdocs.org/tcds/TC%20125

## Models (1)

As the data sheet lists them.

- Whirlwind R-975E-3

## 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-975E-3
T.C. NUMBER: T.C. 125
Model - Whirlwind  R-975E-3
Type
Maximum continuous,
of, Ipm, in.8g., at:
Rated
altitude (ft.)  420-2200-34-5-1400
S.L.
altitude (ft.)  420-2200-34.8-S.I.
Take-off (one minute).
bf. rpm, in.Hg.  450-2250-36.5
Fuel  quinimum occane
aviation gasoline -
CFR Motor Method fuel)  80
Pore and stroke, in.  5.0 x 5.5
cisplacement.  cu. in.  972
compression ratio  6.3:1
Weight (dry).  ibs.  675  (See NOTE 2)
C.G. location (dry)
Forward of mounting
face, in.  7-0
Below propeller
shaft,  in.  0_2
Fropeller shaft,
SAE NO.
supercharger gear ratio  10.15:1
Carcuretion  Stromberg NA-R9A carburetor with 2-5/8 in. venturi
Ignition, dual  scintilla VAG-SIF or SF-9R magnetos
Ignition timing,
degrees BTC  25
Certification Lasis  Type Certificate No. 125
Froduction basis  None.  The manufacturer does not hold a production certificate for the production of
engines under this type certificate and, therefore, each engine so produced is subject
to a detailed inspection for workmanshif and conformity with the approved data by a
Civil Aeronautics ADministration Agent.  In addition, the engine must have a satisfactory
cun-in including 5 hours at rated power and speed.  Upon satisfactory completion of the
above, the agent will tag the engine with Tag Form ACA 186.
NOIE 00 degrees F... respectively.  Maximum permissible cylinder head, barrel and oil inlet temperatures, 500 degrees F.. 325 degrees F., and
NOTE 2. Engine number 18165 eligible with "F" type cylinder heads, P/N 64408 with weight increase of 35 lks.
```

## ADs

None name its models.

## 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 SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc

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