# TCDS ATC 159: 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/sha256/26/1f/261f6fa2059367daed6dfb9dd5394820a07be7c5975cb196e794e3e555b3b997
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F9CCAC6DC19742CD8525670E006590C3.0001
- Page: https://openairdocs.org/tcds/ATC%20159

## Models (2)

As the data sheet lists them.

- Cyclone GR-1820F-56
- Cyclone R-1820F-56

## What the data sheet says

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

```text
MODELS: Wright Cyclone R-1820F-56 and GR-1820F-56
I.C. NUMBER: ATC 159
Model - Cyclone  R-1820F-56  SR-1820F-56
Type - 9RA  Direct drive  16:11 reduction gearing
Rating:
Maximum continuous,
hp, Ipm, in.Hg., at:
Rated pressure
altitude  (ft.)  755-2100-34-0-11300  740-2100-34-0-11300
Sea level
pressure altitude  695-2100-34.0-S.L.  680-2100-34.0-S.I.
Take-off (one minute).
hp. rpm.  in igo, S.1.  785-2200-37.5  770-2200-37-5
Fuel  (minimum octane
aviation gasoline)  87
Fore and stroke, in.  6.125 × 6.875
Cisplacement, cu. in.  1823
Compression ratio  6.4:1
weight  (dry), Its.  1000
Fropeller shaft,
SAE No.  40
Supercharging
(impeller gear ratio)  8.83:1
Carburetion  Stromberg NA-F7F carburetor with
2-3/8 in. venturi, Holley C.G.
1375 C, E, F, H or Chandler-Evans
1375DA-1 carburetor
Ignition, dual  Scintilla VAG-9DF,  SF9L, SF9LN1,
SF9LN2, SF9L3 or SF9L4 magnetos
Certification basis  Approved Type certificate No. 159
NOIE nd 200 degrees r., respectively.  Maximum permissible cylinder head, barrel and oil inlet temperatures 500 degrees F., 325 degrees F..
NOTE 2.  32398 (tex model 2-1620-56) and 28243 (tox model c2-18201-56) eligiote for use ir. certificated arcraft.  expired 7/25/41.
```

## ADs (1, in force first)

- [AD 94-14-10](https://openairdocs.org/ad/94-14-10): Aviation Gasoline · Wright Aeronautical Division, Curtiss-Wright Cyclone R-1820F-2A, Cyclone R-1820F-3A, Cyclone R-1820F-56 and 6 more. Effective Feb 13, 1996

## 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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