# TCDS ATC 103: 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/f4/71/f47172b22e3f89e066fd669544d205f273d587fe39e1088bf28e5b4ae2cdd0cc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0D5FB6B3EC8506008525670E00655C38.0001
- Page: https://openairdocs.org/tcds/ATC%20103

## Models (4)

As the data sheet lists them.

- Cyclone SR-1820F-3
- Cyclone SGR-1820F-3
- Cyclone R-1820F-3A
- Cyclone GR-1820F-3A

## What the data sheet says

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

```text
MODELS: Wright Cyclone SR and SGR-1820F-3, R and GR-1820F-3A
I.C. NUMBER: ATC 103
Model - Cyclone  SR-18 20F-3  SR-1020F-3  R-1820F-3A  SGR- 18 20F - 3  SGR-1820F-3  GR-1820F-3A
Type - 9RA  Direct drive  Direct drive  Direct drive  8:5 reduction  8:5 Or 16:11  16:11 reductior.
gearing  reduction  gearing
gearing
Rating:
Maximum continuous,
hp. Ipm. in. Mg.. at:  Rated  pressure  710-1950-  710-1950-  715-1950-  710-1950-  700-1950-  700-1950-
altitude (ft.)  34 1/2-5500  34  182-7000  33 182-7800  34 1/2-5500  34 1/2-7000  33 1/2-7800
S.L. pressure  650-1950-  650-1950-  650-1950-  650-1950-  645-1950-  645-1950-
altitude  34 1/2-S.L.  34 1/2-5.1.  33 1/2-S.I.  34 1/2-S.I.  34 1/2-S.I.  33 1/2-S.L.
Take-off  (one minute),
hp. rpm, in. Hg.  710-1950-  730-1950-36  710-1950-  710-1950-  710-1950-36
36 1/2  37 1/2  37 1/2
710-1850-37
710-1800-
37 1/2
Fuel (minimum octane
aviation gasoline)  87
Fore and stroke, in.  6.125 × 6.875  - -
tisflacement,  cu. in.  1823  - _
Compression ratio  weight (dry), lbs.  6.4:1  965  1060  _ _  - _
Fropeller shaft,
SAE NO.  40  10(0:2)  50
50  16:11
Supercharging
(impeller gear ratio)  8.31:1  - _
Carburetion  Stromberg  Stromberg  Stromberg  Stromberg
NA-U8 H  NA-FTC 0I  NA- 08H  NA-F7C or
NA-F7E  NA-F7E
Venturi diameter, in.  2-112
Ignition, dual  scintilla  - -
VAG-9DF-R5
SF9L Or SF9LN
magnetos
NOTES  AfFroved Type Certificate No. 1032, 3  2, 3  2, 3  2, 3  1. 2, 3
Certification tasis
NOTE 1. These engines equipped with F-50 type cylinders.
NOIE 2. 80 octane aviation gasoline may be used provided 550 hf is not exceeded.
Approval expired 7/12/37.  No engines of these models manufactured after this date or with serial numbers
(models SR-1820F-3 and F-1820F-3A)  (models SGR-1820F-3 and GR-1820F-3A) eligibie for
use in certificated aircraft.
```

## 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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