# TCDS TC 157: 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/sha256/7a/72/7a72d277d098837112c13aabba38dfbd99045b6330d135c0535a1a114529bcc9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E5232D021700D8E28525670E00659A62.0001
- Page: https://openairdocs.org/tcds/TC%20157

## Models (2)

As the data sheet lists them.

- Cyclone R-1820G-2
- Cyclone GR-1820G-2

## 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 and GR-18206-2, -2E and Military Models R-1820-49, -53, -55
I.C. NUMBER: T.C. 157
Model - Cyclone  R-1820G-2  GP-1820G-2
Direct drive  16:11 reduction gearing
Rating:
hE. rEm,  in. Hg., at:
Rated pressure
altitude (ft.)  850-2100-34-5-5800
Sea level pressure
altitude  820-2100-345-S.L.
Take-off (one minute),
in.Hg.  1000-2200-40.0
aviation gasoline)  87
Fore and stroke, in.  6.125 × 6.875
Displacement, cu. in.  1823
Comfression ratio  6-45:1
weight  1bs.  1103  1198
Fropeller shaft,
SAE NO.  50
Supercharging
(imfeller gear ratio)
Carturetion  Stromberg NA-F7F  Frolley C.G.  J or K with
2-3/8 in.
1375 C, 2, *•  H or Chandler-Evang
1375DA-1
Ignition, dual  Scintilla SF9L1, Sf9L2, SF9LN,
SF9LN1, SF9IN2, SF9L3 OL
SF9L4 magnetos
Certification basis  Type Certificate No. 157
Froduction basis  None.  The manufacturer does not hold a production certificate for the production of engires
inspection to demand contity in the poved data vile title.  workmanshif and  data by a Civil Aeronautics
an adaicion, cne engine must nave a satisractory run in incidaing
5 hours at  power and speed.  Upon satisfactory completion of the above, the agent
NOTES  1. 3,1 tag the engine with lag Form ACA 1,62, 3, 4, 5
linder head, barrel, and oil inlet temperatures, 500 degrees F., 300 degrees F.,
NOTE 2.  2A engines, numbers 25844 to 25850 inclusive, were subsequently modifief to model
Models R and GR-1820G-2E,  imilar to corresponding models R and GR-18206-2, eligible at weights (dry) of
incorporate the G-100 series steel crankcase.
KOTE WO43.  24005, 2405, 2551, 24033, 20054, 24037, 24028 2e eleven 20110ing at 29:  24040, 24041, 24042.
1pm  in. Hg.. at:
850-2100-35.5-5500
Sea level pressure altitude  820-2100-35.5-S.L.
Take-off (one minute), hp. rpm, in. Hg.  1000-2200-42.0
Eith the mary noturer instructiong to theorporate at leat the following new farts and setting settingccordar.ce
ModEl
R-1820-49 and -55  R-1820-53  The eat, an else me 6970, 516, 61975 one 108. ave 2 4 830  Supercharger impeller, P/N 27145; carburetor, Stromberg NAF7F2, settirg rumber 64551 or
(Remove all high ratio
drive parts.)
```

## 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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