# TCDS ATC 148: 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/sha256/70/12/7012a6b0e64024e6c1e2cb96ec8caabdccd2a64fdfeb183219ceed0e5f73c4a0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6119686A1C7174C98525670E006549AD.0001
- Page: https://openairdocs.org/tcds/ATC%20148

## Models (4)

As the data sheet lists them.

- Cyclone GR-1820F-62
- Cyclone SGR-1820
- Cyclone GR-1820
- Cyclone SR-1820

## What the data sheet says

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

```text
MCDELS: Wright Cyclone SR and SGR-1820F-2B, -52, -52A, R ard GR-1820F-62
1.C. NUMBER: AIC 148
Type - 9RA  Model - Cyclone  gearing  GR- 1820  F-52 and F-2A  16:11 reduction  Direct drive  SR- 1820  and F-2B  SGR- 1820  16:11 reduction  gearing  F-56 and F-2B  SGR-1820  F-52A  16: 11 reduction  gearing  R and GR- 1820F-62  Direct drive or 16:11  reduction gearing
Rating:
Maximum continuous,
Rated pressure  altitude (ft.)  in.Hg., at:  750-1950-  36.0-2600  775-2100-  34.5-5800  760-2100-  34.5-5800  770-1950-  750-1950-  36.5-3000  35.4-6000  81 0-2350-  810-2350-
s.I. pressure  altitude  745-2100-  34.5-S.I.  34.5-S.I.  36.5-S. L.  37.0-S.L.
Take-off  ne. rEm. in. Hg.  (one minute),  750-1950-36.5  890-2200-39.0  875-2200-39-0  790-1950-38-0  900-2350-40.0
Fuel  (minimum octane
aviation gasoline)  87
Fore and stroke, in.  6_125 × 6.875
Lisplacement, cu. in.  1823
Compression ratio  weight (dry), 1bs.  6.4:1  1095  T000  1095  1095  1095  1000 (direct),  (geared)
Propeller shaft,  SAE No.  80  40  50  50  40 (direct),  50 (geared)
supercharging
(impeller gear ratio)  7:1
Carburetion  tromberg NA-F7C
in. venturi 2-3/8  NA-F7F with  A-FTE with 2-1/
in. venturi, or
Holley C.G.  1375
or H, or
Chandler-Evnas
1375 CA-1
carburetor
Ignition, dual  Scintilla VAG-9DF,  SF9LN1,
or SF914 magnetos -.
Certification basis  NOTES  3.4  Approved Type Certificate No. 148  4, 0  4, 6  1,4,5  2, 4
NOTE hich is engi in the cacche se 208-52 enginder barrel numbex 63549 instead of nitrided barrel number 63550
NOIB 3740, est, ines are similar to the F-52 engine except that they incorporate heavier valve springs numbers
NOTE 3. Includes Cyclone GR-1820F-52 engines numbers 25319, 25320, 25321, 25322, and 29103.
NOTE 4. Maximum permissible cylinder head, barrel, and oil inlet temperatures, 500 degrees F., 325 degrees F..
and 200 degrees F., respectively.
The with serial lumber tex than are eligible for in certificated aircraft.  No engines of this model manufactured after
NOTE rom the ovdelef delester the alte are engine de expedicated ai engines modified to these models
```

## 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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