- Holder
- Wright Aeronautical Division Curtiss-Wright Corporation
- Revision
- 0
- Status
- Current
- Product
- Engine
- Models
- 2
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 2
| Model | Also known as | Note |
|---|---|---|
| Cyclone SGR-1820F-31 | ||
| Cyclone SR-1820F-31 |
Airworthiness directives · 0
ADs whose products are models on this data sheet, matched by model and maker.
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STCs approved under this data sheet · 1
PMA parts · 1
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What the data sheet saysOCR
This is OCR from the scanned FAA data sheet. OCR can misread letters and numbers.
MOLEIS: Wright Cyclone SR-1820F-31 and SGR-1820F-31
I-C. NUMBER: AIC 101
Model - Cyclone SR-18 20F-31 SGR-1820F-31
Type - 98A Direct drive 8:5 or 16:11 reduction gearing
Rating:
Maximum continuous,
bç• rpm. at S.L.
pressure altitude 645-1900-32 112-5.L. 645-1950-32 1/2-5.1.
At rated pressure
altitude (It.) 670-1900-32 172-2500 670-1950-32 1/2-2500
Take-off (one minute),
645-1900-32 1/2 645-1950-32 172
Fuel (minimum octane
aviation gasoline) 80
Eore and stroke, in. 6.125 × 6.875
risplacement, cu. in. 1823
Compression ratio 6.4:1
Weight (dry), lbs. 900 980
Fropeller shaft, SAE NO. 40 spline 40 spline (8:5): 50 spline (16:11)
supercharging
(impeller gear ratio) 5.95:1
Carburetion Stromberg NAU-86 carburetor with
2-1/2 in. venturi
Ignition, dual Scintilla VAG-9IF magnetos
Certification basis Approved Type Certificate No. 101
NOIE 1. Apfroval expired 4/7/37. No engines of these models manufactured after that date eligible for use ir
certificated aircraft.
NOTE 2. Engine serial number 21027, converted to R-1820F-31 from R-1820F-3 model, eligible with the following
rating:
Maximum continuous, hp. rpm, in Hg.. at:
S.I. fressure altitude 858-1850-32 172-100
Rated Fressure altitude (ft.)
Take-off (one minute), hp. Ipm, in. Hg.