- Holder
- Curtiss-Wright/Marquette Inc.
- Revision
- 2
- Revised
- December 28, 1983
- Status
- Current
- Product
- Engine
- Models
- 3
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 3
| Model | Also known as | Note |
|---|---|---|
| Cyclone 742C14BB2 | Formerly Wright Aeronautical Division | |
| Cyclone 742C14BB1 | Formerly Wright Aeronautical Division | |
| Cyclone 742C14BB3 | Formerly Wright Aeronautical Division |
Airworthiness directives · 0
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What the data sheet says
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1 2
2 2
Reformatted 11/93
DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
E-248
Revision 2
WRIGHT
CYCLONE 742C14BB1, 2, 3
DECEMBER 28, 1983
TYPE CERTIFICATE DATA SHEET NO. E-248
Engines of models described herein conforming with this specification and approved data on file with the Civil Aeronautics
Administration are rated as airworthy for use in certificated aircraft in accordance with pertinent aircraft specifications.
Manufacturer: Curtiss Wright/Marquette Inc.
Fountain Inn, S.C.
Model: Cyclone 742C14BB1, 2, 3
Type: 14RA .4375:1 Reduction gearing
Rating:
Maximum, except take-off;
hp, rpm, in.Hg., at:
Rated Pressure altitude (ft.) 1600-2400-40.0-4000
Sea level pressure altitude 1600-2400-41.0-S.L.
Take-off (Five minutes)
hp, rpm, in. Hg., at:
Sea level pressure altitude 1900-2800-46.5-S.L.
Fuel (Minimum octane aviation gasoline) Grade 100/130
Bore and stroke, inches 6.125 x 6.312
Displacement, cubic inches 2603
Compression ratio 6.9:1
Weight (dry), lbs. 2090, 2095, 2065
C.G. location (dry)
Fwd. of mounting boss in. 12.43
Above prop. shaft, in. .31
Supercharging (Impeller drive ratio) 7.07:1
Propeller shaft, SAE No. 50
Carburetion Stromberg PR48A3 carburetor
Ignition, Dual Bosch SF14LU-10 Magnetos
Timing, °BTC 20
NOTES 1, 2, 3, 4
"- -" indicates "same as preceding model"
"" indicates "does not apply"
Certification basis Type Certificate No. 248
Production basis Production Certificate No. 8
NOTE 1. The maximum permissible temperatures are as follows:
Cylinder head Cylinder barrel Oil inlet
Take-off, °F 500 325 220
METO, °F 475 325 220
E-248
Page 2
NOTE 2. The following accessory drive provisions are provided:
Accessory *Drive Ratio *Rotation
Maximum
Continuous
Torque-in. lbs.
Static
Starter 1.000 C 25800
Generator 3.150 C 415 3500
Hydraulic Pump 1.500 CC 150 2250
Vacuum Pump 1.500 CC 50 1200
Fuel Pump 0.875 CC 25 450
Propeller Governor 0.992 CC 65 600
Drive Ratio is times crankshaft rpm.
Rotation is C=clockwise; CC=counterclockwise.
NOTE 3. The 742C14BB1, 2, and 3 engines are characterized by the following differences:
Cylinder
Model Supercharger 2nd Order Balancer Air Baffle Type
742C14BB1 Single, 7.07:1 Yes Ducted
742C14BB2 2-speed, locked in Yes Ducted
low ratio, 7.06:1
742C14BB3 2-speed, locked in No Standard
low ratio, 7.06:1
NOTE 4. The above engines incorporate a 3½ order and 7 order vibration damper and an integral torque meter.
.....END.....