# TCDS E-219: Curtiss-Wright/Marquette Inc.

- Type: Type certificate data sheet
- Status: Current
- Holder: Curtiss-Wright/Marquette Inc.
- Revision: 9
- Revised: December 28, 1983
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/12/84/1284fe2cbc9e420610509632b3d6fce32c11fedddea3cadd0e62b0ec2099308c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/158515E26A46EF168525670B006C2D21.0001
- Page: https://openairdocs.org/tcds/E-219

## Models (30)

As the data sheet lists them.

- Cyclone 728C9GC1
- Cyclone 702C9GC5
- Cyclone 728C9GC2
- Cyclone 730C9GD2
- Cyclone 730C9GD3
- Cyclone 702C9GC2
- Cyclone 731C9GC1
- Cyclone 731C9GC2
- Cyclone 730C9GD6
- Cyclone 730C9GM6
- Cyclone 704C9GC1
- Cyclone 730C9GM3
- Cyclone 730C9GM4
- Cyclone 704C9GC5
- Cyclone 704C9GC3
- Cyclone 702C9GC4
- Cyclone 728C9GC4
- Cyclone 702C9GC3
- Cyclone 704C9GC2
- Cyclone 730C9GM5
- Cyclone 730C9GD1
- Cyclone 730C9GM2
- Cyclone 704C9GC4
- Cyclone 728C9GC6
- Cyclone 730C9GD5
- Cyclone 728C9GC5
- Cyclone 702C9GC1
- Cyclone 730C9GD4
- Cyclone 702C9GC6
- Cyclone 728C9GC3

## What the data sheet says

From the PDF's text layer, line by line; tables lose their columns. The PDF is the record.

```text
Page No. 1 2 3 4
Rev. No. 9 9 9 9
Reformatted 10/94
FEDERAL AVIATION AGENCY
E-219
Revision 9
WRIGHT
Cyclone
702C9GC1, 2, 3, 4, 5, & 6
(GR-1820G-202A; Military R-1820-60, -71)
704C9GC1, 2, 3, 4, & 5 (GR-1820G-205A;
Military R-1820-87, -95)
728C9GC1, 2, 3, 4, 5, & 6
730C9GD1, 2, 3, 4, 5, & 6
731C9GC1 & 2
December 28, 1983
AIRCRAFT ENGINE SPECIFICATION
Engines of models described herein conforming with this specification and approved data on file with the Federal Aviation
Agency, meet the minimum standards for use in certificated aircraft in accordance with pertinent aircraft specifications and
applicable portions of the Civil Air Regulations provided they are installed, operated, and maintained as prescribed by the
approved manufacturer's manuals and other approved instructions.
Manufacturer Curtiss Wright/Marquette, Inc.
Fountain Inn, South Carolina
Model  Cyclone 702C9GC1, 2, 3, 4, 5, & 6 728C9GC1,2,3,4,5 & 6
Type 9RA-Propeller reduction gearing 3:2 on models 1,2,3 & 4
16:9 on models 5 & 6 3:2
Rating (with low impeller gear ratio)   7:1 - -
Maximum continuous,
  hp, rpm, in.Hg., at:
Rated pressure altitude (ft.) 1100-2400-40.0-5500 1100-2400-41.5-4600
  or 1000-2300-37.2-6900   or 1000-2300-38.5-6000
Sea level pressure altitude 1100-2400-43.0-S.L. 1100-2400-44.0-S.L.
  or 1000-2300-39.5-S.L.   or 1000-2300-41.0-S.L.
  Takeoff (5 minutes) hp, rpm, in. Hg. 1200-2500-45.5 1200-2500-47.0
  or 1100-2350-43.0
Rating (with high impeller gear ratio)  
Maximum continuous,
  hp, rpm, in.Hg. at:
Rated pressure altitude (ft.)  
Low critical pressure altitude (ft.)  
Takeoff (5 minutes), hp, rpm, in. Hg., at:
Rated pressure altitude (ft.)  
Low critical press. altitude (ft.)  
Fuel (Minimum grade aviation gas.) 91/96 - -
Bore and stroke, in. 6.125 x 6.875 - -
Displacement, cu. in. 1823 - -
Compression ratio 6.7:1 6.3:1
Weight (dry), lbs. 1310 for models 1,2,3,4 & 5 1310 for mod. 1,2 & 5
1315 for model 6 1325 for mod. 3, 4 & 6
C.G. location (dry)
Fwd. of mounting face, in. 7.5 - -
Above prop. shaft, in.   .4 - -
"- -" indicates "same as preceding model."
"" indicates "does not apply."

E-219 2
Model  Cyclone 702C9GC1, 2, 3, 4, 5, & 6 728C9GC1,2,3,4,5 & 6
Propeller shaft, SAE No. 50 - -
Crankshaft dampers - torsional 4½ order - front and rear - -
Carburetion Stromberg PD-12H3 or B7 for Stromberg PD-12H3 or B7 for
  engine models 1 & 4   engine models 1 & 3
Stromberg PD12K10 for models Stromberg PD12K10 for models
  3, 5 & 6   5 & 6
Holley 1375C,E,F,H,HA or HAR Holley 1375C,E,F,H,HA or HAR
  for model 2   for models 2 and 4
Ignition, dual Scintilla SF9L-3,-4, SF9LN-4, or
Bosch SF9LU-3, magnetos
 - -
Ignition timing - °BTC 20 - -
Spark plugs See NOTE 8 - -
NOTES 1,4,5,6,7,8 1,5,6,7,8
Model  Cyclone 730C9GD1,2,3,4,5 & 6 704C9GC1,2,3,4 & 5 731C9GC1 & 2
Type 9RA-Propeller reduction gearing 3:2 on models 1,2,3 & 4
3:2 16:9 on model 5 16:9
Rating (with low impeller gear ratio) 7:1 7.14:1 7.13:1
Maximum continuous,
hp, rpm, in.Hg., at:
Rated pressure altitude (ft.) 1100-2400-39.8-5500 1100-2400-40.0-5500 1100-2400-42.0-4000
or 1000-2300-36.7-6900   or 1000-2300-37.2-6900 1000-2300-38.5-5500
Sea level pressure altitude 1100-2400-42.5-S.L. 1100-2400-43.0-S.L. 1100-2400-43.0-S.L.
or 1000-2300-39.0-S.L. or 1000-2300-39.5-S.L. 1000-2300-39.5-S.L.
Takeoff (5 minutes) hp, rpm, in. Hg. 1200-2500-45.0 1200-2500-45.5 - -
or 1100-2350-43.0 - -
Rating (with high impeller gear ratio)  10:1 10:06:1
Maximum continuous,
hp, rpm, in.Hg. at:
Rated pressure altitude (ft.)  900-2300-40.0-15200 900-2300-42.0-15000
Low critical pressure altitude (ft.)  900-2300-42.5-9700 900-2300-43.0-10000
Takeoff (5 minutes), hp, rpm, in. Hg., at:
Rated pressure altitude (ft.)  1000-2500-44.5-14200 1000-2500-47.0-14000
Low critical press. altitude (ft.)  1000-2500-46.0-9200 1000-2500-48.0-9000
Fuel (Minimum grade aviation gas.) - - 91/96 (Grade 100/130 for - -
rated high ratio takeoffs)
Bore and stroke, in. 6.125 x 6.875 - - - -
Displacement, cu. in. 1823 - - - -
Compression ratio 6.2:1 6.7:1 - -
Weight (dry), lbs. 1310 for mod. 1,2 & 5 1320 for models 1,2 & 5 1320 for model 1
1325 for mod. 3,4 & 6 1335 for models 3 & 4 1326 for model 2
C.G. location (dry)
Fwd. of mounting face, in. 7.5 - - 7.2
Above prop. shaft, in. .4 - - .2
Propeller shaft, SAE No. 50 - - - -
Crankshaft dampers - torsional 4½ order - front and rear - - - -
Carburetion Stromberg PD-12H3 or B7 - - Stromberg PD-12K10
for engine models 1 & 3
Stromberg PD12K10 for Stromberg PD-12K10 for - -
models 5 & 6 model 5
Holley 1375C,E,F,H,HA or - - - -
HAR for models 2 and 4
"- -" indicates "same as preceding model."
"" indicates "does not apply."

3 E-219
Model  Cyclone 730C9GM, 2,3,4,5 & 6 704C9CG1,2,3,4 & 5 731C9GC1 & 2
Ignition, dual Scintilla SF9L-3,-4,
SF9LN-4, or Bosch
SF9LU-3, magnetos
Scintilla SF9L-4
magnetos
Scintilla SF9LN-4
magnetos
Ignition timing - °BTC 20 - - - -
Spark plugs See NOTE 8 - - - -
NOTES 1,3,5,6,7,8 1,2,4,5,6,7,8 1,5,6,7,8
"- -" indicates "same as preceding model."
"" indicates "does not apply."
Certification basis Type Certificate No. 219
Production basis Production Certificate No. 8
NOTE 1. Maximum permissible cylinder head, barrel and oil inlet temperatures, 450°F, 325°F and 220°F, respectively.
NOTE 2. Models 7049GC1, 2, 3, 4, and 5 are eligible with an equivalent roller clutch 2-speed supercharger with drive ratios
7.134:1 and 10.06:1.
NOTE 3. Models 730C9GD - are similar to the models 702C9GC- and 728C9GC- except for the use of forged type cylinder
heads which have a 1/8 in. larger exhaust port and other major differences as indicated.
NOTE 4. Military model R-1820-71 is equivalent to civil model 70209GC1, Military models R-1820-87 and -95 are
equivalent to civil model 704C9GC1.  The -87 differs from -95 only in the cylinder baffles and accessories section.
Model R-1820-60 may be converted to civil model Cyclone 702C9GC1 in accordance with Wright Aeronautical
Corporation's instructions to incorporate at least the following new parts:
Supercharger impeller shaft, gear, cover, etc. Nos. 412379, 66682, 66681, 66386, 4040D5 and 34D33
(Remove high blower parts)
Breather assembly Nos. 68531, 2075D15, 206709.
Hydro oil connection Nos. 68529, 66251, 68530, 68533, 175D7
Carburetor PD-12H3 setting No. 68973N35A
When these military engines are used in certificated aircraft, the engine designation plate should be stamped with the
corresponding certificated model designation.  If there is no room for this information on the existing plate, such
information may be stamped on a plain thin metal plate attached beneath the existing plate by at least two of the
mounting screws, or a new plate may be secured from the manufacturer.
NOTE 5. Models 702C9GC6; 728C9GC3, 4 & 6; 730C9GD3, 4 & 6; 704C9GC3 & 4; and 731C9GC2 incorporate a
torquemeter built into the engine nose section.
NOTE 6. The above listed power ratings are based on best power mixture at altitudes except for those shown for models
731C9GC1 & 2 which are based on Auto-Rich settings.  The 702C9GC series engines are eligible with the following
Auto-Rich altitude ratings when using carburetor settings Nos. 68973N35A, 68973N39A or 69267N30A:
Maximum continuous, hp, rpm, in.
Hg., at rated pressure altitude (ft.) 1100-2400-42.0-3700
or 1000-2300-38.5-5200
NOTE 7. The following accessory drives are provided: Maximum Torque (in. lb.) Maximum Overhang
Rotation* Speed** Continuous Static (in. lb.)
Starter C 1:0  25800 300
Generator and Accessory gear C 1:5 600 6000 350
Generator and accessory gear 350
  (Model 702C9GC4 only) C 3.27 230 1150
Fuel Pump CC 1.0 16.5 450 
Vacuum Pump CC 1.5 50 1200 25
Hydraulic Pump CC 1.5 150 2250 50
Propeller Governor C 1.0 260 2000 
  *"C"  =  Clockwise viewing pad. "C"  =  Antilockwise viewing pad.

E-219 4
**"Speed"  =  Times crankshaft speed.
NOTE 8. The following spark plugs are approved on these engines.
AC 171, 181, 271, 281, 273, LS-87*, LS-88.
BG 3B2, 3B2S, 4B2, 4B2S, 314GS, RB19R-2, RB27R-1.
Champion R115, C27S, RC34S, RC35S, ED41N, EM41N, R37S-1, REA37N, REB37N, RHA37N, RHB37N,
RHA37E, RHB37E.
Hahn 702.
Jet Ignition J1-1**, J1-1A**.
* Limited to use with engines of 1200 hp and under, and for 120 hours of service with no reconditioning permitted.
** Limited to use with engines of 1300 hp and under, and for 120 hours of service with no reconditioning permitted.
....END....
```

## ADs (1, in force first)

- [AD 51-12-01](https://openairdocs.org/ad/51-12-01): Piston Pins · Wright Aeronautical Division, Curtiss-Wright 718C9GB1, Military Cyclone R-1820 Series, Cyclone 702C9GC1 and 29 more

## STCs approved under this data sheet (4)

- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc.
- [STC SE5189NM](https://openairdocs.org/stc/SE5189NM): Installation of chip detector light system.. A & L Aircraft Parts Inc
- [STC SE3-2](https://openairdocs.org/stc/SE3-2): Installation of fuel flow meter, Bendix Model 9054-5A.. Sabreliner Aviation LLC
- [STC SE1083GL](https://openairdocs.org/stc/SE1083GL): Installation of Shadin fuel flow transducer.. Shadin Company Inc

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