# TCDS E-230: Pratt & Whitney Division

- Type: Type certificate data sheet
- Status: Current
- Holder: Pratt & Whitney Division
- Revision: 11
- Revised: September 15, 1975
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/96/bd/96bdfc3656cccd8c9afde5a188100af933cd48968fe004b22e7bf74531bf322b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/19F1C1C001A5A32B8525670D0062BACE.0001
- Page: https://openairdocs.org/tcds/E-230

## Models (8)

As the data sheet lists them.

- Twin Wasp D-3
- Twin Wasp D-7
- Twin Wasp 2SD1-G
- Twin Wasp D-4
- Twin Wasp 2SD-G
- Twin Wasp D-14
- Twin Wasp 2SD13-G
- Twin Wasp D-5

## 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
Rev. No. 11 11 11
Reformatted 11/94
DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
E-230
Revision 11
Twin Wasp Pratt & Whitney
2SD-G
    D-4
    D-3
    D-7
2SD1-G
2SD13-G
    D-5
    D-14
September 15, 1975
TYPE CERTIFICATE DATA SHEET NO. E-230
Engines of models described herein conforming with this data sheet (which is part of type certificate No. E-230) and other
approved data on file with the Federal Aviation Administration, meet the minimum standards for use in certficated aircraft in
accordance with pertinent aircraft data sheets 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 Pratt & Whitney Aircraft
Division of United Technologies Corporation
East Hartford, Connecticut  06108
Model   Twin Wasp 2SD-G 2SD1-G D-4 2SD13-G
Type     14RA- 2:1 reduction gearing - - - - - -
Rating
(With low imp. gear ratio) 7.15:1 - - - - - -
Max. continuous , hp.
rpm, in. Hg., at:
Critical alt. (ft.) 1100-2550-41.0-7400 1100-2550-36.5-8300 - - 1200-2550-40.5-5200
Sea level press. alt. 1100-2550-42.0-S.L. 1100-2550-38.5-S.L. - - 1200-2550-42.0-S.L.
Takeoff (five minutes),
hp, rpm, in. Hg., at:
Critical alt. (ft.)    1450-2700-49.5-1000
Sea level press. alt. 1350-2700-50.0-S.L. 1450-2700-50.0-S.L. - - 1450-2700-50.0-S.L.
(With high imp. gear ratio) 8.47:1 9.52:1  9.52:1
Max. continuous, hp.
rpm, in. Hg., at:
Critical alt. (ft.) 1000-2550-41.5-12400 1000-2550-37.5-17700  1100-2550-43.0-15000
Low critical press.
altitude (ft.) 1000-2550-42.0-10000 1000-2550-39.0-10000  1100-2550-44.0-7000
Fuel (Min. grade aviation gas.) Grade 100/130 - - - - - -
Lubricating oil See P&WA Serv.
Bulletin #1183
- - - - - -
Bore and stroke, in. 5.75 X 5.5 - - - - - -
Displacement, cu. in. 2004 - - - - - -
Compression ratio 6.5:1 - - - - - -
Weight (dry), lbs. (See NOTE 5) 1570 1590 1570 1605
Center of gravity location (dry)
Fwd. of mount pad C.L., in. 10.6 - - 10.9 10.6
Above prop. shaft C.L., in. .3 - - - - - -
Propeller shaft, SAE No. 50 - - - - - -
Carburetion Stromberg PD-12F7
carburetor with 3¼ in.
venturi
Stromberg PD-12F8 or F13 - - - -
Ignition, dual Scintilla SF14RN-8
magnetos
Scintilla high or low tension - - - -
Ignition timing, °BTC 20 25 (37 in automatic cruise) - - - -
Spark plugs See Note 7 - - - - - -
NOTES 1,2,3,4,6,7 1,2,3,4,5,6,7 - - - -

E-230 2
Model   Twin Wasp D-3 D-5 D-7 D14
Type     14RA- 2:1 reduction gearing - - 16:9
reduction
gearing
- -
Rating
(With low imp. gear ratio) 7.15:1 - - - - - -
Max. continuous , hp.
rpm, in. Hg., at:
Critical alt. (ft.) 1200-2550-40.5-5200 1200-2550-41.5-7000 - - 1200-2550-40.5-5200
Sea level press. alt. 1200-2550-42.0-S.L. 1200-2550-42.5-S.L. - - 1200-2550-42.0-S.L.
Takeoff (five minutes),
hp, rpm, in. Hg., at:
Critical alt (ft.) 1450-2700-49.5-1000 1450-2700-49.5-3500 - - 1450-2700-49.5-1000
Sea level press. alt. 1450-2700-50.0-S.L. 1450-2700-50.0-S.L. - - 1450-2700-50.0-S.L.
(With high imp. gear ratio)    9.52:1
Max. continuous, hp.
rpm, in. Hg., at:
Critical alt. (ft.)    1100-2550-43.0-15000
Low critical press.
altitude (ft.)    1100-2550-44.0-7000
Fuel (Min. grade aviation gas.) Grade 100/130 - - - - - -
Lubricating oil See P&WA Serv.
Bulletin #1183
- - - - - -
Bore and stroke, in. 5.75 X 5.5 - - - - - -
Displacement, cu. in. 2004 - - - - - -
Compression ratio 6.5:1 - - - - - -
Weight (dry), lbs. (See NOTE 5) 1585 1585 1595 1615
Center of gravity location (dry)
Fwd. of mount pad C.L., in. 10.9 - - - - 10.6
Above prop. shaft C.L., in. .3 - - - - - -
Propeller shaft, SAE No. 50 - - - - - -
Carburetion Stromberg PD-12F8 or
F13
- - - - - -
Ignition, dual Scintilla high or low
tension
- - - - - -
Ignition timing, °BTC 25 (37 in automatic
cruise)
- - - - - -
Spark plugs See Note 7 - - - - - -
NOTES 1,2,3,4,5,6,7 - - - - - -
"- -" indicates "same as preceding model".
"" indicates "does not apply".
Certification basis Type Certificate No. 230
Production basis Production Certificate No. 2
NOTE 1. Maximum permissible temperature are as follows:
Cylinder Head Cylinder Barrel Oil Inlet
500°F spark plug gasket 350°F 200°F
475°F well-type
NOTE 2. Fuel and Oil Pressure limits:
Maximum
Fuel pressure (psi) 16 14 with 5 lb. discharge nozzle spring
23 21 with 10 lb. discharge nozzle spring
Oil pressure (psi) 100 50

3 E-230
NOTE 3. The following accessory provisions are available:
Direction Speed Ratio Maximum
of of Maximum Torque Overhang
Drive* Drive** Driving Static Moment (in. lb.)
Starter (2SD-G only) C 1:1 2100 24600 220
C 1:1 3100 16500 220
Generator (2SD-G only) C 3:1 300 1700 260
C 3:1 500 2000 260
Fuel Pump (2 on 2SD-G, 1 on 2SD1-G, 2SD13-G,
D-4, D-3, D5, D7, D14)
CC .875:1 150 450 10
Vacuum pump (rear location) C 1.4:1 150 2250 40
(side location) C 1:1 90 800 20
Hydraulic pump C 1.4:1 400 2250 70
Propeller governor C .958:1 100 600 
*"C" is clockwise viewing pad.   "CC" is counter clockwise viewing pad.
** Speed ratio is based on crankshaft speed.
NOTE 4. These engine models differ essentially as follows:
Model
2SD-G Basic model.
2SD1-G Similar to 2SD-G except has plain type main bearings, revised diffuser, impeller, ignition harness,
cams, exhaust valves and guides plus the above listed differences.
2SD13-G Similar to 2SD1-G except has aluminum finned cylinder barrels, plus the above listed differences.
D14 Similar to 2SD13-G except has 16:9 reduction gearing and an integral torquemeter.
D3 Same as 2SD13G except has a single speed supercharger drive.
D4 Same as 2SD1-G except has a single speed supercharger drive.
D5 Similar to 2SD13-G except has a single speed supercharger drive with supercharger impeller and
diffuser identical to those in the 2SD-G plus the difference listed above.
D7 Similar to D14 except has a single speed supercharger drive with impeller and diffuser identical to
those in the D5.
NOTE 5. The following ignition systems are eligible in the pertinent engine models:
High tension type 2 Scintilla SFLN-8 magnetos with integral distributors, high tension harness and spark plug
leads.
All Twin Wasp are eligible using SFRN-8 magnetos and the appropriate reversed direction gear
train which eliminates the two-position spark advance.  Such engines are designated by the
letter "S" following the engine serial number.
Low tension type 2 Scintilla high frequency type L-8992 magnetos, L-8998 harness and leads with BG-712HF
transformer spark plugs.  Requires two 1/2 speed magneto drives.
Engine weight is reduced 24 lbs.
NOTE 6. Twin Wasp D series engines are eligible for operation on Grade 91 fuel provided the following reduced ratings are
not exceeded.  High ratio supercharger drives, when available, should not be used with Grade 91 fuel.
Takeoff 1100 hp at 2700 rpm.
Maximum continuous 1000 hp at 2550 rpm.
NOTE 7. The following spark plugs are approved for use on these engines:
AC 161, 171, 181, 261, 271, 281.
BG 240, 245, 340, 341, 345, 346, RB19R-2, RB21R-1, RB23R, RB27R, RB27R-1, RB39R.
Champion C34S, C35S, RC34S, RC35S, R37S-1, REA37N, REB37N, RHA37N, RHB37N, RHA37E,
RHB37E, R115.
Lodge RS19-2R
Hahn 702.
Autolite SL30, SL300
.....END.....
```

## ADs (1, in force first)

- [AD 56-06-02](https://openairdocs.org/ad/56-06-02): Cylinder Flange Attaching Stud · Pratt & Whitney Division Double Wasp CA15, Double Wasp CA17, Double Wasp CA18 and 115 more

## STCs approved under this data sheet (5)

- [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 SE873SW](https://openairdocs.org/stc/SE873SW): Modification of Pratt and Whitney R2800-B Series cylinder heads to the R2000-2SD-13G configuration. Continental Motors, Inc.
- [STC SE01203WI](https://openairdocs.org/stc/SE01203WI): Installation of R-1830-94 supercharger impeller and diffuser in place of existing hardware.. Dempsay William A.
- [STC SE01208WI](https://openairdocs.org/stc/SE01208WI): Installation of R-1830-94 supercharger impeller and diffuser in place of existing hardware.. Dempsay William A.
- [STC SE1-344](https://openairdocs.org/stc/SE1-344): Redesigned propeller shaft oil transfer pipe seals.. Airwork Corporation

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