# TCDS E-143: Pratt & Whitney Division

- Type: Type certificate data sheet
- Status: Current
- Holder: Pratt & Whitney Division
- Revision: 4
- Revised: August 7, 1973
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/e9/f0/e9f0e204796afffd90cf1445949edb7b7f635055b6cd6123cd2cbba3ab98bc6b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8690E2DD941DE2E08525670D005F9CCE.0001
- Page: https://openairdocs.org/tcds/E-143

## Models (1)

As the data sheet lists them.

- Wasp S3H1

## 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
Rev. No. 4 4
FEDERAL AVIATION AGENCY
E-143
Revision 4
Pratt & Whitney
WASP S3H1
August 7, 1973
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 Pratt & Whitney Aircraft
Division of United Aircraft Corporation
East Hartford, Connecticut
Model Wasp S3H1
Type 9RA  -  Direct drive
Rating (Impeller gear ratio) 10:1
Maximum continuous, hp., rpm, in.Hg., at:
Critical altitude (ft.) 550-2200-32.5-5000
Sea level pressure altitude (ft.) 550-2200-34.0-S.L.
Takeoff (5 minutes), hp., rpm, in.Hg., at:
Critical altitude (ft.) 600-2250-35.5-3000
Sea level pressure altitude (ft.) 600-2250-36.0-S.L.  (See Note 5)
Fuel (minimum grade aviation gasoline) 80/87
Lubricating oil See P&WA Service Bulletin No. 1183
Bore and stroke, in. 5.75  X  5.75
Displacement, cu. in. 1344
Compression ratio 6:1
Weight (dry), lb. 865
Propeller shaft, SAE No. 40
Carburetion Stromberg NA-Y9B, C, H, E1 with 2-3/4 in.
venturis or PD-9D1 with 2-1/2 in. venturis
Ignition, Dual Scintilla SB9R or Bosch SB9RU2 and SB9RU3 magnetos
Timing, °BTC 25
Spark plugs See Note 6
Notes 1, 2, 3, 4, 5, 6
Certification basis Type Certificate No. 143
Production basis Production Certificate No. 2
NOTE 1. Maximum permissible temperatures are as follows:
Cylinder Head Cylinder Barrel Oil Inlet
500°F. 300°F. 200°F.
NOTE 2. Fuel and oil pressure limits:
Fuel pressure (psi)   3-6
Oil pressure (psi) 70-90

E-143 2
NOTE 3. The following accessory drives are provided:
Direction of
Rotation
(Clockwise or
Counter-
Speed Ratio
(Times
Crankshaft
Maximum Torque
(in. lb.)
**Maximum
    Overhang
Clockwise)  Speed) Cont. Static (in.-lb.)
Starter CC 1.0 2300 10,000 180
Generator C 1.5 100 300 183
Generator (opt.) C 2.0 150 900 183
Fuel pump CC 1.0 150 450 10
Aux. accessory CC 1.0 *150 450 10
Tachometer R.H. C   .5 15 45 10
L.H. CC   .5 15 45 10
Goverrnor C 1.144 60 250 -
Vacuum pump C 1.5 *100 300 10
*Maximum combined drive load of vacuum pump and fuel pump must not exceed 150 in.-lb.
**Maximum allowable accessory moments in in.-lb., provided no destructive accessory drive or mounting
pad forces resulting from accessory vibration are present.
Early Wasp engines incorporate tongue and groove vacuum and fuel pump drives.  All later engines have
spline type drives.
NOTE 4. Eligible with automatic power and mixture control when the NA-Y9C carburetor is used at a weight increase
of 12 pounds.
NOTE 5. (a) Ratings are based upon the best power mixture strength and 450°F cylinder head temperature.
(b) With the use of grade 91/96 fuel, the following ratings may be used:
Maximum continuous, hp, rpm, in.Hg., at:
Critical altitude (ft.) 550-2200-33.0-4500
Sea level pressure altitude (ft.) 550-2200-34.0-S.L.
Takeoff (one minute), hp, rpm, in.Hg., at:
Critical altitude (ft.) 600-2250-36.0-2300
Sea level pressure altitude (ft.) 600-2250-36.5-S.L.
NOTE 6. The following spark plugs are approved on this engine:
AC SR-83P, S-86R, HSR-86, HSR-83P
Autolite SH-2K, SH-2M, SH-20
BG 321S, 417S, SS485A, RB485S, 706SR
Champion C27S, ED41N, EM41N, RC26S, RED39N, REM39N, RHD39M, RHM39N
.....END.....
```

## ADs (3, in force first)

- [AD 99-11-02](https://openairdocs.org/ad/99-11-02): Cylinders Inspections · Pratt & Whitney Division Military R-1340 Series, Wasp R-1340-59, Wasp R-1340-61 and 7 more. Effective Jul 19, 1999
- [AD 96-15-02](https://openairdocs.org/ad/96-15-02): Crankshaft counterweight · Pratt & Whitney Division Military R-1340 Series, Wasp S1H1, Wasp S1H1-G and 2 more. Effective Aug 12, 1996
- [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 (10)

- [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
- [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 SE09477SC](https://openairdocs.org/stc/SE09477SC): Installation of a propeller nose oil seal.. A & L Aircraft Parts, Inc
- [STC SE09029SC](https://openairdocs.org/stc/SE09029SC): Install chip detector system on P&W R-1240 series engines.. Air Tractor, Inc
- [STC SE00274NY](https://openairdocs.org/stc/SE00274NY): Installation of a Windsor Gear and Drive replacement crankshaft, P/N WA-270458.. Windsor Gear and Drive Inc
- [STC SE6069NM](https://openairdocs.org/stc/SE6069NM): Removal of inverted flight check valve from Stromberg NA-R9B and NA-Y9E1 series carburetors.. Aero Engines Inc.
- [STC SE5584SW](https://openairdocs.org/stc/SE5584SW): Propeller shaft oil seal.. Page Industries, Inc
- [STC SE41N](https://openairdocs.org/stc/SE41N): Increase in compression ratio to 6.75:1, substitution of 12:1 impeller ratio and other modifications to R-1340 engines, equivalent to S1H2, S3H1 and S3H2(not equipped with reduction gear).. CRMA6, Rue Marceau
- [STC SE741SW](https://openairdocs.org/stc/SE741SW): R-1830 rockershaft assemblies.. Southwest Airmotive Co

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