# TCDS TC 194: Franklin Engine Company

- Type: Type certificate data sheet
- Status: Current
- Holder: Franklin Engine Company
- Revision: 0
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/55/7a/557ab2b2c669ef7c9b0d7ea2bf0aaeb03ce6fcaf4d83a870cf668c92a111c17e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AFD0A02C68DE36928525670C0056039C.0001
- Page: https://openairdocs.org/tcds/TC%20194

## Models (1)

As the data sheet lists them.

- 4AC-150

## What the data sheet says

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

```text
FRANKLIN ENGINE COMPANY
MODELS:  Aircooled Motors Franklin 4AC-150 Series 40, 50 and A
T.C. NUMBER:  ATC 194
Models -
   Franklin 4AC-150 Series 40 Series 50 Series A
Type 4HOA - - - - - - - -
Rating:
   Maximum continuous,
   hp, rpm, at S.L.
   press. alt. 40-1875-S.L. 50-2300-S.L. 60-2400-S.L.
   Take-off, hp, rpm,
   full throttle 40-1875 50-2300 60-2400
Fuel (minimum octane
   aviation gasoline) 70 - - - - - - - -
Bore and stroke, in. 3.625 x 3.625 - - - - - - - -
Displacement, cu. in. 150 - - - - - - - -
Compression ratio 6.6: 1 - - - - - - - -
Weight (dry), lbs. 158 single, with Wico
   or Eisemann magneto;
   151 single, with
Bendix
   magneto
158 single, 166 dual
   with Wico or
   Eisemann magnetos;
   161 single, 172 dual
   with Bendix magnetos
158 single, 166 dual
   with Eisemann
   magnetos 160 single,
   172 dual with Bendix
   magnetos
Propeller shaft Special with integral
   hub
- - - - - - - -
Carburetion Single, Bendix-Scintilla
   SF-4R-1, SF-4R-9,
   SF-4L-1, SF-4L-9,
   Wico A8-9B3, or
   Eisemann magnetos
Single and dual -
   Bendix-Scintilla SF-
   4R-1, SF-4R-9, SF-
   4L-1, SF-4L-9, Wico
   AP-958, or Eisemann
   magnetos
Single and dual, Bendix
   Scintilla SF-4R-1, SF-
   4R-9, SF-4L-1, SF-
   4L-9, or Eisemann
   magnetos
Ignition Stromberg NA-S2
   carburetor with 1-1/16
   in. venturi
Stromberg NA-S2
   carburetor with 1-1/8
   in. venturi or Marvel
   MA-3-F carburetor
   with 1-9/64 in. main
   venturi and 11/16 in.
   primary venturi
Stromberg NA-S3
   carburetor with 1-1/4
   in. venturi or Marvel
   MA-3-F carburetor
   with 1-7/32 in. main
   venturi and 11/16 in.
   primary venturi
Ignition timing,
   deg. BTC Single 30 Single 30, Dual 25 and
   26
Single 30, Dual 24 and
   26
Spark plugs Champion AJ-66, C-
   108, Simmonds
   Benton 4DS-8
- - - - - - - -
Certification basis Approved Type Certificate No. 194  (Expired
   7/11/41)
- - - -
NOTE 1.    Maximum permissible cylinder head, cylinder barrel, and oil inlet temperature, 500 degrees
   F., 300 degrees F., and 220 degrees F., respectively.
NOTE 2.    All models eligible incorporating Fram Type P-1/2 oil filter.
```

## ADs (1, in force first)

- [AD 69-09-01](https://openairdocs.org/ad/69-09-01): Eisemann Magnetos · Eisemann Magnetos, 2A4-45-B2, 2A4-49-B2 and 158 more

## STCs approved under this data sheet (1)

- [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

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.