# TCDS TC 5E11: Jacobs Aircraft Engine Co.

- Type: Type certificate data sheet
- Status: Current
- Holder: Jacobs Aircraft Engine Co.
- Revision: 0
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/f1/f4/f1f4fd62e53f600e64703b0d5825b6ab35ceefd5a629c4d8bd36df8d7b60932c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9265D2336C0CA0288525676A00635D6D.0001
- Page: https://openairdocs.org/tcds/TC%205E11

## Models (1)

As the data sheet lists them.

- Military R-755-7

## What the data sheet says

This is OCR from the scanned FAA data sheet. OCR can misread letters and numbers.

```text
MCDEIS: Jacobs Military R-755-7
I.C. NUMBER: 5E-11
Model  R-755-7
7RA - Lirect drive
Fating:
Maximum continuous,
no. IEm. at s.I.
Fressure altitude  225-2000-S.L.
Take-off, hp.
at full throttle  225-2000
Fuel  (minimum octane
aviation gasoline)  73
Fore and stroke, in.  5.25 x 5.00
[isplacement, cu. in.  757
compression ratio  5-4:1
height (dry), lts.  512
C_G.  location
Forward of mounting
tosses,  in.  $/16
Belcw Fror. C.l. in.
Fropeller shaft,
SAE No.
Carburetion  Stromterg NA-RA carburetor with 2-1/16 in. venturi
Ignition,  dual  scintilla  VMN7-1F magnetos
Ignition timing,
degrees BIC
Spark Flugs  Champion M-26, C-26, C-27
NOTES  1, 2, 3,  4, 5
NOTE 1.  Maximum permissible cylinder head, barrel and oil inlet temperatures, 535 degrees F., 325 degrees F., and
200 degrees F.. respectively.
NOTE 2. Desired fuel pressure 1-1/2 psi. oil pressure limits 60 psi minimum, 80 psi desired and 90 psi m ximum.
Optional accessories:
Starter - Pad and 10004, Type 1, clockwise rotation facing the fad, speed ratio 1.75 times crarkshaft.
Generator - Pad and 10002, clockwise rotation facing the pad, speed ratio 1.75 times crarkshaft.
Fuel fump - Pad and 10003, clockwise rotation facing the pad, speed ratio one times crarkshaft.
Tachometer - Iwo mechanical tachometer drives are provided with counter-clockwise rotation at one half
NOTE 4-  Prior to original installation in a certificated aircraft, ascertain that rear main crankcase par: No.
30068 is incorporated.  Inspect all gears and busnings in the starter gear train to determine that they
are in satisfactory condition.  Eclipse starter, type 946 should not be used on this engine model due to
its inherently high clutch torque setting.  Inertia starters with clutch settings higher than 300 ft.-1bs.
should not be used on this engine.
similar to the R-755-9 engine which is approved under the 1-4  It the 955 engine which is appaster inder the fou series, eye certificate. 121.  HOweVe I,
the crankcase and rear case are totally different.
```

## ADs

None name its models.

## 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

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