Crosley/Mooney Air-Craft Engine Specification

This is actually the second specification for the Crosley engine used in the M-18. The first, dated August 17, 1948 differs only  in that there is no reference to the CC46M-2A engine, and therefore has no  Note 5.

DEPARTMENT OF COMMERCE
CIVIL AERONAUTICS ADMINISTRATION
WASHINGTON
E-255-2
MOONEY
CC46M-2
CC46M-2A

October 7, 1948

AIRCRAFT ENGINE SPECIFICATION
Engines of models described herein conforming with this specification and approved data on file with the Civil Aeronautics Administration are rated as airworthy for use in certificated aircraft in accordance with pertinent aircraft specifications.
Manufacturer
 Mooney Aircraft, Inc.
6301 E. Harry
Airport Post Office
Wichita, Kansas
Model
 CC46M-2
Type
Reduction ratio (belt drive)
Ratings
     Maximum continuous, BHP-RPM-Sea Level
     Take-off, BHP-RPM
Fuel (minimum octane aviation)
Bore and stroke, inches
Displacement, cubic inches
Compression ratio
Weight (dry), lbs. (includes generator)
C.G. location
     Fwd. of left rear mount, inches
     Above left rear mount, inches
Propeller shaft

Carburetion
Ignition, Dual (battery)


Ignition timing, °BTC
Spark plugs

Oil sump capacity, qts.
Coolant capacity (engine only), qts.
Coolant

NOTES

Certification basis
Production basis
 4LW
.500:1

25-3900-S.L.
25-3900
80
2.5 x 2.25
44
8.2:1
101

7.7
3.7
Integral flanged hub
Six 3/8 bolts, 4 inch circle
Tillotson DY-9B carburetor (Mooney No. E-251)
Delco-Remy X-20010 distribution (Mooney No. E-273)
Delco-Remy 1115378 ignition coil (     "           "    E-388)
Auto-lite GAS-4190 generator       (     "           "    E-338)
Left 6, Right 8, below 1200 RPM
Left, Champion J10
Right, Champion Y4A
2 1/4
1.8
40% min. AN-E-2C, Prestone, or Zerex,  remainder water

A, 1, 2, 3, 4

Type Certificate No. 255
None (See NOTE A)
NOTE A. The manufacturer does not hold the production certificate for the production of engines under this type cerificate and, therefore, each engine so produced is subject to a detailed inspection for workmanship and conformity with the approved data be a Civil Aeronautics Administration Inspector. In addition, the engine must have a satisfactory run-in including 5 hours at rated power and speed. Upon satisfactory completion of the above, the inspector will tag the engine with Tag Form 186.
NOTE 1. Maximum permissible temperatures:


 Cylinder head (at plug) 500°F

Coolant outlet 190°F

Oil inlet 200°F


NOTE 2. Pressure limits for normal operation:
                                                                      


Min. Max.

Oil inlet, psi 40
 55

Fuel inlet to carb., psi 2
 2.5

Coolant inlet, psi *
 7

          * Coolant flow 10 gal./min. minimum at 3900 engine RPM
NOTE 3. The following accessories are eligible at the indicated additional weight:

                                                                   Weight, lbs
          AC No. 1538923 fuel pump              
               (Mooney part No. E-272)                  2
NOTE 4. A shield must be provided for the propeller shaft driving belts to prevent their contact with water, other liquids and foreign substances of all kinds.
NOTE 5. Model CC46M-2A differs from model -2 in that numerous changes in detail design have been incorporated in the cylinder block, and other parts.  The external changes include relocation of oil filter, breather, fuel pump and left spark plug boss.


(signed by) Charles F. Dycer
Director, Aircraft Service