Year

Fan Blades

Fan Diameter

Drive

1955

 

 

 

1956 B

4

18

Solid

1956 B with AC

6

18

Solid

1957 C

6

18

Non-thermal

1957 C with AC

6

18

Non-thermal

1958 D

6

18

Solid

1958 D with AC

5

18

Non-thermal

1959 E

6

18

Solid

1959 E with AC

5

18

Non-thermal

1960 F

4

18

Solid

1960 F with AC

7

18

Non-thermal

1961 G

4

18

Solid

1961 G with AC

7

18

Non-thermal

1962 K

7

18

Non-thermal

1962 K with AC

7

18

Non-thermal

1963 J

7

18

Non-thermal

1963 J with AC

7

18

Non-thermal

1964 K (*)

4

18

Solid

1964 K with AC

7

18

Non-thermal

1965 L

4

18

Solid

1965 L with AC

7

18 or 18.5

Thermal

1966

4

18

Solid

1966 with AC

7

18 or 18.5

Thermal

(*) All ram Ks used the 7 blade 18 non-thermal.

 

Data from factory service manuals.