Here are the 7 propellers which are approved on the PA-12 TC. A-780 The Aeromatic is #2.
Propellers and Propeller Accessories
1. Propeller - Sensenich 74FE44, 74FE54, or any other fixed pitch wood propeller which +11 lbs. (-62)is eligible for the engine power and speed and which meets the following limits
a) With O-235-C or O-235-C1 engine - landplane and skiplane: Static rpm at max. permissible throttle setting:Not over 2300, not under 1900. No additional tolerance permitted. Diameter: Not over 76 inches, not under 72 inches.(b) With O-235-C or O-235-C1 engine - seaplane (see Item 103 for manual revisionand seaplane equipment required with O-235-C1 engine):Static rpm at max. permissible throttle setting:Not over 2400, not under 2350.No additional tolerance permitted.Diameter: Not over 76 in., not under 72 in.
*2. Propeller - Koppers Aeromatic F200/00-74E +21 lbs. (-62)Diameter: Not over 74 inches, not under 72.5 inches.Low pitch setting at 24 inch station: 11°Static rpm limits at max. permissible throttle setting(No additional tolerance permitted)
a) With O-235-C engine - landplane, skiplane and seaplane (Parts List Assembly No. 4292):Not over 2550, not under 2500.(b) With O-235-C1 engine - landplane, skiplane and seaplane (Parts List Assembly No. 4292A dated April 9, 1948):Not over 2750, not under 2650. (See Item 103 for required seaplane equipment)The Airplane Flight Manual must reflect this installation under "Limitations" with respect to assembly parts list number,low pitch settings, diameter and static rpm limits and must include the following statement: "Installation and operation mustbe accomplished in accordance with Kopper's Installation Procedure and Operating Limitations dated May 4, 1948 (Item2(a)), or March 10, 1948, revised September 27, 1948 (Item 2(b))."Under the "Performance" section the following statement must be included:"Performance with (_________) engine and the Kopper's Aeromatic Propeller has been demonstrated to equal or exceedthat shown herein for the O-235-C engine and fixed pitch wood propeller. Performance at altitude may be improved byincreasing the flight rpm in accordance with paragraph D(3) of the approved 'Installation Procedure and OperatingLimitations.' "Paragraph E of the "Installation Procedure and Operating Limitations" should be revised as follows:"Counterweights must be added after landing at a field of elevation 2000 feet or more below that at which thecounterweights were last set. This adjustment is required for optimum performance and to avoid exceeding rated rpm atfull throttle during take-off and climb." This revision to paragraph E will be incorporated in the next revision of"Installation Procedure and Operating Limitations" by the Kopper's Propeller Company.
*3. Propeller - Sensenich, two-position controllable, hubs C-2FM-3, C-2FM-4, +27 lbs. (-62)or C-2FM-5 with PC-276A6 bladesDiameter: Not over 76 inches, not under 74 inches.continuedA-780 Page 4 of 7Propeller and Propeller Accessories, continued *3. Propeller – Sensenich, two-position controllable, hubs C-2FM-3, C-2FM-4, continuedBlade pitch settings at 3/4 radius (28.5 in. station): Low High(a) For landplane and skiplane with O-235-C engine 8½° 13°(b) For landplane and skiplane with O-235-C1 engine 7½° 13°(c) For seaplane with O-235-C1 engine 7° 12° (See Item 103 for required equipment).When this propeller is installed, the Airplane Flight Manual must reflect the installation under "Limitations" withrespect to propeller identification and limits. The "Performance" section must include the following statement:"Performance with the (____________) engine and Sensenich Two-Position Propeller has been demonstrated to equalor exceed that shown herein for the O-235-C engine and fixed pitch wood propeller." For seaplane with O-235-C1engine, the above statement must be amended to include the following statement: "Climb performance shown may be realizedafter the expiration of the one-minute take-off power time limit by operating in high pitch, full throttle only."
*4. Propeller - fixed pitch metal, McCauley 1A110 +29 lbs. (-62)Landplane and skiplane with O-235-C1 engine only.Diameter: Not over 76 inches, not under 74 inches.Static rpm at max. permissible throttle setting:Not over 2400, not under 2150.No additional tolerance permitted.When this propeller is installed, the Airplane Flight Manual must reflect the installation under "Limitations" withrespect to propeller identification and limits. The "Performance" section must include the following statement:"Performance with O-235-C1 engine and McCauley 1A110 propeller has been demonstrated to equal or exceed thatshown herein for the O-235-C engine and fixed pitch wood propeller."
*5. Propeller - controllable, Beech R003 which includes R003-342 adapter, +21 lbs. (-62)R003-100 hub, R003-225-75 blades, manual control, and spinner(Required equipment with this prop.).Landplane and skiplane with O-235-C engine only.Diameter: Not over 75 inches, not under 73.5 inches.Blade setting at 3/4 radius (28.5 in. station): Low High13.5° 18.3°When this propeller is installed, the Airplane Flight Manual must reflect the installation under "Limitations" withrespect to propeller identification and limits. The "Performance" section must include the following statement:“Performance with O-235-C engine and Beech R003 propeller has been demonstrated to equal or exceed that shownherein for the O-235-C engine and fixed pitch wood propeller."
*6. Propeller - fixed pitch metal, McCauley 1C90-LM +21 lbs. (-62)Diameter: Not over 72 inches, not under 70.5 inches.Static rpm at max. permissible throttle setting (No additional tolerance permitted)
a) Landplane and skiplane with O-235-C or O-235-C1 engine -Not over 2500, not under 2100.(b) Seaplane with O-235-C or O-235-C1 engine -(See Item 103 for required equipment with O-235-C1 engine)Not over 2500, not under 2350.When this propeller is installed, the Airplane Flight Manual must reflect the installation under "Limitations" with respectto propeller identification and limits. The "Performance" section must include the following statement: "Performancewith the (____________) engine and McCauley 1C90-LM Propeller has been demonstrated to equal or exceed thatshown herein for the O-235-C engine and fixed pitch wood propeller."*7. Propeller - fixed pitch metal, Sensenich M76AM-2 +24 lbs. (-62)Diameter: Not over 74 inches, not under 72.5 inches.With engines O-235-C engine and O-235-C1 only.Static rpm at max. permissible throttle setting (No additional tolerance permitted)
a) Landplane and skiplane only -,Not over 2425, not under 2150.continuedPage 5 of 7 A-780Propellers and Propeller Accessories, continued
*7. Propeller – fixed pitch metal, Sensenich M76AM-2, continued(b) Seaplane only (See Item 103 for required equipment with O-235-C1) -Not over 2425, not under 2325.When this propeller is installed, the Airplane Flight Manual must be revised to reflect this installation under"Limitations" with respect to propeller identification and limits. The "Performance" section must include the followingstatement: "Performance with the O-235-C (or O-235-C1) engine and Sensenich M76AM-2 propeller has been demonstrated to equal or exceed that shown herein for the O-235-C engine and fixed pitch wood propeller."