TCDS P-785

Page No. 1 2 3 Rev. No. 8 8 8 DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION P-785 Revision 8 Hamilton Standard 24E December 4, 1970 TYPE CERTIFICATE DATA SHEET NO. P-785 Propellers of models described herein conforming with this data sheet (which is part of type certificate no. 785) and other approved data on file with the Federal Aviation Administration meet the minimum standards for use in certificated aircraft in accordance with pertinent aircraft data sheets and applicable portions of the Civil Air Regulations/Federal Aviation Regulations provided they are installed, operated, and maintained as prescribed by the approved manufacturer's manuals and other approved instructions. Type Certificate Holder Hamilton Standard Division United Aircraft Corporation Windsor Locks, Connecticut 06096 Type Constant speed; hydraulic (see NOTES 3 and 4) Engine shaft SAE No. 60, SAE No. 50 or X (X indicates special shaft sizes for foreign engines are eligible.) Hub material Steel Blade material Aluminum alloy Number of blades 4 Hubs eligible 24E60, 24E50 and 24EX (see NOTE 1) Blade Eligible Maximum Continuous Takeoff Diameter Limits Hub and Blade Weight (See Note 2) HP RPM HP RPM (See Note 2) (Max Diameter) NOTES 6353-18 to 6353-24 1625 1435 2000 1520 11' 7-7/8"- 11' 1-7/8" 562 lbs. (-18 to -24) 6354 is the left-hand version of 6353. 5 6491-12 to 6491-30 2550 1020 3000 1080 14' 1-7/8" - 12' 7-7/8" 682 lbs. (-12 to -30) 6492 is the left-hand version of 6491. 5 6501-0 to 6501-24 1625 1275 2000 1350 13' 1-7/8"- 11' 1-7/8" 657 lbs. 6 (-0 to -36) 6502 is the left-hand version of 6501. 5 6507-0 to 6507-24 1625 1275 2000 1350 13' 1-7/8" - 11' 1-7/8" 657 lbs. (-0 to -24) 6508 is the left-hand version of 6507. 5 6855-6 to 6855-18 1800 1170 2300 1260 13' 1-7/8"- 12' 1-7/8" 687 lbs. (-6 to -18) 6881-6 to 6881-18 1800 1170 2300 1260 13' 1-7/8" - 12' 1-7/8" 687 lbs. (-6 to -18) 7037-50 to 7037-56 1900 1170 2500 1260 10' 11-7/8"- 10' 5-7/8" 692 lbs. (-50 to -56) 7038 is the left-hand version of 7037. 5 6801-12 to 6801-30 2550 1020 3000 1080 14' 1-7/8" - 12' 7-7/8" 690 lbs. (-12 to -30) 6802 is the left-hand version of 6801. 5 P-785 Page 2 Certification basis CAR 14 as amended to November 15, 1940 Type Certificate No. 785 issued March 12, 1942. Date of Application for Type Certificate December 31, 1941. Production basis Production Certificate No. 14 NOTE 1. Hub Model Designation See * below. SAE propeller shaft size Blade shank size Number of blades 4 E 60 300- Major model type 2 *A dash number added to the propeller designation indicates minor changes which do not affect eligibility. If number is above 300 it also indicates the complete blade assembly and all of the rotating deicing system components. NOTE 2. Blade Model Designation If used, indicates telescoped; "S," square cutoff Nominal reduction from basic diameter in inches Operational features (may indicate particular deicing assembly), does not affect eligibility. Aerodynamic and structural features If used, indicates shank fairing design. A 6353 C 18 T- - The blade model designation suffixed with "T" indicates a diameter reduction by telescoping. Blade models with square cutoffs in accordance with Hamilton Standard blade drawings are suffixed with "S" except the following blades use square cutoffs not designated by "S" - Blade models 7037. Telescoped blades and blades with a square cutoff are eligible at the same ratings and diameter limits as blades with standard cutoff. Diameter limits shown are nominal diameters of the assembled propeller and do not include the ± 1/8 inch manufacturing tolerance permissible for propellers with basic diameter less than 14 feet or ± 1/4 inch permissible for propellers with basic diameter 14 feet or larger. NOTE 3. Pitch Control. Eligible with Hamilton Standard constant speed governor only. NOTE 4. Feathering. Eligible with full feathering control installed in accordance with the propeller manufacturer's instructions. NOTE 5. Left-Hand Models. The left-hand version of an approved model propeller is eligible at the same rating and diameter limitations as listed for the right-hand model. Page 3 P-785 NOTE 6. Interchangeable Blades. Blades with an "S" or "T" suffix (see NOTE 2) are not interchangeable aerodynamically or vibrationwise with each other or with blades having normal round cutoffs. Only blades listed in the same group of the following groups are aerodynamically similar. Only blades listed under the same type in any one group are structurally similar. A higher type number implies a higher strength. This is due to differences in alloys and in cold working of the blade surface. Type 1 includes standard alloy non-surface treated blades; Type 2, hard alloy non-surface treated blades; Type 3, hard alloy blades with cold worked shanks; Type 4, hard alloy blades with cold worked shanks and shot peened surfaces. The following defines the degree to which these blades may be used interchangeably in the same diameter without a flight performance test and without a vibration survey: Type 2 blades may replace Type 1 blades in the same group, but not vice-versa. Type 3 blades may replace either Type 1 or Type 2 blades in the same group, but not vice versa. Type 4 blades may replace either Type 1, Type 2, or Type 3 blades in the same group, but not vice-versa. NOTE 7. Accessories. (a) Propeller Deicing. Eligible with Hamilton Standard deicing slinger ring assemblies only. (b) Propeller Spinner. Eligible with spinner supplied by Hamilton Standard. NOTE 8. Shank Fairings. Not applicable. NOTE 9. Special Limits. Not applicable. NOTE 10. Special Notes. The word "eligible" as used herein does not signify approval. For approval, compliance with the applicable aircraft airworthiness requirements is necessary. ....END....