Bird-Johnson fixed pitch propellers

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Bird-Johnson

fixed pitch propellers

...leading the field of marine propeller technology

for more than forty years

Rolls-Royce Naval Marine, Inc.

3719 Industrial Road

Pascagoula, Mississippi 39568 USA Telephone: (800) 237-7353 Fax: (228) 769-7048 www.rolls-royce.com

Rolls-Royce Naval Marine, Inc.

110 Norfolk Street

Walpole, Massachusetts 02081-1798 USA Telephone: (508) 668-9610

Fax: (508) 668-2497 www.rolls-royce.com

®

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Rolls-Royce, a leader in the field of marine propeller technology,

located in Walpole, Massachusetts and Pascagoula, Mississippi, supplies

Bird-Johnson controllable and fixed pitch propeller systems for naval

and commercial ships operating around the world.

®

© Rolls-Royce Naval Marine Inc. The information contained in this document is the property of Rolls-Royce Naval Marine Inc., its indirect parent company plc, or any other company in the Rolls-Royce group of companies, and may not be copied or communicated to a third party for any purpose other than for which it is supplied with-out the express written authority of Rolls-Royce Naval Marine, Inc. While this information is given in good faith, based upon the latest information available to Rolls-Royce Naval Marine, Inc., its indirect parent company Rolls-Royce plc, or any other company in the Rolls-Royce group of companies, no warranty or representation is given concerning such information, which must not be taken as establishing any contractual or other commitment binding upon Rolls-Royce Naval Marine Inc., its indirect parent company Rolls-Royce plc, or any other company in the Rolls-Royce group of companies.

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...Bird-Johnson propellers setting the standard.

In 1986 we acquired an industrial facility in Pascagoula, Mississippi, and turned it into the most fully equipped state of the art ship propeller manufacturing center in the United States. Here, Rolls-Royce produces a broad line of Bird-Johnson fixed pitch propellers in diameters from 40 inches to 33 feet. This extensive product offering is backed by the industry’s largest inventory of patterns and a captive foundry dedicated solely to the manufacture of marine propellers.

Our engineering team includes many well known naval architects and marine engineers as well as world class hydrodynamicists. This combination of experience and expertise gives us an exclusive technical advantage when it comes to evaluating the use of stock or custom-designed propellers for any application. Only then, through the special skills of our foundry men, machinists and propeller technicians, do these engineered solutions evolve into high quality marine propellers worthy to carry the Bird-Johnson product name.

Commitment, capability and capacity are the driving forces behind Rolls-Royce. Experience true quality. Experience Rolls-Royce.

The 62,000 sq. ft. Pascagoula facility is dedicated to the manufacture of marine propellers.

AOE 6 Class 23.5’ diameter, 6-blade, highly skewed, 80,000 pound nickel-aluminum-bronze propeller loaded for over-the-road transport.

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The combination of

experience and expertise

gives Rolls-Royce an

exclusive technical

advantage.

3/4” .624 .626 2” 3/16” 3/32” 1/2” 13” 7/8” .726 .728 2-3/8” 1/4” 1/8” 5/8” 11” 1” .827 .829 2-3/4” 1/4” 1/8” 3/4” 10” 1-1/8” .929 .931 3-1/8” 1/4” 1/8” 3/4” 10” 1-1/4” 1.030 1.032 3-1/2” 5/16” 5/32” 7/8” 9” 1-3/8” 1.132 1.134 3-7/8” 5/16” 5/32” 1” 8” 1-1/2” 1.233 1.235 4-1/4” 3/8” 3/16” 1-1/8” 7” 1-3/4” 1.437 1.439 5” 7/16” 7/32” 1-1/4” 7” 2” 1.640 1.642 5-3/4” 1/2” 1/4” 1-1/2” 6” 2-1/4” 1.843 1.845 6-1/2” 9/16” 9/32” 1-3/4” 5” 2-1/2” 2.046 2.048 7-1/4” 5/8” 5/16” 1-3/4” 5” 2-3/4” 2.257 2.259 7-7/8” 5/8” 5/16” 2” 4-1/2” 3” 2.460 2.462 8-5/8” 3/4” 5/16” 2-1/4” 4-1/2” 3-1/4” 2.663 2.665 9-3/8” 3/4” 5/16” 2-1/2” 4” 3-1/2” 2.866 2.868 10-1/8” 7/8” 5/16” 2-1/2” 4” 3-3/4” 3.069 3.071 10-7/8” 7/8” 5/16” 2-3/4” 4” 4” 3.272 3.274 11-5/8” 1” 5/16” 3” 4” 4-1/2” 3.827 3.829 10-3/4” 1-1/8” 3/8” 3-1/4” 4” 5” 4.249 4.251 12” 1-1/4” 7/16” 3-3/4” 4” 5-1/2” 4.671 4.673 13-1/4” 1-1/4” 7/16” 4” 4” 6” 4.791 4.793 14-1/2” 1-3/8” 1/2” 4-1/4” 4” 6-1/2” 5.187 5.189 15-3/4” 1-3/8” 1/2” 4-1/2” 4” 7” 5.582 5.584 17” 1-1/2” 9/16” 5” 4” 7-1/2” 5.978 5.980 18-1/4” 1-1/2” 9/16” 5-1/2” 4” 8” 6.374 6.376 19-1/2” 1-3/4” 9/16” 5-3/4” 4”

nominal dia. small end(B) taper nominal keyway(D) thread shaft dia.(A) min. max. length(C) width depth dia. T.P.I.

*Recommended minimum hub diameter for stainless steel propellers.

3/4” .608 .610 2-1/4” 3/16” 3/32” 1-3/8” 7/8” .710 .712 2-5/8” 1/4” 1/8” 1-9/16” 1” .812 .814 3” 1/4” 1/8” 1-13/16” 1-1/8” .913 .915 3-3/8” 1/4” 1/8” 2” 1-1/4” 1.015 1.017 3-3/4” 5/16” 5/32” 2-1/4” 1-3/8” 1.116 1.118 4-1/8” 5/16” 5/32” 2-1/2” 1-1/2” 1.218 1.220 4-1/2” 3/8” 3/16” 2-11/16” 1-3/4” 1.421 1.423 5-1/4” 7/16” 7/32” 3-1/8” 2” 1.624 1.626 6” 1/2” 1/4” 3-9/16” 2-1/4” 1.827 1.829 6-3/4” 9/16” 9/32” 4” 2-1/2” 2.303 2.032 7-1/2” 5/8” 5/16” 4-7/16” 2-3/4” 2.233 2.235 8-1/4” 5/8” 5/16” 4-7/8” 3” 2.437 2.439 9” 3/4” 5/16” 5-5/16” 3-1/4” 2.640 2.642 9-3/4” 3/4” 5/16” 5-3/4” 3-1/2” 2.843 2.845 10-1/2” 7/8” 5/16” 6-3/16” 3-3/4” 3.046 3.048 11-1/4” 7/8” 5/16” 6-5/8” 4” 3.249 3.251 12” 1” 5/16” 7-1/16” 4-1/2” 3.796 3.798 11-1/4” 1-1/8” 3/8” 8” 5” 4.218 4.220 12-1/2” 1-1/4” 7/16” 8-7/8” 5-1/2” 4.640 4.642 13-3/4” 1-1/4” 7/16” 9-3/4” 6” 4.749 4.751 15” 1-3/8” 1/2” 10-5/8” 6-1/2” 5.145 5.147 16-1/4” 1-3/8” 1/2” 11-1/2” 7” 5.541 5.543 17-1/2” 1-1/2” 9/16” 12-3/8” 7-1/2” 5.937 5.939 18-3/4” 1-1/2” 9/16” 13-1/4” 8” 6.332 6.334 20” 1-3/4” 9/16” 14-1/4”

standard dia. small end(A) hub nominal keyway(D) min. hub* taper min. max. length(B) width (C) depth (D) diameter

SAE standard tapers

Propeller hub

Tail shaft

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(C) (A) (D) (B) (E) (B) (D) (A) (C) (E)

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...quality propellers begin with quality castings.

Engineering and development

Rolls-Royce has more expertise, more experience and more comprehensive resources than anyone else in the industry. Fixed pitch propeller analysis and sizing is handled by our quali-fied staff of accomplished marine engineers and naval architects educated in the proper application of both stock and custom-designed propellers.

If you want our recommendation on what kind of propeller is best for your kind of work, Rolls-Royce will provide such information as a shared technical resource available at all levels of product application.

We are dedicated to exploring new technologies through cooperative programs with naval research and development centers as well as other leading testing facilities throughout the world. We are involved with comprehensive computer-aided engineering (CAE) analysis and utilize these techniques to accurately predict strength and loading. Other recent activities include investigations in:

• Nonmetallic composite components for improved weight reduction

• Improved materials for longer life and easier maintainability • Improved welding techniques

• Greater hydrodynamic efficiency

At Rolls-Royce your particular application is engineered before the propeller is fitted to the shaft.

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The success in producing Bird-Johnson fixed pitch propellers results directly from our precise control of the ever-so-critical foundry process. Such is the integrity of casting operations, right here in our own Pascagoula facility, we are able to offer extended service life, ease of repair and a product that lives up to those promises.

Thanks to the assistance of leading foundry experts, such as Massachusetts Institute of Technology (MIT), we have consistently advanced our capability in casting technology to provide the best bronze and stainless steel castings available. Moreover, our stringent foundry process control combined with our comprehensive quality assurance program ensure optimum quality in every casting.

Five electric induction and three reverbatory furnaces provide pouring capacity in excess of 195,000 pounds. Bird-Johnson propellers are manufactured in a variety of materials to meet diverse customer needs. Standard alloys include:

• manganese bronze • nickel-aluminum-bronze • stainless steel

Pouring capacity in excess of

195,000 pounds.

AOJ 21’ diameter, five blade, nickel-aluminum-bronze pro-peller in process; 76,000 pound finished weight.

Metal properties

Manganese bronze

Manganese bronze propellers are the most inexpensive to manufacture. Easy to finish, manganese bronze has long been the tradi-tional bronze propeller alloy.

Nickel-aluminum-bronze

The high tensile strength of nickel-alu-minum-bronze allows the manufacturer to produce propellers with many built-in design features such as thinner blade sec-tions. The advantage of a thinner blade is less hydrodynamic drag which greatly improves a vessel’s operating efficiency. Nickel-aluminum-bronze is the metal of choice for US Naval Vessels.

Stainless steel

Propellers manufactured in our ASTM Grade CF-3 Austenitic Stainless Steel benefit from superior strength and damage resistance inherent in this extra low carbon stainless steel.

tensile/yield PSI 65,000/25,000 85,000/35,000 70,000/30,000

abrasion resistance fair good excellent

corrosion resistance fair good excellent

ductility (elongation) 20% 15% 35%

repairability good good excellent

manganese bronze nickel-aluminum-bronze stainless steel

Classification

society/standards

Bird-Johnson Company manufactures pro-pellers to any required ISO tolerance level, and to the strict requirements of ABS, Lloyds, Veritas and other classification society requirements.

Repairs

26’, 5 blade, 107,000 pound manganese bronze propeller undergoing tip replacement

Both the Gulf coast and Seattle operation offer full service repair capabilities. Qualified Service technicians perform straightening, repitching and certified welding. These services are available on a 24-hour emergency basis. Traveling teams are also at the ready to perform in-situ repair.

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New Generation Workwheels

® In order to optimize the performance of workboat wheels, in both open and ducted versions, Rolls-Royce has developed the New Generation Workwheel series. Designed to outperform conven-tional 3- and 4-blade standard series pro-pellers, New Generation Workwheels apply state of the art technology routinely used in the design of large, com-mercial and military propellers.

The improved hydrodynamic performance of the New Generation Workwheel results from state of the art hydrodynamic design codes which are applied in both design and off design operating conditions.

The use of 5 blades not only reduces propeller-induced vibration levels, but also increases the thickness/chord ratio of the blade section. This makes the blade sections much less sensitive to cavitation when operating in uniform inflow common to workboats. The given non-linear skew distribution provides the hydrodynamic equivalent of 36 degrees of non-linear skew while maintaining the structural strength of an unskewed propeller. This feature, combined with the 5 blades, assures a propeller which reduces vibration levels approximately 50% below traditional workboat designs.

The customized new technology blade sections significantly improve cavitation performance and reduce blade area which contributes to improved propeller efficiency. In addition, the new blade sections incorporate a flat pressure face for ease of manufacture and repair. Sophisticated structural finite element analysis and generous blade edge thicknesses insure structural integrity of the new blade design. The end product is a propeller that delivers opti-mum cavitation and vibration performance while maintaining the structural and maneuver-ing characteristics of a standard series workwheel.

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Reduces vibration levels

approximately 50% below

traditional workboat designs.

New Generation Workwheel

features:

• 5 blades

• 0.60 blade area ratio (approx.) • Optimized variable pitch

distribution

• Non-linear blade skew of 18 degrees

• Advanced new technology blade sections

Kaplan type

The Kaplan propeller is designed for installa-tion in a nozzle on vessels engaged in trawl-ing or towtrawl-ing operations. A Kaplan nozzle system offers fishing boat and work boat owners maximum economy and efficiency with considerable fuel savings and increased bollard pull of up to 40%. Because of the increased performance char-acteristics of a Kaplan nozzle system, these propellers must be custom sized in accor-dance with the vessel’s design and power specifications. The Kaplan is available in

three, four and five blade configurations. 40 3.75 284 691 327 880

42 3.75 308 762 357 970 44 3.75 334 836 390 1064 46 4 390 914 456 1163 48 4 422 995 495 1267 50 4.5 481 1080 563 1374 52 4.5 521 1168 614 1487 54 4.5 560 1260 665 1603 56 5 664 1355 780 1724 58 5 714 1453 843 1849 60 5 763 1555 906 1979 62 6 975 1660 1132 2113 64 6 1036 1769 1210 2252 66 6 1095 1882 1286 2395 68 7 1378 1997 1585 2542 70 7 1451 2117 1678 2694 72 7 1522 2239 1768 2850 74 7 1596 2365 1863 3011 76 7 1683 2495 1973 3176 78 7 1766 2628 2079 3345 80 7.5 1988 2765 2325 3519 82 7.5 2089 2905 2453 3697 84 7.5 2185 3048 2576 3879 86 7.5 2286 3195 2704 4066 88 7.5 2402 3345 2852 4257 90 8 2666 3499 3146 4453 92 8 2782 3656 3293 4653 94 8 2914 3817 3462 4858 96 8 3040 3981 3623 5067 98 8.5 3386 4149 4015 5280 100 8.5 3533 4320 4202 5498 102 8.5 3820 4494 4391 5720 104 8.75 3930 4672 4682 5946 106 8.75 4095 4854 4886 6177 108 9 4361 5038 5204 6413 110 9 4534 5227 5424 6652 112 9 4713 5419 5652 6896 114 9.5 5114 5614 6103 7145 116 9.5 5312 5813 6348 7398 118 10 5749 6015 6491 7655 120 10 5955 6220 7109 7917 diameter inches max bore inches 5 blades D.A.R. 1.03 Lbs. blade area/sq. In. 4 blades

D.A.R. 0.82 Lbs. blade area/sq. In.

Propeller style

Counterbore, gland/seal optional Puller holes standard

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Above weights are based on estimates. For weight-critical projects, consult factory. Anti-singing chiseled edges are applied as standard on all five blade propellers and offered as an option on three and four blade designs.

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Typical Workboat Application

Workwheel Standard series New Generation Workwheels provide the

following benefits to the workboat operator: • Close to 50% reduction in ship hull

vibrations due to propeller induced unsteady hull pressures.

• About 50% reduction in ship machinery vibration levels due to propeller induced unsteady shaft forces.

unsteady shaft thrust (Lb.) 1,200 1,000 800 600 400 200 0

unsteady hull pressure (Lb/Ft 2)> 120 100 80 60 40 20 0 bollard thrust (Lb.) 24,000 23,500 23,000 22,500 22,000 21,500 21,000 20,500 20,000 propeller efficiency (%) 45 46 47 48 49 50 51 52 53 54 55

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New Generation Workwheels

®

Type D

The Type D propeller is a work boat propeller supplied where large blade areas are required. It is highly effective for river applications and its unique blade tip design allows it to be used in either open or ducted propeller systems.

40 3.75 361 1030 422 1294 42 3.75 397 1136 466 1427 44 3.75 436 1247 541 1566 46 4 508 1363 599 1712 48 4 554 1484 657 1864 50 4.5 630 1610 746 2022 52 4.5 689 1741 821 2187 54 4.5 748 1878 895 2359 56 5 873 2020 1035 2537 58 5 947 2167 1129 2721 60 5 1020 2319 1220 2912 62 6 1258 2476 1479 3110 64 6 1349 2638 1593 3314 66 6 1438 2805 1704 3524 68 7 1751 2978 2041 3741 70 7 1860 3156 2178 3964 72 7 1966 3339 2311 4194 74 7 2077 3527 2451 4430 76 7 2206 3720 2612 4673 78 7 2329 3918 2768 4922 80 7.5 2594 4122 3066 5177 82 7.5 2744 4330 3254 5439 84 7.5 2888 4544 3435 5708 86 7.5 3039 4763 3624 5983 88 7.5 3212 4987 3840 6265 90 8 3530 5217 4202 6553 92 8 3703 5451 4419 6847 94 8 3900 5691 4667 7148 96 8 4088 5935 4903 7455 98 8.5 4523 6185 5407 7769 100 8.5 4738 6440 5675 8090 102 8.5 4961 6700 5953 8416 104 8.75 5287 6966 6336 8750 106 8.75 5528 7236 6646 9089 108 9 5877 7512 7057 9436 110 9 6137 7793 7381 9788 112 9 6407 8079 7717 10148 114 9.5 6900 8370 8290 10513 116 9.5 7189 8666 8651 10885 118 10 7726 8967 9262 11264 120 10 8036 9274 9647 11649 diameter inches max bore inches 5 blades D.A.R. 1.03 Lbs. blade area/sq. In. 4 blades

D.A.R. 0.82 Lbs. blade area/sq. In.

Propeller style

Counterbore, gland/seal optional Counterbore, gland/seal optional

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Cavitation patterns at full power

Workwheel Standard

series

Vessels with

New Generation Propulsion

5

The 5-blade section design is much less sensitive to cavitation when operating in non-uniform inflow common to workboats. This feature assures a propeller which reduces vibration levels approximately 50% below traditional workboat designs. • Landing Craft • Towboats • Fishing Vessels • Offshore Supply • Ferries

• Ocean Tugs – ITBs/ATBs • Crewboats • Yachts/Cruise • Swaths • Self-propelled Barges 40 3.75 293 729 333 905 42 3.75 318 804 364 998 44 3.75 346 882 398 1095 46 4 404 964 464 1197 48 4 437 1050 505 1303 50 4.5 498 1139 574 1414 52 4.5 540 1232 627 1529 54 4.5 582 1328 679 1649 56 5 687 1429 795 1773 58 5 740 1532 861 1902 60 5 792 1640 925 2036 62 6 1007 1751 1153 2174 64 6 1071 1866 1233 2316 66 6 1134 1984 1311 2463 68 7 1419 2106 1613 2615 70 7 1497 2232 1709 2771 72 7 1572 2361 1801 2931 74 7 1650 2494 1899 3097 76 7 1741 2631 2012 3266 78 7 1829 2771 2121 3440 80 7.5 2055 2915 2370 3619 82 7.5 2162 3063 2501 3802 84 7.5 2264 3214 2628 3990 86 7.5 2370 3369 2760 4182 88 7.5 2493 3528 2912 4379 90 8 2763 3690 3210 4580 92 8 2985 3856 3362 4786 94 8 3024 4025 3535 4997 96 8 3157 4198 3700 5212 98 8.5 3515 4375 4103 5431 100 8.5 3667 4555 4291 5655 102 8.5 3825 4739 4487 5883 104 8.75 4083 4927 4785 6116 106 8.75 4254 5118 4997 6354 108 9 4530 5313 5316 6596 110 9 4713 5512 5544 6842 112 9 4904 5714 5780 7093 114 9.5 5316 5920 6240 7349 116 9.5 5521 6310 6494 7609 118 10 5970 6343 6994 7874 120 10 6189 6560 7266 8143

Pacific type

The Pacific type propeller is usually supplied for freighters and fishing boats where nar-row blade area and large propeller diame-ters are essential to maintain efficient opera-tional characteristics. The blades of the Pacific type propeller are raked aft in order to gain greater clearance between the blade tips and the hull, thereby minimizing vibration problems. The Pacific type pro-peller can be furnished in either constant or graduated pitch specifications.

diameter inches max bore inches 5 blades D.A.R. 0.72 Lbs. blade area/sq. In. 4 blades

D.A.R. 0.58 Lbs. blade area/sq. In.

Propeller style

Puller holes standard Counterbore, gland/seal optional

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The Atlantic type propeller is a conventional constant pitch design. It can be provided in graduated pitch if required. This type pro-peller is generally supplied for fishing boats, work boats and other commercial applica-tions where maximum propeller diameter is limited and greater blade areas are required. The Atlantic type propeller is typically supplied with aft rake to maximize propeller diameter, but is also available in a ”no rake”design.

Atlantic type

Propeller style

40 3.75 270 628 313 817 356 1005 42 3.75 292 693 341 901 391 1108 44 3.75 316 760 372 988 429 1216 46 4 369 831 434 1080 499 1330 48 4 398 905 471 1176 545 1448 50 4.5 454 982 536 1276 619 1571 52 4.5 490 1062 584 1380 677 1699 54 4.5 526 1145 630 1489 735 1832 56 5 625 1232 742 1601 858 1970 58 5 671 1321 801 1717 930 2114 60 5 715 1414 858 1838 1002 2262 62 6 923 1510 1081 1962 1238 2415 64 6 979 1608 1153 2091 1327 2574 66 6 1033 1711 1223 2224 1413 2737 68 7 1309 1816 1516 2361 1723 2905 70 7 1376 1924 1603 2501 1830 3079 72 7 1440 2036 1687 2646 1933 3257 74 7 1508 2150 1775 2796 2042 3441 76 7 1586 2268 1879 2949 2167 3629 78 7 1662 2389 1975 3106 2288 3823 80 7.5 1876 2513 2213 3267 2549 4021 82 7.5 1968 2641 2332 3433 2696 4225 84 7.5 2055 2771 2446 3602 2836 4433 86 7.5 2147 2904 2565 3776 2983 4647 88 7.5 2253 3041 2703 3953 3153 4866 90 8 2507 3181 2988 4135 3467 5089 92 8 2612 3324 3123 4321 3635 5318 94 8 2737 3470 3280 4511 3828 5552 96 8 2847 3619 3429 4705 4011 5791 98 8.5 3179 3771 3810 4903 4440 6034 100 8.5 3310 3927 3980 5105 4649 6283 102 8.5 3446 4086 4156 5311 4867 6537 104 8.75 3682 4247 4434 5522 5187 6796 106 8.75 3827 4412 4625 5736 5422 7060 108 9 4080 4580 4923 5955 5766 7329 110 9 4239 4752 5129 6177 6019 7603 112 9 4403 4926 5342 6404 6282 7882 114 9.5 4788 5104 5778 6635 6769 8166 116 9.5 4964 5284 6007 6869 7051 8455 118 10 5384 5468 6482 7108 7580 8749 120 10 5573 5655 6727 7351 7882 9048

diameter inches max bore inches 5 blades D.A.R. 0.8 Lbs. blade area/sq. In. 4 blades

D.A.R. 0.65 Lbs. blade area/sq. In.

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3 blades D.A.R. 0.65 Lbs. blade area/sq. In.

The Type B propeller is designed to meet the needs of specialized work boat applications.

The Type B propeller blade’s leading edges, with semi-airfoil section, maintain top vessel operational efficiency while reducing the vibration problems inherent in conventional three and four blade propellers. They can be manufactured in either four or five blade configurations with graduated pitch.

Type B

40 3.75 270 628 304 779 42 3.75 292 693 331 859 44 3.75 316 760 360 943 46 4 369 831 421 1030 48 4 398 905 456 1122 50 4.5 454 982 519 1217 52 4.5 490 1062 564 1317 54 4.5 526 1145 609 1420 56 5 625 1232 718 1527 58 5 671 1321 774 1638 60 5 715 1414 829 1753 62 6 923 1510 1049 1872 64 6 979 1608 1117 1995 66 6 1033 1711 1184 2121 68 7 1309 1816 1475 2252 70 7 1376 1924 1557 2386 72 7 1440 2036 1637 2524 74 7 1508 2150 1721 2667 76 7 1586 2268 1818 2813 78 7 1662 2389 1912 2963 80 7.5 1876 2513 2145 3116 82 7.5 1968 2641 2259 3274 84 7.5 2055 2771 2367 3436 86 7.5 2147 2904 2481 3601 88 7.5 2253 3041 2612 3771 90 8 2507 3181 2890 3944 92 8 2612 3324 3021 4122 94 8 2737 3470 3170 4303 96 8 2847 3619 3312 4488 98 8.5 3179 3771 3683 4677 100 8.5 3310 3927 3845 4869 102 8.5 3446 4086 4014 5066 104 8.75 3682 4247 4283 5267 106 8.75 3827 4412 4466 5471 108 9 4080 4580 4754 5680 110 9 4239 4752 4950 5892 112 9 4403 4926 5154 6108 114 9.5 4788 5104 5580 6328 116 9.5 4964 5284 5798 6552 118 10 5384 5468 6262 6780 120 10 5573 5655 6496 7012 diameter inches max bore inches 5 blades D.A.R. 0.62 Lbs. blade area/sq. In. 4 blades

D.A.R. 0.5 Lbs. blade area/sq. In.

Propeller style

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