SDC RECOMMENDATIONS   -  Manufacturers Specifications  ………

as at  December  2006



























Engine		 Model Saildrive H'Power @ RPM Redn Shaft SDC           Sloop
  Catamaran
C SDC


Model SAE Max Ratio Max OD" Pitch" Tip°
Pitch" Tip°

Ref # I















NB:  PITCH IN INCHES IS CALCULATED FROM THE TIP ANGLE SET AT THE GIVEN DIAMETER




       BENCHMARK INSTALLATIONS ARE IN BLACK BELOW WITH SDC REFERENCE

















BETA BZ482SD
13.5 3600 2.20 1636









BD722SD
20 3600 2.20 1636









BD1005SD
28 3600 2.20 1636






















BUKH DV18SME
18 3600 2.25 1600 14 9.9 13







DV20SME
20 3000 2.25 1333 16 13.0 15



6002 2

DV24SME
24 3600 2.25 1600 15 10







DV30SME
30 3600 2.25 1600 15 12







DV32SME
32 3600 2.25 1600 15 13







DV36SME
36 3600 2.25 1600 16 12







DV48SME
48 3600 2.25 1600 17 12



















LOMBARDINI LDW502SD S 11.5 3600 2.18 1651









LDW702SD S 18 3600 2.18 1651 15 8







LDW1003SD S 28 3600 2.18 1651 16 9.6 11







LDW1404SD S 37 3600 2.18 1651 16 11.3 13
12.2 14
C 6005 2














LDW1904SD M 37 3000 1.92 1563 16 13






Not Available LDW2204SD M 57 3600 1.92 1875








Not Available LDW2204TSD M 83 3200 1.92 1667





















NANNI 4.11O
30 3600 2.40 1500 16 11
13.9 16





4.150HE
37 3000 2.00 1500 17 11







HD150
37 3000 2.31 1299 18 12







Nanni
21 3600 2.20 1636





















NANNI 2.45 SD10 10 3600 2.43 1481









2.50 SD10 14 3600 2.43 1481
























3.75 SD10 21 3600 2.43 1481 15 11







3.100 SD10 29 3600 2.43 1481 16 12

















































































NANNI 4.150 SD10 37 3000 2.20 1364 17 15.6 17







4.195 SD10 40 2800 2.20 1273 18 11







4.220 SD10 50 2800 2.20 1273 19 12







4.200 SD10 60 2800 2.20 1273 20 12






NANNI 5.280 SD10 62 2800 2.20 1273





















VETUS M2.C5 ZF-HURTH 11 3000 2.16 1389









M2.D5 ZF-HURTH 13 3000 2.16 1389









M2.06 ZF-HURTH 16 3600 2.52 1429 15 11.4 14







M3.09 ZF-HURTH 25 3600 2.52 1429 16 13.9 16







M4.15 ZF-HURTH 33 3000 2.16 1389 17 14.7 16







M4.17 ZF-HURTH 42 3000 2.16 1389









VH4.65 ZF-HURTH 65 3000 2.16 1389









VH4.80 ZF-HURTH 80 4000 2.52 1587























VOLVO 2002 120S 18 3200 2.20 1455 15 10.6 13







2003 120S 28 3200 2.20 1455 16 13.0 15







2003T 120S 43 3200 2.20 1455 17 14.7 16




















VOLVO 2020 130S 18 3600 2.47 1457 15 10







2030 130S 28 3600 2.47 1457 16 13.9 16



6006 1

2040 130S 38 3600 2.47 1457 17 12




















VOLVO D1-13 130S 12 3200 2.19 1461









D1-20 130S 18 3200 2.19 1461 15 10







D1-30 130S 28 3200 2.19 1461 16 13.9 16







D2-40 130S 39 3200 2.19 1461 17 14.7 16






Not Available D2-55 130S 53 3000 2.19 1370 18 12




















Not Available D2-75 150S 72 3000 2.19 1370





































MD11C
23 2500 1.66 1506









MD11D
25 3000 2.20 1364 17 12.9 14







MD7B
17 3000 2.20 1364 16 12.2 14







MD17C
35 2500 1.66 1506 17 11







MD22L
49 3000 2.20 1364 18 12




















YANMAR 2GM SD20 15 3600 2.64 1364 15 10.6 13



6004 2

3GM SD20 22 3600 2.64 1364 16 13.0 15
















































YANMAR 1GM10 SD20 9 3600 2.64 1364























2YM15 SD20 14 3600 2.64 1364 15 10.6 13




















2GM20 SD20 18 3600 2.64 1364 15 11.4 14







3YM20 SD20 21 3600 2.64 1364 16 13.0 15



















3GM30 SD20 27 3600 2.64 1364 17 12.9 14
13.8 15
C 6003 1

3YM30 SD20 29 3600 2.64 1364 17 12.9 14
13.8 15

















YANMAR 3JH4CE SD50 40 3000 2.32 1293 18 12





















4JH3-TCE SD40-T 54 3000 2.32 1293 19 12




















4JH4CE SD50 54 3000 2.32 1293 19 12






Not Available 4JH3-TCE SD50-T 75 3800 2.32 1638 19 12



















YANMAR 3HM35 SD30 35 3200 2.60 1231









3JH2CE SD31 38 3600 2.31 1558 16 14







3JH2TCE SD31 47 3600 2.31 1558 17 13







3JH2TE
47 3600 2.45 1469









3JH3C
40 3800 2.31 1645 16 12





















4JH2CE
51 3800 2.31 1645 17 11







4JH3CE
55 3800 2.32 1638 17 12































NB:  SD31 is 2.31:1 - Older SD20 / SD30 is 2.64:1  SD40 & 50"s are 2.32:1
































NB:  SDC units are only available in Left Handed Rotation which is the industry standard for Saildrives









































SIZING COMMENTS: The above diameter and pitch settings derived from the tip angle have been successful on a particular installation.



As a general rule faster boats such as cats will require higher pitch settings - generally 1 inch.





The same engine in different states of repair will deliver different power curves.






Blocked engine exhaust risers are the most common cause of power loss and failure to achieve expected rpm.



Unless identical - the above will only serve as the best available guide to sizing.






Personal choice is also a factor - different users prefer different throttle settings at cruise.





Variable Pitch allows the user to create what is an optimal propeller setting for their particular situation.















DIAMETERS: The above diameters represent the diameter at the tip with pitch setting of 12 inches at the tip.





Pitch adjustments will alter these diameters very slightly due to the angled blade mounting.





























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