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s-drive sd 50 and fixed three-blade propeller

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Affè View Drop Down
Sub Lieutenant
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Joined: 13 January 2024
Location: Nettuno Italy
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Affè Quote  Post ReplyReply Direct Link To This Post Topic: s-drive sd 50 and fixed three-blade propeller
    Posted: 13 January 2024 at 17:28
Hello, I would like to change my steerable triple propeller to a fixed triple propeller.
I have a sail-drive sd 50, the doubt arises from the fact that on the operating manual of the s-drive there is only the assembly of a fixed two-bladed blade.
Is it possible to mount a fixed three-blade?
Has anyone in the forum mounted this type of propeller ?
Thank you!
I send the same question in Italian Hanse Forum . I apologize for the repetition 
Hi, I'm very happy about my Hanse 430
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johnyred View Drop Down
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Joined: 30 October 2011
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Post Options Post Options   Thanks (0) Thanks(0)   Quote johnyred Quote  Post ReplyReply Direct Link To This Post Posted: 30 April 2024 at 17:21
Our 508 came with a fixed two blade propeller and we changed it to a three blade.
Dont see any problem doing so. Of course you have to install an equivalent performance propeller. 
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Issywa View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Issywa Quote  Post ReplyReply Direct Link To This Post Posted: 24 December 2024 at 07:31
Any update on your prop?
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Captain Cook View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 02 February 2025 at 12:05
My 400 with Yanmar SD50 has a 3-blade Flex-O-Fold 17X14,3.
Another 400E has once stated here, that a 18x12 gives him 8 knots at full throttle (3000 RPM).

1)   You need to take off the propeller to see the markings: 18+2 = 18x12

uploads/729/flexofold3bladeinstall.pdf

uploads/729/Yachting_Monthy_Test_2009_2025-02-02_12-04-50.pdf

uploads/729/foldingprops_2025-02-02_12-06-16.pdf



Edited by Captain Cook - 02 February 2025 at 12:06
Freya H400 #27 (2006),2-cabin, 40HP 3JH4E, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M603(VHF)+M802(SSB)
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