Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-09-2016, 02:43   #1
Registered User

Join Date: Mar 2016
Posts: 3
3 blade props, can Yanmar sail drives handle it?

I have 2 blade (fixed) props on the 46' Hughes cat we just bought. I'm inclined to switch to 3 blade, but hesitate over concern for the old Yanmar SD 20 saildrives' ability to withstand the additional torque, and general loading over the long haul. Does anyone have experience with this choice. Thanks.
__________________

__________________
Lew M is offline   Reply With Quote
Old 20-09-2016, 04:44   #2
Registered User
 
UNCIVILIZED's Avatar

Join Date: Jun 2014
Location: Up the mast, looking for clean wind.
Boat: Anything entertaining.
Posts: 3,518
Re: 3 blade props, can Yanmar sail drives handle it?

Welcome to CF!

On your question. My thinking is that if you can't switch to such propellers, then a whole bunch of folks all screwed up severely in signing off on your propulsion units. As they need to be able to handle a lot more thrust then you'll ever be able to apply via prop changes.
That said, they're the ones that you need to ask, given that they built them.

Have you considered going to feathering props at all? That way you get to have excellent handling characteristics under power, & retain having little drag from your props when under sail. Those qualities & more have kept me as being a Maxprop fan or several decades.


PS: Which of Kurt's designs? I'm a bit jealous as he draws some nice boats.
__________________

__________________

The Uncommon Thing, The Hard Thing, The Important Thing (in Life): Making Promises to Yourself, And Keeping Them.
UNCIVILIZED is online now   Reply With Quote
Old 20-09-2016, 06:21   #3
Moderator Emeritus
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 29,884
Images: 240
Re: 3 blade props, can Yanmar sail drives handle it?

Greetings and welcome aboard the CF, Lew.

See ➥ http://portal.mastry.com/bulletins/S...0Selection.pdf
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is online now   Reply With Quote
Old 20-09-2016, 10:57   #4
Registered User

Join Date: Jun 2007
Location: SW Florida
Boat: FP Belize, 43' - Dot Dun
Posts: 3,071
Re: 3 blade props, can Yanmar sail drives handle it?

Quote:
Originally Posted by Lew M View Post
I have 2 blade (fixed) props on the 46' Hughes cat we just bought. I'm inclined to switch to 3 blade, but hesitate over concern for the old Yanmar SD 20 saildrives' ability to withstand the additional torque, and general loading over the long haul. Does anyone have experience with this choice. Thanks.
Any specific reason for wanting 3 blade props?
__________________
DotDun is offline   Reply With Quote
Old 20-09-2016, 15:11   #5
Registered User
 
Sailorman Ed's Avatar

Join Date: Jun 2010
Boat: Polynesia 40/42
Posts: 678
Images: 15
Send a message via Skype™ to Sailorman Ed
Re: 3 blade props, can Yanmar sail drives handle it?

I have 3 blades on my SD20 but seems a bit of a load on my 2GM20 engines. They do seems to cause more drag when under sail.
If you decide to replace yours, I would be interested in buying your old 2 blade props.
Ed
__________________
Sailorman Ed is offline   Reply With Quote
Reply

Tags
3 blade, sail, yanmar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Helia 44: Sail Drives and Props Cotemar Fountaine Pajot 17 26-12-2016 07:19
Mahe 36: Sail Drives and Props jean1146 Fountaine Pajot 160 07-02-2015 09:35
Lipari 41: Sail Drives and Props Cotemar Fountaine Pajot 4 09-10-2012 03:29
Sail-Drives or Shaft Drives? RubyBishop Multihull Sailboats 24 07-09-2009 10:14
WTB: Stock 3-Blade Props for Yanmar SD30 quartersplash Classifieds Archive 0 27-07-2009 21:19


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:47.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.