Propeller for 40/40

Engines, Drive trains, Propellers, Steering, Ground Tackle and other mechanical system
Riki
Posts: 46
Joined: Thu Mar 31, 2016 10:50 pm

Propeller for 40/40

Post by Riki »

We need a new propeller on our 40/40 and would like to find out what others have put on and if you are happy or unhappy with your choice. We appreciate all opinions and advice.
Thank you!
Riki
1997 Freedom 40/40 Hull #27

F32Circle
Posts: 90
Joined: Thu Nov 08, 2012 9:14 am

Re: Propeller for 40/40

Post by F32Circle »

Happy with our Maxprop. Better than some folding props for reversing, it’s been said. I’ve not seen data.
F32 Hull #67, Saybook CT.
Yanmar 3GMF, Loose-footed Main, MaxProp, Ronca, Muir windlass,
Heart Interface inverter/charger, SeaFrost

admin
Site Admin
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Re: Propeller for 40/40

Post by admin »

I have a 3 blade MaxProp and am quite happy with it.

Based upon some research that I did a few years ago, I think that it's over sized as you don't want the the tips going supersonic. I posted about this a few years ago, but I'm on my way back from Guatemala after storing the boat for hurricane season, and don't have time to look it up.

-- Geoff(in Miami)

admin
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Re: Propeller for 40/40

Post by admin »


Laisve
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Joined: Wed Apr 04, 2018 11:22 am

Re: Propeller for 40/40

Post by Laisve »

Geoff, or anyone with a F40/40 and a Yanmar 3JH-TE, would you happen to know what the reduction gear ratio is on the transmission?
Freedom 40/40
Portsmouth, RI

Laisve
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Re: Propeller for 40/40

Post by Laisve »

That link seems to be broken.
Freedom 40/40
Portsmouth, RI

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GeoffSchultz
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Re: Propeller for 40/40

Post by GeoffSchultz »

The URL had changed and I have edited the post to reflect the correct URL, which is:

https://www.morganscloud.com/2016/04/17 ... ur-engine/
BlueJacket
1997 Freedom 40/40
http://www.GeoffSchultz.org

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GeoffSchultz
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Re: Propeller for 40/40

Post by GeoffSchultz »

The Kanzaki KM3A has a ratio of 2.64
BlueJacket
1997 Freedom 40/40
http://www.GeoffSchultz.org

Mark K.
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Joined: Sun Jul 31, 2016 4:32 pm

Re: Propeller for 40/40

Post by Mark K. »

If racing, a folding or feathering prop is the way to go. I like the thrust and durability of a fixed 3-blade (especially for cruising) and put a Campbell Sailor on my F35. https://westbynorth.com/campbell-sailer/

The downside of a Max Prop is all the moving parts, less forward thrust compared to a fixed blade and the fact that when feathered, there is a gap between the blades and hub which can catch seaweed, fishing line and the like.

Mark K.
1994 Freedom 35'

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GeoffSchultz
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Re: Propeller for 40/40

Post by GeoffSchultz »

I disagree with the comments from Mark K. Please see https://www.sailmagazine.com/diy/why-lo ... propellers this article in Sail magazine.

-- Geoff
BlueJacket
1997 Freedom 40/40
http://www.GeoffSchultz.org

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