Folding propellers

[nalle]

Hi
I am proud owner to an Oceanis 411.

Need some advice since I have plans of replacing my three blades fixed
propeller to a similar folding propeller

One suppliers recommend size 18" and 12" to 12"

Do anyone have any recommendations or experience of replacing
propeller.

[Dean Forbis]

Oh, goody !! Here we go...

:-)
Dean

[Noble, Milner E.]

You know...it was going to be a nice spring... :-(
--Milner

-----Original Message-----
From: Benetea...@googlegroups.com [mailto:Benetea...@googlegroups.com] On Behalf Of Dean Forbis
Sent: Wednesday, April 09, 2008 9:33 AM
To: Benetea...@googlegroups.com
Subject: {Beneteau Owners} Re: Folding propellers

Oh, goody !! Here we go...

:-)
Dean

-----Original Message-----
From: Benetea...@googlegroups.com
[mailto:Benetea...@googlegroups.com] On Behalf Of nalle
Sent: Wednesday, April 09, 2008 8:48 AM
To: Beneteau Owners
Cc: ana...@telia.com
Subject: {Beneteau Owners} Folding propellers

[Charles McCormack]

I put a Kiwi feathering prop on my Oceanis 400. Don't know how much faster she sails but there is far less turbulence in the wake...must be a good sign. Stopping power in reverse is big. Some claim it will stop the boat in its lenght spill drinks!. You have to watch out in reverse as the boat accelerates faster because of the coarse pitch in reverse. Forward pitch is adjustable.
Gets good reviews if you google it.
I'm happy with my upgrade.
Charlie

[Daryl Davies]

You can contact Chuck at Flex-o-fold.   ams...@flexofold.com



 I have 3 bladed folding props on my Ben 40 and 46 and the two bladed on my Ben10R.  Also have a friend with one on a Ben 447.  Work great, easy to replace the zincs and easy to install.

Daryl

[Daryl Davies]

Dean,

next time someone is wondering if the list is active, rather than
sending a blank email asking that question, simply ask about props--
you get more responses:-).

DAryl

[Howell Cooper]

Single words suffice to see if the list is active:
Props
Bottom Paint
Electronics
Varnish
Snow vs What's that?
Batteries
and lately bilge switches
hatch leaks

Howell Cooper
Why Knot
Port Aransas, TX

[max...@cox.net]

Everyone got out their knives before they read the email. The guy wanted advice on prop size - diameter and pitch. He didn't ask about what brand.

Someone with 411 experience might give him some help, and if they know the URL of the 411 web site, that could help as well.

I hate to spoil your fun, but really!

Max Lynn

[comsto...@charter.net]

We have a Max Prop on our 411 and am happy with it.

Diane and Bill \ Sea Frog

[Berni Koch]

The 411 site is: www.intersessions.com/411

Berni

[Carleton Bryant]

It will depend on the power of you engine.  Our 411 has the Westerbeke 42 and our Flex-O Fold 3-blade is 18" X 12".

Regards,

Carl Bryant 

"Gambei"  B411 #53

[Daryl Davies]

One other point,

If you are going to replace the prop yourself -- it is easy, but you will need the yard to give you a gear puller to get the old prop off.

ON my Ben 40 when I thought it came with a 40Hp the 3 bladed prop that was recommended from Flex-O-Fold was 18X12RH 3 blade.  When I found out that my boat had a 54Hp the blade set was changed to 20X12 RH 3 blade.

You will see an increase in sailing performance with a folding prop.  It is money well spent.

Best of luck

Daryl
Claire Elise  Ben 40 #74

[Rick Donovan]

the prop dimensions of pitch and diameter are determined by a number of factors, including the boat model. you will need to provide your boat model and year, the engine manufacturer, engine model, transmission manufacturer and model as well as the transmission ratios (ratios are normally on a tag on the transmission) to the prospective prop manufacturer and they take all of that info and make recommendations for pitch, diameter, etc for their prop. another manufacturer may recommend something slightly different in pitch and or diameter to take advantage of the efficiency of their prop.

with that info I would expect that the manufacturer of the prop you have in mind to have all the necessary dimensions, pitch, shaft taper, etc.   if they don't have the information for their prop once you provide all that info, you need to be looking for another manufacturer.

if you are seeking a recommendation on what prop to consider, be prepared for lots of opinions that will probably cover the map. as others have mentioned already this is one of those questions that most sailors on this list feel very strongly about brand loyalty. please clarify your question so that the list can answer you correctly.

It is my opinion, that what ever you decide to put on for a folding or feathering prop will be a big improvement over your fixed prop in sailing speed thru the water. I would think in the neighborhood of .5 knots, some do more some do less but that should be a good guess to begin with. some designs are better than others for a number of reasons and once you get looking into the designs of each one it will become apparent to you. this is not rocket science.

Rick Donovan

2002 Beneteau 473

Turn the Page

Falmouth, Maine

[Ca...@aol.com]

In a message dated 4/9/2008 4:45:03 PM Eastern Daylight Time, richard....@verizon.net writes:

It is my opinion, that what ever you decide to put on for a folding or feathering prop will be a big improvement over your fixed prop in sailing speed thru the water. I would think in the neighborhood of .5 knots, some do more some do less but that should be a good guess to begin with. some designs are better than others for a number of reasons and once you get looking into the designs of each one it will become apparent to you. this is not rocket science.

We remain happy with our Autoprop ... OK ... I just had to chime in!

Seems the autopitch aspect of the prop gives us >10% better fuel efficiency than non self pitching props. You have to putt putt around a bunch to justify the cost, but I think we are managing a justification given $3.50 fuel. Figure $0.35/hour and add it up.

Remember, feathering doesn't equal self pitching. If I was a racer I would get a Max-Prop even though it is inefficient at any speed. It has excellent efficiency when sailing. I have heard that folding props are less than fabulous at reverse. True? Autoprop backs up quite nicely.

At any rate, we have made our bed and like sleeping in it, have a fixed prop in the spare parts bin, and manage 7+ knots at <3,000 RPM @ 1 GPH. Match that with your RV Vehicle!

Cap & Linda Munday
Zydeco, Beneteau 473 #20
Norfolk, for now


**************
Planning your summer road trip? Check out AOL Travel Guides.
(http://travel.aol.com/travel-guide/united-states?ncid=aoltrv00030000000016)

[ENJOY]

I have a 2011 Beneteau 40, 54Hp Yanmar gear ratio 2:36, and driven by a flexofold 19/11 3R. I am under propped for my Yanmar 54. Flexofold suggested 19/14 3R. What are others using, and is it worth spending 2,500 Canadian for the three blades, as the hub is fine. Thank you in advance for your input.

[Mark Stillwell]

I have a 3 blade 18/11 J-prop on my Westerbeke 44a. It replaced the fixed 3 blade 18/11 fixed prop.

We are happy w the J-Prop.

Mark Stillwell 

S/V Dragonfly 

573.819.0436

On Nov 18, 2018, at 11:55 PM, ENJOY <john...@gmail.com> wrote:

I have a 2011 Beneteau 40, 54Hp Yanmar gear ratio 2:36, and driven by a flexofold 19/11 3R. I am under propped for my Yanmar 54. Flexofold suggested 19/14 3R. What are others using, and is it worth spending 2,500 Canadian for the three blades, as the hub is fine. Thank you in advance for your input.

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[iamdave]

Did you loose any speed with the Autoprop?  How has maintaince been?  Been thinking about getting one for our 473?

[or or]

How could you loose speed with an Autoprop? We sailed faster than with a fixed prop and motored faster with the Autoprop than with the fixed prop while using less fuel. During our cruising 5 years I figure we saved enough fuel to pay for the prop. Maintenance is to grease the blade bearings when painting the bottom. A removable zerk is included with the prop.

Cap Munday

--

[John Van Den Hengel]

Thank you for the information Mark

Sent from a Google Pixel

[Kidd, James]

Relating to purely motoring, It's my belief that any folding or feathering prop is going to be second-place to a fixed prop.
The benefits That you will see are in reverse such as with max prop, fuel efficiency with autoprop, etc.
I'm considering taking my 473 to Miami next year from Sag Harbor, which would most likely be motoring most of the way.
Thus, I Will likely be placing my fixed three blade back on for the trip (removing my max prop)

Not trying to start prop wars, but Any input for this idea would be welcomed.

James

Sent from my iPhone

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[John Van Den Hengel]

Thank you for your input Kim

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[iamdave]

I ask because our speed motoring around 2600RPM is generally in the 7+ range which your indicating was around 3k.  Not a big deal, was just trying to figure out any disadvantages to this purchase :)

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[or or]

I should have been more precise than just saying less than 3,000 RPM. I don't recall the exact revs and speed but as I remember we were at or under 2,500 most of the time and averaged about 7kts. Since the pitch would vary depending on having ether head or tail wind and my speed was measured by GPS, the number of variables (include current) were high so I considered it tough to pin down. 

We cruised in company with a more lightly laden 473 and I was able to verify we used between 10% and 20% less fuel but we didn't compare RPM. I did find that our motor sailing speed increased significantly with the Autoprop at ~1200 RPM. 

Good luck!

Cap Munday

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