30u Prop

[Paul Miller]

I’m considering a Flex-o-Fold prop for my 30u. The manufacturer has recommended a 17/12 two blade. The price seems okay but I would like to be sure about the specs. Does anyone have a Flex-o-Fold on their 30u? For what it’s worth my engine is a W33 with 2:1 reduction but I doubt that it would be any different from the more common W27.

I have a fixed two blade now but unfortunately I don’t know the size (and it’s in the water)  so I’d also be interested in the specs of anyone else’s fixed two blade.

Thanks 

Paul M 

NS30U #211, Sandpiper 

Cowichan Bay, B.C.

[Jim Cosgrove]

Paul,

I have the 3 blade Flexofold prop on my 30U with a W-27. Off hand I don’t recall the dimensions but could look for them if you’re interested. 

Jim Cosgrove 

FATE 30 U #343

Galesville MD


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[James Blackwell]

Paul

I will install the following before launch this season:

1 pcs   15x12-3 R bladeset                                                                
1 pcs   1" SAE, 3-blade hub  

I went with the three blade for the slightly reduced vibration and slightly more efficient motive force.

I will let you know how it goes.

James

"Apollo" Nonsuch 30 U 415 1987

Marblehead, MA

[James Blackwell]

PS. I have the W27 and the reduction is 2.1:1. The experts at Flexofold are very familiar with Nonsuchs. I would go with their recommendation for your specs. They are very responsive.

James Blackwell

"Apollo" Nonsuch 30U #415 '87

Marblehead, MA

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[Don Crossley]

Hi Paul,

I am also thinking about getting a Flexofold prop. Did you purchase it locally? And what is the cost in Cdn$?

Thanks,

Don

'87 NS30U Breezin'

Vancouver BC

[Paul Miller]

I ordered direct from Flex-O-Fold in Denmark. Their quoted price (two blade) was 1405 USD including shipping. My payments were $1686 CAD plus $212 CAD in taxes and customs charges. 

Paul M

NS30U #211, Sandpiper 

Cowichan Bay, B.C.

[Don Crossley]

Thanks for the info. Please let us know how it performs once installed.

Don

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[Paul Miller]

I will. I’m not hauling out until June but I’ll post then.

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Paul M
NS30U #211, Sandpiper

Cowichan Bay B.C.

[Mike Parfett]

Interesting that Flexfold recommended a 17/12 two blade for you Paul. Here is what they recommended for my NS30:

• Volvo Penta MD2030 (max. rated 28 hp / 3600 rpm, gear reduction ratio 1:2,47 ) we recommend a 2-blade 16X12L

So I guess I would have a little less power & torque and slower shaft rotation than Paul's boat (W33 / 2:1), but I have a saildrive, so maybe more efficient since it is not angled downwards at all and perhaps deeper?.  I expect that I will go with Flexofold's recommendation, but just curious as to why the difference. Probably real world experience/rule of thumb (with some very complex fluid dynamics behind that).

Mike

NS30 #26

Port Moody, BC

[Charles A. Mitchell, III]

I have a 33, but also recommend looking at PYI maxiprop. . call them with the HP of your engine and they will make a suitable prop recommendation. I have had maxi props on my last two boats with good results

Chuck Mitchell

Cape Cod, MA

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[Fred Rachwitz]

Is ‘maxiprop’ just another name for ‘maxprop’ as mine is labeled?  

Fred Rachwitz

Concerto

Nonsuch 30 U #445

Harbor Springs, Michigan

Northern Lake Michigan

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Fred 

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On Mar 26, 2022, at 3:16 PM, Charles A. Mitchell, III <chuckso...@gmail.com> wrote:



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[Charles A. Mitchell, III]

maybe, is PYI the company who made it?

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[Mark Powers La Reina 26C Vancouver, B.C.]

The Maxprop was designed by Maximilian Bianchi and is manufactured in Italy. I believe PYI is the leading distributor/vendor of the Maxprop in the Pacific Northwest and May all of North America.

Mark Powers

[Fred Rachwitz]

My recollection is that PYI was a distributor  in relation to MaxProp.  I know when I purchased Concerto in 2007 I was completely unfamiliar with folding or feathering props. It had a “Maxprop” 2 blade feathering prop. After my first season I had it overhauled and checked out by PYI as somehow I had learned they dealt in MaxProps. My experience with them was fabulous. When returned to me the prop looked and felt like I imagined a new one would. I faithfully have greased it with their recommended lube every year and have not had a single issue. 

I need to check my literature and get back to you to confirm things. Will try to do soon as I can get to the boat easily, even here in the still frozen north. 

Fred Rachwitz

Concerto

Nonsuch 30 U #445

Harbor Springs, Michigan

Northern Lake Michigan

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On Mar 27, 2022, at 3:45 PM, Charles A. Mitchell, III <chuckso...@gmail.com> wrote:



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[Fred Rachwitz]

Wow, Mark beat me to it but confirmed my thinking. And, he is right about the Italian manufacture I remember now. I’ll still check my literature. 

Fred Rachwitz

Concerto

Nonsuch 30 U #445

Harbor Springs, Michigan

Northern Lake Michigan

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Fred 

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On Mar 27, 2022, at 4:00 PM, Mark Powers La Reina 26C Vancouver, B.C. <r...@shaw.ca> wrote:

The Maxprop was designed by Maximilian Bianchi and is manufactured in Italy. I believe PYI is the leading distributor/vendor of the Maxprop in the Pacific Northwest and May all of North America.

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[Paul Miller]

I did look at Maxprop but at twice the price, I couldn’t find twice the value.

More moving parts, more maintenance, and as I sail in a bay full of crab/prawn traps in season, folding is less likely to catch a line.

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Paul M
NS30U #211, Sandpiper

Cowichan Bay B.C.

[Don Crossley]

Hi Paul,

I finally got a quote from Flexofold. My NS 30U has a Westerbeke 35D-Three engine with 31 HP at 3000 RPM, 1" shaft and 2.134 reduction. My current pop is a 3 bladed 17" Autoprop.

I wanted a 3 bladed prop, Flexofold recommended a 15" x 13" 3R prop. This is 2" smaller than my current prop. I am wondering if they gave you a 3 bladed prop recomenndation as well? If so, what size & pitch?

Thanks,

Don

[Paul Miller]

Sorry Don, they only quoted me for the two blade. Anyway my engine is a W33 and my gear is 2:1 so it wouldn’t be apples to apples anyway.

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[Charles A. Mitchell, III]

how about gori?

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[James Blackwell]

There are some good review articles on this subject and good previous discussion and several types that Nonsuchers have been very happy with.

I chose the Flexofold for the following reasons.

Overall, near or at the top in most rating categories. The only one, as I recall, that it wasn't was stopping power. Like most engineered systems, there are compromises.

What pushed me over was overall simple, robust design and Calder's recommendation.

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[Mike Parfett]

I did purchase a flexofold this year, and asked the manufacturer for paint recommendations. Their reply (which surprised me, but likely not more experienced owners) was: " We recommend that you don´t do any painting or modification at first. This if there should be the very rare need of some exchange. In such case, the propeller parts must be kept in original condition.".

Anyway, glad I asked. 

Mike

NS30C

Port Moody, BC

[Don Crossley]

Hi Mike, what size Flexofold prop did you get, and is it 2 or 3 blades? Also what engine HP and transmission reduction do you have?

FYI, in my 30+ years of experience, props were not painted, but polished with a buffing wheel. Usually little growth of barnacles on polished metal. Now many paint their props and shafts with zinc spray paint. Two years ago in July, when I bought boat, they zinc spray painted shaft & prop. A year later when I pulled boat in June, there were more barnacles on prop & shaft than I have ever seen before. See photos. But I painted it again with zinc spray paint. Last month I pulled boat, and there were only two or three barnacles. In the off season I run engine, in gear, at dock every 3-4 weeks, in part to keep growth off prop. Also, zinc spray used two years ago was not same as Martyr brand used last year. I'm not convinced that painting prop and shaft are necessary. But I do paint the strut.

Don

'87 NS 30 Ultra #369

Vancouver BC

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[Mike Parfett]

Hi Don,

I  have a Volvo Penta MD2030 (max. rated 28 hp / 3600 rpm, gear reduction ratio 1:2,47 ) with a saildrive.  Flexofold recommended a 2-blade 16X12L or a 3-blade 16X11-3L. I went with the 2 blade mainly because it was C$1000 less than the 3 blade.

Thanks for providing your experience regarding polishing vs. zinc paint varieties. I'll follow your schedule of regularly running the engine in gear and see how well the barnacles are kept under control.

Mike