Re: Stus-List Max prop angle

[Ken Heaton via CnC-List]

Yup, and a tiny bit more. Useful on occasion.

Ken H.

On 28 March 2016 at 09:29, Bill Coleman via CnC-List <cnc-list@cnc-list.com>
wrote:

> Wow, you ought  to be able to get up to eight knots with that setup.
>
>
>
> Bill Coleman
>
>
>  Original message 
> From: Ken Heaton via CnC-List <cnc-list@cnc-list.com>
> Date: 3/27/2016 2:46 PM (GMT-05:00)
> To: cnc-list <cnc-list@cnc-list.com>
> Cc: Ken Heaton <kenhea...@gmail.com>
> Subject: Re: Stus-List Max prop angle
>
> This may just confuse thing as our engine is an atypical Yanmar Model:
> 3JH2-TBE so has a turbo and 47 Hp.
>
> Anyway, these are the specs on our prop and its pitch setting in inches (I
> don't know what that translates to in degrees):
>
> Propeller Make:  “J” Prop, Marine Propeller s.r.l
>
> Propeller Size:  18” - 3 blade
>
> Pitch: Set between Notches 7 & 8 R (19")
>
>
> Ken Heaton & Anne Tobin
> S/V Salazar - Can 54955
> C 37/40 XL - Hull # 67
> Cape Breton Island, Nova Scotia
>
> http://www.racethecape.ca/the-race/entrants/salazar/
>
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Re: Stus-List Max prop angle

[Bill Coleman via CnC-List]

Wow, you ought  to be able to get up to eight knots with that setup. 


Bill Coleman 

 Original message 
From: Ken Heaton via CnC-List <cnc-list@cnc-list.com> 
Date: 3/27/2016  2:46 PM  (GMT-05:00) 
To: cnc-list <cnc-list@cnc-list.com> 
Cc: Ken Heaton <kenhea...@gmail.com> 
Subject: Re: Stus-List Max prop angle 

This may just confuse thing as our engine is an atypical Yanmar Model: 3JH2-TBE 
so has a turbo and 47 Hp.
Anyway, these are the specs on our prop and its pitch setting in inches (I 
don't know what that translates to in degrees):
Propeller Make:  “J” Prop, Marine Propeller s.r.l
Propeller Size:  18” - 3 blade
Pitch: Set between Notches 7 & 8 R (19")

Ken Heaton & Anne Tobin
S/V Salazar - Can 54955
C 37/40 XL - Hull # 67
Cape Breton Island, Nova Scotia
http://www.racethecape.ca/the-race/entrants/salazar/

On 24 March 2016 at 09:21, Josh Muckley via CnC-List <cnc-list@cnc-list.com> 
wrote:
Double check the size.  I think mine is a 16" and I thought it was at 24°.  I 
also suggest getting a laser tach from Amazon.  The Yanmar tachs are notorious 
for being about 200 rpm slow.  Mine was.
It sounds like you already know that the pitch can only be changed in 2° 
increments and for every 2° you change rpm by about 10%.
What do you want to consider max RPM?  Mine had 3, 

max instantaneous = 3600

Max 1 hour = 3400

Max continuous = 3200
It is best to run at 80% load as often as possible.  So for me I pitched the 
prop to 3200 max and try to run at ~2500.
You'll also find that a dirty prop, shaft, and bottom can significantly change 
the load and subsequently change the max achievable rpm.  If your surveyor was 
basing his advice on your boat with a dirty bottom and prop then you may not 
need to do anything other than get them cleaned.  
Engine/fuel problems resulting in reduced power output can also lead one to 
believe that the bottom is dirty or the prop is incorrectly pitched.
When I adjusted my pitch I simply changed it by 1 increment (2°), with plans to 
do additional adjustments in future years if need be.  PM me if you'd like any 
other guidance/advice/details. 
Josh Muckley

S/V Sea Hawk

1989 C 37+

Solomons, MD
I have a 3 blade Max Prop, 17". The surveyor said to adjust propeller pitch to 
allow the engine to reach top speed in gear.

The current settings are for 24 degrees.

I think I am supposed  to reduce the angle.

I do not know how far off the speed is, so I am thinking of starting at 22.

Anyone else with a 37/40 know their pitch or angle?
Brian Fry

La Neige

37/40 XL

Havre de Grace MD

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___



This list is supported by the generous donations of our members. If you like 
what we do, please help us pay for our costs by donating. All Contributions are 
greatly appreciated!




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This list is supported by the generous donations of our members. If you like 
what we do, please help us pay for our costs by donating. All Contributions are 
greatly appreciated!

Re: Stus-List Max prop angle

[Ken Heaton via CnC-List]

This may just confuse thing as our engine is an atypical Yanmar Model:
3JH2-TBE so has a turbo and 47 Hp.

Anyway, these are the specs on our prop and its pitch setting in inches (I
don't know what that translates to in degrees):

Propeller Make:  “J” Prop, Marine Propeller s.r.l

Propeller Size:  18” - 3 blade

Pitch: Set between Notches 7 & 8 R (19")


Ken Heaton & Anne Tobin
S/V Salazar - Can 54955
C 37/40 XL - Hull # 67
Cape Breton Island, Nova Scotia

http://www.racethecape.ca/the-race/entrants/salazar/


On 24 March 2016 at 09:21, Josh Muckley via CnC-List 
wrote:

> Double check the size.  I think mine is a 16" and I thought it was at
> 24°.  I also suggest getting a laser tach from Amazon.  The Yanmar tachs
> are notorious for being about 200 rpm slow.  Mine was.
>
> It sounds like you already know that the pitch can only be changed in 2°
> increments and for every 2° you change rpm by about 10%.
>
> What do you want to consider max RPM?  Mine had 3,
> max instantaneous = 3600
> Max 1 hour = 3400
> Max continuous = 3200
>
> It is best to run at 80% load as often as possible.  So for me I pitched
> the prop to 3200 max and try to run at ~2500.
>
> You'll also find that a dirty prop, shaft, and bottom can significantly
> change the load and subsequently change the max achievable rpm.  If your
> surveyor was basing his advice on your boat with a dirty bottom and prop
> then you may not need to do anything other than get them cleaned.
>
> Engine/fuel problems resulting in reduced power output can also lead one
> to believe that the bottom is dirty or the prop is incorrectly pitched.
>
> When I adjusted my pitch I simply changed it by 1 increment (2°), with
> plans to do additional adjustments in future years if need be.  PM me if
> you'd like any other guidance/advice/details.
>
> Josh Muckley
> S/V Sea Hawk
> 1989 C 37+
> Solomons, MD
>
> I have a 3 blade Max Prop, 17". The surveyor said to adjust propeller
> pitch to allow the engine to reach top speed in gear.
> The current settings are for 24 degrees.
> I think I am supposed  to reduce the angle.
> I do not know how far off the speed is, so I am thinking of starting at 22.
> Anyone else with a 37/40 know their pitch or angle?
>
> Brian Fry
> La Neige
> 37/40 XL
> Havre de Grace MD
>
> ___
>
> This list is supported by the generous donations of our members. If you
> like what we do, please help us pay for our costs by donating. All
> Contributions are greatly appreciated!
>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> like what we do, please help us pay for our costs by donating. All
> Contributions are greatly appreciated!
>
>
___

This list is supported by the generous donations of our members. If you like 
what we do, please help us pay for our costs by donating. All Contributions are 
greatly appreciated!

Re: Stus-List Max prop angle

[Josh Muckley via CnC-List]

Double check the size.  I think mine is a 16" and I thought it was at 24°.
I also suggest getting a laser tach from Amazon.  The Yanmar tachs are
notorious for being about 200 rpm slow.  Mine was.

It sounds like you already know that the pitch can only be changed in 2°
increments and for every 2° you change rpm by about 10%.

What do you want to consider max RPM?  Mine had 3,
max instantaneous = 3600
Max 1 hour = 3400
Max continuous = 3200

It is best to run at 80% load as often as possible.  So for me I pitched
the prop to 3200 max and try to run at ~2500.

You'll also find that a dirty prop, shaft, and bottom can significantly
change the load and subsequently change the max achievable rpm.  If your
surveyor was basing his advice on your boat with a dirty bottom and prop
then you may not need to do anything other than get them cleaned.

Engine/fuel problems resulting in reduced power output can also lead one to
believe that the bottom is dirty or the prop is incorrectly pitched.

When I adjusted my pitch I simply changed it by 1 increment (2°), with
plans to do additional adjustments in future years if need be.  PM me if
you'd like any other guidance/advice/details.

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

I have a 3 blade Max Prop, 17". The surveyor said to adjust propeller pitch
to allow the engine to reach top speed in gear.
The current settings are for 24 degrees.
I think I am supposed  to reduce the angle.
I do not know how far off the speed is, so I am thinking of starting at 22.
Anyone else with a 37/40 know their pitch or angle?

Brian Fry
La Neige
37/40 XL
Havre de Grace MD

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Contributions are greatly appreciated!
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what we do, please help us pay for our costs by donating. All Contributions are 
greatly appreciated!

Re: Stus-List Max prop angle

[Jim Watts via CnC-List]

Give the people at PYI a shout with all the details: engine, reduction
gearing, and your boat specs. They will be able to get you far closer on
the first try.

Jim Watts
Paradigm Shift
C 35 Mk III
Victoria, BC

On 23 March 2016 at 19:18, David Knecht via CnC-List 
wrote:

> Hi Brian- If this helps, the MaxProp on my 34XL (+) is set to 16°
> according to the information provided by the PO.  I have not checked that
> myself.  The engine is a Universal M4-30.  Dave
>
> On Mar 23, 2016, at 7:45 PM, Brian Fry via CnC-List 
> wrote:
>
> I have a 3 blade Max Prop, 17". The surveyor said to adjust propeller
> pitch to allow the engine to reach top speed in gear.
> The current settings are for 24 degrees.
> I think I am supposed  to reduce the angle.
> I do not know how far off the speed is, so I am thinking of starting at 22.
> Anyone else with a 37/40 know their pitch or angle?
>
> Brian Fry
> La Neige
> 37/40 XL
> Havre de Grace MD
> ___
>
> This list is supported by the generous donations of our members. If you
> like what we do, please help us pay for our costs by donating. All
> Contributions are greatly appreciated!
>
>
> Aries
> 1990 C 34+
> New London, CT
>
>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> like what we do, please help us pay for our costs by donating. All
> Contributions are greatly appreciated!
>
>
___

This list is supported by the generous donations of our members. If you like 
what we do, please help us pay for our costs by donating. All Contributions are 
greatly appreciated!

Re: Stus-List Max prop angle

[David Knecht via CnC-List]

Hi Brian- If this helps, the MaxProp on my 34XL (+) is set to 16° according to 
the information provided by the PO.  I have not checked that myself.  The 
engine is a Universal M4-30.  Dave

On Mar 23, 2016, at 7:45 PM, Brian Fry via CnC-List  
wrote:

> I have a 3 blade Max Prop, 17". The surveyor said to adjust propeller pitch 
> to allow the engine to reach top speed in gear.
> The current settings are for 24 degrees.
> I think I am supposed  to reduce the angle.
> I do not know how far off the speed is, so I am thinking of starting at 22.
> Anyone else with a 37/40 know their pitch or angle?
> 
> Brian Fry
> La Neige
> 37/40 XL
> Havre de Grace MD
> 
> ___
> 
> This list is supported by the generous donations of our members. If you like 
> what we do, please help us pay for our costs by donating. All Contributions 
> are greatly appreciated!

Aries
1990 C 34+
New London, CT



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Re: Stus-List Max prop angle

[Martin DeYoung via CnC-List]

Brian,

When I adjust Calypso’s 3 Blade MAX prop 1 setting it seems to make a 10% 
change in pitch/engine speed.

Some yards will make a deal during slow times to allow several hauls and 
launches to test out the different pitch changes.  The service guys at PYI may 
be able to give you the most popular pitch setting for your engine, reduction 
gear, and hull.

I ran Calypso’s Perkins 4-108 slightly over pitched for a few years.  I changed 
it to slightly under pitched (the engine easily reaches max rpm) for a trip 
around Vancouver Island to be sure I could power into big seas and winds if 
needed.  I did not notice an increase in fuel consumption but I did notice a 
slightly reduced cruising speed at the smoothest RPM.  I am able to hit hull 
speed at higher RPMs.

Martin DeYoung
Calypso
1971 C 43
Seattle

[Description: Description: cid:D1BF9853-22F7-47FB-86F2-4115CE0BAF2F]

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Brian Fry 
via CnC-List
Sent: Wednesday, March 23, 2016 4:45 PM
To: cnc-list@cnc-list.com
Cc: Brian Fry
Subject: Stus-List Max prop angle


I have a 3 blade Max Prop, 17". The surveyor said to adjust propeller pitch to 
allow the engine to reach top speed in gear.
The current settings are for 24 degrees.
I think I am supposed  to reduce the angle.
I do not know how far off the speed is, so I am thinking of starting at 22.
Anyone else with a 37/40 know their pitch or angle?

Brian Fry
La Neige
37/40 XL
Havre de Grace MD
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what we do, please help us pay for our costs by donating. All Contributions are 
greatly appreciated!

Stus-List Max prop angle

[Brian Fry via CnC-List]

I have a 3 blade Max Prop, 17". The surveyor said to adjust propeller pitch
to allow the engine to reach top speed in gear.
The current settings are for 24 degrees.
I think I am supposed  to reduce the angle.
I do not know how far off the speed is, so I am thinking of starting at 22.
Anyone else with a 37/40 know their pitch or angle?

Brian Fry
La Neige
37/40 XL
Havre de Grace MD
___

This list is supported by the generous donations of our members. If you like 
what we do, please help us pay for our costs by donating. All Contributions are 
greatly appreciated!