Re: Stus-List Prop pitch

[George Cone via CnC-List]

I do have a spare 2 blade fixed that was on my C 40 that you can try, I 
suspect it will be a lot closer than what you are using now, and I am in the 
Shelburne shipyard to get it, my shaft is 1 1/8” the replacement prop is   16 x 
11, my 3 hm27 will rev to 3000.

George



From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Della Barba, 
Joe via CnC-List
Sent: Monday, December 18, 2017 2:51 PM
To: cnc-list@cnc-list.com
Cc: Della Barba, Joe ; Daniel Sheer 

Subject: Re: Stus-List Prop pitch

Goes to Amazon UK??

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Daniel Sheer 
via CnC-List
Sent: Monday, December 18, 2017 2:44 PM
To: cnc-list@cnc-list.com
Cc: Daniel Sheer >
Subject: Stus-List Prop pitch

Try this spreadsheet.

http://www.surfbaud.co.uk/wave/

Dan Sheer
Pegathy - LF 38
Rock Creek off the Patapsco


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Re: Stus-List Prop pitch

[Della Barba, Joe via CnC-List]

Goes to Amazon UK??

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Daniel Sheer 
via CnC-List
Sent: Monday, December 18, 2017 2:44 PM
To: cnc-list@cnc-list.com
Cc: Daniel Sheer 
Subject: Stus-List Prop pitch

Try this spreadsheet.

http://www.surfbaud.co.uk/wave/

Dan Sheer
Pegathy - LF 38
Rock Creek off the Patapsco


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Stus-List Prop pitch

[Daniel Sheer via CnC-List]

Try this spreadsheet.
http://www.surfbaud.co.uk/wave/
Dan SheerPegathy - LF 38Rock Creek off the Patapsco

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Re: Stus-List Propeller Pitch

[Della Barba, Joe via CnC-List]

You REALLY need less pitch and/or less diameter, and maybe less blades. This is 
really really hard on your engine.

Joe
Coquina

-Original Message-
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bunky via 
CnC-List
Sent: Monday, December 18, 2017 1:25 PM
To: cnc-list@cnc-list.com
Cc: Bunky 
Subject: Stus-List Propeller Pitch

Thanks for all the helpful comments and thoughts. Luna's problem is that 
she cruises under power at about 5.5 kts at 1500rpm, but starts to smoke 
and overheat above that. She'll do about 6kts at 1800rpm. Next time I 
pull her out, I'll have a closer look at the prop.

I have the original owner's manual, but the chart showing the propeller 
specifications is gone. Does anyone with a 35MK III have the original 
propeller specifications?

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Stus-List Propeller Pitch

[Bunky via CnC-List]

Thanks for all the helpful comments and thoughts. Luna's problem is that 
she cruises under power at about 5.5 kts at 1500rpm, but starts to smoke 
and overheat above that. She'll do about 6kts at 1800rpm. Next time I 
pull her out, I'll have a closer look at the prop.


I have the original owner's manual, but the chart showing the propeller 
specifications is gone. Does anyone with a 35MK III have the original 
propeller specifications?


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Re: Stus-List PROPELLER PITCH

[Della Barba, Joe via CnC-List]

It is not an exact science, IIRC power boaters will use loaner props and swap 
them around to find the best one. It is very hard on a diesel to not be able to 
hit the factory spec max RPMs, gasoline engines tolerate this much better.

Joe
Coquina

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Joel Aronson 
via CnC-List
Sent: Monday, December 18, 2017 12:45 PM
To: cnc-list@cnc-list.com
Cc: Joel Aronson 
Subject: Re: Stus-List PROPELLER PITCH

Richard

My MaxProp was set to 14 degrees.  Gear ration was 2.6:1

Joel

On Mon, Dec 18, 2017 at 11:24 AM, Dennis C. via CnC-List 
> wrote:
Take prop manufacturers recommendations with a grain of salt.  Years ago I 
requested a recommendation from Flexofold.  The rep at the time was Chuck Angle 
who was highly regarded.  He said he didn't have a good prop recommendation for 
my 35-1.  :)  I went with Martec.

In 2011, I repeated the request and got a recommendation for a 15 x 12.
In 2016, I again asked and they said 16 x 12.

Currently, Touche' is swinging a 14 x 14 Martec which seems a bit under pitched 
(or too small a diameter).  I can run at 6.4-6.5 knots at cruise rpm (80% max, 
2450 rpm) and flat water, no wind.

On my list for next year's haul out is to measure and document (photograph) the 
prop tip clearance distance.  I will also measure the hub and swing pin 
location.  The swing plane for different props varies.

I think prop selection is part science, part art and a bit of voodoo.

Dennis C.
Touche' 35-1 #83
Mandeville, LA

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Re: Stus-List PROPELLER PITCH

[coltrek via CnC-List]

One advantage of using the manufacturer's recommendation though, is that if it 
isn't quite right, they will usually fix it. My three bladed Gori would not 
quite get up to max RPM, and smoked a little bit, so I sent it back. They sent 
it over to Denmark or wherever they make them and took a half an inch off the 
OD, airmailed it back, and it worked perfectly




Bill ColemanC 39

 Original message 
From: "Dennis C. via CnC-List"  
Date: 12/18/17  11:24  (GMT-05:00) 
To: CnClist  
Cc: "Dennis C."  
Subject: Re: Stus-List PROPELLER PITCH 

Take prop manufacturers recommendations with a grain of salt.  Years ago I 
requested a recommendation from Flexofold.  The rep at the time was Chuck Angle 
who was highly regarded.  He said he didn't have a good prop recommendation for 
my 35-1.  :)  I went with Martec.
In 2011, I repeated the request and got a recommendation for a 15 x 12.In 2016, 
I again asked and they said 16 x 12.
Currently, Touche' is swinging a 14 x 14 Martec which seems a bit under pitched 
(or too small a diameter).  I can run at 6.4-6.5 knots at cruise rpm (80% max, 
2450 rpm) and flat water, no wind.
On my list for next year's haul out is to measure and document (photograph) the 
prop tip clearance distance.  I will also measure the hub and swing pin 
location.  The swing plane for different props varies.
I think prop selection is part science, part art and a bit of voodoo.
Dennis C.Touche' 35-1 #83Mandeville, LA
On Mon, Dec 18, 2017 at 9:59 AM, Rick Brass via CnC-List 
 wrote:
The problem that I see with this calculator is that there is no value for prop 
diameter (and slip is pretty intangible, though I suspect using .10 slip might 
be a good approximation for 90% efficiency). The rule of thumb that a local 
propshop told me is that changing prop diameter by 1” is approximately 
equivalent to changing the prop pitch by 2”. So diameter also enters into the 
calculation. I believe each prop maker has their own calculator for 
recommending initial diameter and pitch, based on boat weight, engine HP and 
targeted cruising RPM, transmission reduction ratio, and hull speed. Rick 
BrassWashington, NC   From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On 
Behalf Of svpegasus38 via CnC-List
Sent: Sunday, December 17, 2017 5:56 PM
To: cnc-list@cnc-list.com
Cc: svpegasus38 
Subject: Re: Stus-List PROPELLER PITCH Try this propellor calculator. 
rbbi.com/folders/prop/propcalc.htm   Sent from my T-Mobile 4G LTE DeviceDoug 
Mountjoy POYC Rebecca Leah Lf39  Original message From: Bunky 
via CnC-List  Date: 12/17/17 14:18 (GMT-08:00) To: 
cnc-list@cnc-list.com Cc: Bunky  Subject: 
Stus-List PROPELLER PITCH  Luna is a 1984 C 35 with a Yanmar 3gm30 engine. 
Does anyone know what 
the proper propeller pitch should be? She has an aftermarket Maxiprop, 
and based on engine performance, I believe the pitch may be set too high.

Richard
Luna, Lake Champlain, VT

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every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray






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Re: Stus-List PROPELLER PITCH

[Joel Aronson via CnC-List]

Richard

My MaxProp was set to 14 degrees.  Gear ration was 2.6:1

Joel

On Mon, Dec 18, 2017 at 11:24 AM, Dennis C. via CnC-List <
cnc-list@cnc-list.com> wrote:

> Take prop manufacturers recommendations with a grain of salt.  Years ago I
> requested a recommendation from Flexofold.  The rep at the time was Chuck
> Angle who was highly regarded.  He said he didn't have a good prop
> recommendation for my 35-1.  :)  I went with Martec.
>
> In 2011, I repeated the request and got a recommendation for a 15 x 12.
> In 2016, I again asked and they said 16 x 12.
>
> Currently, Touche' is swinging a 14 x 14 Martec which seems a bit under
> pitched (or too small a diameter).  I can run at 6.4-6.5 knots at cruise
> rpm (80% max, 2450 rpm) and flat water, no wind.
>
> On my list for next year's haul out is to measure and document
> (photograph) the prop tip clearance distance.  I will also measure the hub
> and swing pin location.  The swing plane for different props varies.
>
> I think prop selection is part science, part art and a bit of voodoo.
>
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA
>
> On Mon, Dec 18, 2017 at 9:59 AM, Rick Brass via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> The problem that I see with this calculator is that there is no value for
>> prop diameter (and slip is pretty intangible, though I suspect using .10
>> slip might be a good approximation for 90% efficiency).
>>
>>
>>
>> The rule of thumb that a local propshop told me is that changing prop
>> diameter by 1” is approximately equivalent to changing the prop pitch by
>> 2”. So diameter also enters into the calculation.
>>
>>
>>
>> I believe each prop maker has their own calculator for recommending
>> initial diameter and pitch, based on boat weight, engine HP and targeted
>> cruising RPM, transmission reduction ratio, and hull speed.
>>
>>
>>
>> Rick Brass
>>
>> Washington, NC
>>
>>
>>
>>
>>
>>
>>
>> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of 
>> *svpegasus38
>> via CnC-List
>> *Sent:* Sunday, December 17, 2017 5:56 PM
>> *To:* cnc-list@cnc-list.com
>> *Cc:* svpegasus38 
>> *Subject:* Re: Stus-List PROPELLER PITCH
>>
>>
>>
>> Try this propellor calculator.
>>
>> rbbi.com/folders/prop/propcalc.htm
>>
>>
>>
>>
>>
>>
>>
>> Sent from my T-Mobile 4G LTE Device
>>
>> Doug Mountjoy
>>
>> POYC
>>
>> Rebecca Leah
>>
>> Lf39
>>
>>
>>
>>  Original message 
>>
>> From: Bunky via CnC-List 
>>
>> Date: 12/17/17 14:18 (GMT-08:00)
>>
>> To: cnc-list@cnc-list.com
>>
>> Cc: Bunky 
>>
>> Subject: Stus-List PROPELLER PITCH
>>
>>
>>
>> Luna is a 1984 C 35 with a Yanmar 3gm30 engine. Does anyone know what
>> the proper propeller pitch should be? She has an aftermarket Maxiprop,
>> and based on engine performance, I believe the pitch may be set too high.
>>
>> Richard
>> Luna, Lake Champlain, VT
>>
>> ___
>>
>> Thanks everyone for supporting this list with your contributions.  Each
>> and every one is greatly appreciated.  If you want to support the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>
>> ___
>>
>> Thanks everyone for supporting this list with your contributions.  Each
>> and every one is greatly appreciated.  If you want to support the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>
>>
>>
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
>


-- 
Joel
301 541 8551 <(301)%20541-8551>
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Re: Stus-List PROPELLER PITCH

[Dennis C. via CnC-List]

Matthew,

They did the same for me in 2011 and 2016.  For example here's the 2016
reply:

"With a Universal M25XPB, 26/3000 ( gear reduction ratio 1:2,05 ) we would
recommend a 2-blade 16x12R propeller for your C 35mki. Please confirm the
HP/RPM as this engine comes in different variants concerning HP and RPM."

The 2011 reply had the same information attached from the submission form.

"Thank you for your inquiry regarding a Flexofold propeller for your C 35
Mark I.  For your boat, with that  Universal 25XPB  engine, I would
recommend a 15 x 11 RH 2-blade Flexofold ($1095 + shipping) Adding the
racing blade option for that prop the cost of the prop would come up to 15
x 12 RH or ($1305 + shipping)"

So which do you believe?

Dennis C.

On Mon, Dec 18, 2017 at 11:33 AM, Matthew L. Wolford via CnC-List <
cnc-list@cnc-list.com> wrote:

> Flexofold has gotten better.  When I replaced my prop a year ago, they
> wanted to know not only shaft size, but also information about my engine
> and transmission.  This is how they responded:
>
>
> Hello Matthew
>
>
>
> Thank you for the missing gear reduction.
>
>
>
> With a Westerbeke W40, max rated 37hp/3000rpm (V-drive) ( gear reduction
> ratio 1:2,00 ) we would recommend a 2-blade 17x12L or a 3-blade 16x12-3L
> propeller for your C 42.
>
>
> I ended up getting the two-blade and am happy with it.  The best part is
> that it’s no big deal if I forget to send somebody down below to turn the
> shaft when we go racing.
>
>
> *From:* Dennis C. via CnC-List 
> *Sent:* Monday, December 18, 2017 11:24 AM
> *To:* CnClist 
> *Cc:* Dennis C. 
> *Subject:* Re: Stus-List PROPELLER PITCH
>
> Take prop manufacturers recommendations with a grain of salt.  Years ago I
> requested a recommendation from Flexofold.  The rep at the time was Chuck
> Angle who was highly regarded.  He said he didn't have a good prop
> recommendation for my 35-1.  :)  I went with Martec.
>
> In 2011, I repeated the request and got a recommendation for a 15 x 12.
> In 2016, I again asked and they said 16 x 12.
>
> Currently, Touche' is swinging a 14 x 14 Martec which seems a bit under
> pitched (or too small a diameter).  I can run at 6.4-6.5 knots at cruise
> rpm (80% max, 2450 rpm) and flat water, no wind.
>
> On my list for next year's haul out is to measure and document
> (photograph) the prop tip clearance distance.  I will also measure the hub
> and swing pin location.  The swing plane for different props varies.
>
> I think prop selection is part science, part art and a bit of voodoo.
>
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA
>
>
>>
>>
>>
>
> --
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
>
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every one is greatly appreciated.  If you want to support the list - use PayPal 
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Re: Stus-List PROPELLER PITCH

[Matthew L. Wolford via CnC-List]

Flexofold has gotten better.  When I replaced my prop a year ago, they wanted 
to know not only shaft size, but also information about my engine and 
transmission.  This is how they responded:

Hello Matthew



Thank you for the missing gear reduction.



With a Westerbeke W40, max rated 37hp/3000rpm (V-drive) ( gear reduction ratio 
1:2,00 ) we would recommend a 2-blade 17x12L or a 3-blade 16x12-3L propeller 
for your C 42.



I ended up getting the two-blade and am happy with it.  The best part is that 
it’s no big deal if I forget to send somebody down below to turn the shaft when 
we go racing.


From: Dennis C. via CnC-List 
Sent: Monday, December 18, 2017 11:24 AM
To: CnClist 
Cc: Dennis C. 
Subject: Re: Stus-List PROPELLER PITCH

Take prop manufacturers recommendations with a grain of salt.  Years ago I 
requested a recommendation from Flexofold.  The rep at the time was Chuck Angle 
who was highly regarded.  He said he didn't have a good prop recommendation for 
my 35-1.  :)  I went with Martec. 

In 2011, I repeated the request and got a recommendation for a 15 x 12.
In 2016, I again asked and they said 16 x 12.

Currently, Touche' is swinging a 14 x 14 Martec which seems a bit under pitched 
(or too small a diameter).  I can run at 6.4-6.5 knots at cruise rpm (80% max, 
2450 rpm) and flat water, no wind.

On my list for next year's haul out is to measure and document (photograph) the 
prop tip clearance distance.  I will also measure the hub and swing pin 
location.  The swing plane for different props varies.

I think prop selection is part science, part art and a bit of voodoo.

Dennis C.
Touche' 35-1 #83
Mandeville, LA

On Mon, Dec 18, 2017 at 9:59 AM, Rick Brass via CnC-List 
 wrote:

  The problem that I see with this calculator is that there is no value for 
prop diameter (and slip is pretty intangible, though I suspect using .10 slip 
might be a good approximation for 90% efficiency).



  The rule of thumb that a local propshop told me is that changing prop 
diameter by 1” is approximately equivalent to changing the prop pitch by 2”. So 
diameter also enters into the calculation.



  I believe each prop maker has their own calculator for recommending initial 
diameter and pitch, based on boat weight, engine HP and targeted cruising RPM, 
transmission reduction ratio, and hull speed.



  Rick Brass

  Washington, NC







  From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of 
svpegasus38 via CnC-List
  Sent: Sunday, December 17, 2017 5:56 PM
  To: cnc-list@cnc-list.com
  Cc: svpegasus38 
  Subject: Re: Stus-List PROPELLER PITCH



  Try this propellor calculator. 

  rbbi.com/folders/prop/propcalc.htm







  Sent from my T-Mobile 4G LTE Device

  Doug Mountjoy 

  POYC 

  Rebecca Leah 

  Lf39



   Original message 

  From: Bunky via CnC-List  

  Date: 12/17/17 14:18 (GMT-08:00) 

  To: cnc-list@cnc-list.com 

  Cc: Bunky  

  Subject: Stus-List PROPELLER PITCH 



  Luna is a 1984 C 35 with a Yanmar 3gm30 engine. Does anyone know what 
  the proper propeller pitch should be? She has an aftermarket Maxiprop, 
  and based on engine performance, I believe the pitch may be set too high.

  Richard
  Luna, Lake Champlain, VT

  ___

  Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray


  ___

  Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray







___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List PROPELLER PITCH

[Dennis C. via CnC-List]

Take prop manufacturers recommendations with a grain of salt.  Years ago I
requested a recommendation from Flexofold.  The rep at the time was Chuck
Angle who was highly regarded.  He said he didn't have a good prop
recommendation for my 35-1.  :)  I went with Martec.

In 2011, I repeated the request and got a recommendation for a 15 x 12.
In 2016, I again asked and they said 16 x 12.

Currently, Touche' is swinging a 14 x 14 Martec which seems a bit under
pitched (or too small a diameter).  I can run at 6.4-6.5 knots at cruise
rpm (80% max, 2450 rpm) and flat water, no wind.

On my list for next year's haul out is to measure and document (photograph)
the prop tip clearance distance.  I will also measure the hub and swing pin
location.  The swing plane for different props varies.

I think prop selection is part science, part art and a bit of voodoo.

Dennis C.
Touche' 35-1 #83
Mandeville, LA

On Mon, Dec 18, 2017 at 9:59 AM, Rick Brass via CnC-List <
cnc-list@cnc-list.com> wrote:

> The problem that I see with this calculator is that there is no value for
> prop diameter (and slip is pretty intangible, though I suspect using .10
> slip might be a good approximation for 90% efficiency).
>
>
>
> The rule of thumb that a local propshop told me is that changing prop
> diameter by 1” is approximately equivalent to changing the prop pitch by
> 2”. So diameter also enters into the calculation.
>
>
>
> I believe each prop maker has their own calculator for recommending
> initial diameter and pitch, based on boat weight, engine HP and targeted
> cruising RPM, transmission reduction ratio, and hull speed.
>
>
>
> Rick Brass
>
> Washington, NC
>
>
>
>
>
>
>
> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of 
> *svpegasus38
> via CnC-List
> *Sent:* Sunday, December 17, 2017 5:56 PM
> *To:* cnc-list@cnc-list.com
> *Cc:* svpegasus38 
> *Subject:* Re: Stus-List PROPELLER PITCH
>
>
>
> Try this propellor calculator.
>
> rbbi.com/folders/prop/propcalc.htm
>
>
>
>
>
>
>
> Sent from my T-Mobile 4G LTE Device
>
> Doug Mountjoy
>
> POYC
>
> Rebecca Leah
>
> Lf39
>
>
>
>  Original message 
>
> From: Bunky via CnC-List 
>
> Date: 12/17/17 14:18 (GMT-08:00)
>
> To: cnc-list@cnc-list.com
>
> Cc: Bunky 
>
> Subject: Stus-List PROPELLER PITCH
>
>
>
> Luna is a 1984 C 35 with a Yanmar 3gm30 engine. Does anyone know what
> the proper propeller pitch should be? She has an aftermarket Maxiprop,
> and based on engine performance, I believe the pitch may be set too high.
>
> Richard
> Luna, Lake Champlain, VT
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
>
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List PROPELLER PITCH

[Rick Brass via CnC-List]

The problem that I see with this calculator is that there is no value for prop 
diameter (and slip is pretty intangible, though I suspect using .10 slip might 
be a good approximation for 90% efficiency).

 

The rule of thumb that a local propshop told me is that changing prop diameter 
by 1” is approximately equivalent to changing the prop pitch by 2”. So diameter 
also enters into the calculation.

 

I believe each prop maker has their own calculator for recommending initial 
diameter and pitch, based on boat weight, engine HP and targeted cruising RPM, 
transmission reduction ratio, and hull speed.

 

Rick Brass

Washington, NC

 

 

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of svpegasus38 
via CnC-List
Sent: Sunday, December 17, 2017 5:56 PM
To: cnc-list@cnc-list.com
Cc: svpegasus38 
Subject: Re: Stus-List PROPELLER PITCH

 

Try this propellor calculator. 

rbbi.com/folders/prop/propcalc.htm

 

 

 

Sent from my T-Mobile 4G LTE Device

Doug Mountjoy 

POYC 

Rebecca Leah 

Lf39

 

 Original message 

From: Bunky via CnC-List  
> 

Date: 12/17/17 14:18 (GMT-08:00) 

To: cnc-list@cnc-list.com   

Cc: Bunky  > 

Subject: Stus-List PROPELLER PITCH 

 

Luna is a 1984 C 35 with a Yanmar 3gm30 engine. Does anyone know what 
the proper propeller pitch should be? She has an aftermarket Maxiprop, 
and based on engine performance, I believe the pitch may be set too high.

Richard
Luna, Lake Champlain, VT

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Re: Stus-List PROPELLER PITCH

[Hoyt, Mike via CnC-List]

Hi

I have 3GM30F with Kanzaki KM3P transmission and 1 inch shaft.  Boat is Frers 
33 so a bit different.  Prop that came with the boat was Martec Eliptical 
RH16DX14P-3.  This may be of some use.

The Martec was replaced last Fall with a Flex-o-Fold (better reverse/less 
vibration).  They spec'd the prop as below:
"With a 3GM30F, 27/3600 ( gear reduction ratio 1:2,61 ) we would recommend a 
2-blade 16x12R or a 3-blade 16x11-3R propeller for your Frers 33."

Note that the Martec has 10 years use and is available if anyone is looking

Mike
Persistence 
Halifax, NS
http://users.eastlink.ca/~mhoyt

-Original Message-
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bunky via 
CnC-List
Sent: Sunday, December 17, 2017 6:18 PM
To: cnc-list@cnc-list.com
Cc: Bunky
Subject: Stus-List PROPELLER PITCH

Luna is a 1984 C 35 with a Yanmar 3gm30 engine. Does anyone know what the 
proper propeller pitch should be? She has an aftermarket Maxiprop, and based on 
engine performance, I believe the pitch may be set too high.

Richard
Luna, Lake Champlain, VT

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray


___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray