Re: Stus-List CnC-List Digest, Vol 127, Issue 25

[Chris Tirtirau via CnC-List]

Brian,
This is great insight, big thanks to you for taking the time to respond.
Cheers,
Chris

Sent from my iPhone

> On Aug 5, 2016, at 5:44 PM, cnc-list-requ...@cnc-list.com wrote:
> 
> Send CnC-List mailing list submissions to
>cnc-list@cnc-list.com
> 
> To subscribe or unsubscribe via the World Wide Web, visit
>http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
> or, via email, send a message with subject or body 'help' to
>cnc-list-requ...@cnc-list.com
> 
> You can reach the person managing the list at
>cnc-list-ow...@cnc-list.com
> 
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of CnC-List digest..."
> 
> 
> Today's Topics:
> 
>   1. Re:  Bad Vibes from Maxprop? (Nauset Beach)
>   2. Re:  Finally Won a Race (Joel Aronson)
>   3. Re:  Finally Won a Race (David Knecht)
> 
> 
> --
> 
> Message: 1
> Date: Fri, 5 Aug 2016 15:48:18 -0400
> From: "Nauset Beach" 
> To: 
> Subject: Re: Stus-List Bad Vibes from Maxprop?
> Message-ID: <00c701d1ef52$50b63450$f2229cf0$@optonline.net>
> Content-Type: text/plain;charset="us-ascii"
> 
> Chris,
> 
> It sounds like the pitch of your prop may be too high.  Several of us on the
> list have been told by "experts" that X" of pitch was the correct amount for
> our engine / gear reduction / boat, only to get excessive vibration and not
> be able to reach anything close to maximum RPM even in a full throttle test.
> I believe all of us have significantly reduced if not eliminated the
> vibration by stepping down the pitch &/or diameter of the prop.  
> 
> Possibly a way to test if the vibration is actually coming from the rudder
> is to have someone go below and feel the rudder shaft when under power.
> Would think you would be able to feel something if the vibration is that
> bad.  
> 
>> From what I have read, if you went to a 3 blade from a 2 blade the prop
> should be considerably smoother.   
> 
> Brian
> 
> -Original Message-
> From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Chris
> Tirtirau via CnC-List
> Sent: Tuesday, August 02, 2016 8:30 PM
> To: cnc-list@cnc-list.com
> Cc: Chris Tirtirau 
> Subject: Stus-List Bad Vibes from Maxprop?
> 
> I got a strange vibration/sound coming from outside the hull, under the
> cockpit floor, when motoring in my 37. After seeing two separate mechanics I
> was told it was the rudder vibrating and creating harmonics as the water
> pushed by the Maxprop flows by it. Apparently harmless but annoying and to
> me unsettling nevertheless. I cannot reach cruising speed with that sound
> and vibration under my feet.
> Any ideas? I have the original 2-bladed prop. Should I revert to original,
> or can anything be done about the Maxprop? I talked to the Maxprop people
> and I had the pitch set according to their specs but it looks like the C&C
> rudder design doesn't like it.
> Christian Tirtirau,
> C&C 37 Northern Light
> ___
> 
> 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!
> 
> 
> 
> 
> 
> --
> 
> 
> 
> --
> 
> End of CnC-List Digest, Vol 127, Issue 25
> *

___

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!

Stus-List Bad Vibes from Maxprop?

[Chris Tirtirau via CnC-List]

I got a strange vibration/sound coming from outside the hull, under the cockpit 
floor, when motoring in my 37. After seeing two separate mechanics I was told 
it was the rudder vibrating and creating harmonics as the water pushed by the 
Maxprop flows by it. Apparently harmless but annoying and to me unsettling 
nevertheless. I cannot reach cruising speed with that sound and vibration under 
my feet.
Any ideas? I have the original 2-bladed prop. Should I revert to original, or 
can anything be done about the Maxprop? I talked to the Maxprop people and I 
had the pitch set according to their specs but it looks like the C&C rudder 
design doesn't like it.
Christian Tirtirau,
C&C 37 Northern Light
___

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!

Stus-List Dropping the Rudder

[Chris Tirtirau via CnC-List]

@ Josh, thanks for the pics, great stuff.
@Graham, I'm at the RNSYS, and I was asking what steps you ned to take to drop 
the rudder? Once out, we'll scoop out the old foam, replace and close the skin 
cutout, as per the classic procedure. But first I need to know how to drop the 
rudder.
Cheers guys,
Chris

Sent from my iPhone

> On May 25, 2016, at 11:59 PM, cnc-list-requ...@cnc-list.com wrote:
> 
> Send CnC-List mailing list submissions to
>cnc-list@cnc-list.com
> 
> To subscribe or unsubscribe via the World Wide Web, visit
>http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
> or, via email, send a message with subject or body 'help' to
>cnc-list-requ...@cnc-list.com
> 
> You can reach the person managing the list at
>cnc-list-ow...@cnc-list.com
> 
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of CnC-List digest..."
> 
> 
> Today's Topics:
> 
>   1. Re:  Simrad WP30 just turns to starboard (Andrew Burton)
>   2. Re:  Simrad WP30 just turns to starboard (Rick Brass)
>   3. Re:  Simrad WP30 just turns to starboard (Andrew Means)
>   4. Re:  Dropping the Rudder (Lee)
> 
> 
> --
> 
> Message: 1
> Date: Wed, 25 May 2016 22:21:48 -0400
> From: Andrew Burton 
> To: cnc-list@cnc-list.com
> Subject: Re: Stus-List Simrad WP30 just turns to starboard
> Message-ID: 
> Content-Type: text/plain; charset="utf-8"
> 
> The first thing I check when an autopilot goes wonky is the rudder angle 
> indicator. It will often come unhooked from its tiller above the quadrant.
> 
> Andy
> C&C 40
> Peregrine
> 
> Andrew Burton
> 61 W Narragansett
> Newport, RI 
> USA02840
> 
> http://sites.google.com/site/andrewburtonyachtservices/
> +401 965-5260
> 
>> On May 25, 2016, at 20:57, Andrew Means via CnC-List  
>> wrote:
>> 
>> Hey all - 
>> 
>> I?ve got a Simrad WP30 that only seems to like steering to starboard. After 
>> following the instructions in the manual for holding a course it does 
>> nothing except make many small adjustments to starboard, at which point the 
>> boat just goes in circles. The PO said he thought it had worked at one 
>> point, but never used it. The manual isn?t helpful at all, and these posts 
>> from Cruisers Forum don?t seem to offer up any solutions.
>> 
>> Is there any hope for my unit, or should I be looking for another? I?m 
>> hoping to do more singlehanded sailing later this year and I?d really like 
>> to have an autopilot for longer passages. The WP30 is exactly the level of 
>> functionality I?m looking for - just something that can hold a course and 
>> tack. Sub $500 would be awesome, I assume at that price I?m going to be 
>> looking for a used unit. Any suggestions? 
>> 
>> -- 
>> Andrew Means
>> S.V. Safari - 1977 C&C 34 Mk I
>> Seattle, WA
>> ___
>> 
>> This list is supported by the generous donations of our members. If you like 
>> what we do, please help us pay for our costs by donating. All Contributions 
>> are greatly appreciated!
> -- next part --
> An HTML attachment was scrubbed...
> URL: 
> 
> 
> --
> 
> Message: 2
> Date: Wed, 25 May 2016 22:24:10 -0400
> From: "Rick Brass" 
> To: 
> Subject: Re: Stus-List Simrad WP30 just turns to starboard
> Message-ID: <000a01d1b6f5$b0555480$10fffd80$@earthlink.net>
> Content-Type: text/plain; charset="utf-8"
> 
> I have an even older Navico WP5000 on my 38, and had a similar problem a 
> couple of years ago. It would track straight but drift to port ? basically 
> the wheel would turn when the pilot was adjusting to port but not when the 
> adjustment was to starboard. Turned out that the belt was worn and slipping 
> in one direction. A new belt and increasing the tension on the belt fixed my 
> problem. YMMV.
> 
> 
> 
> Rick Brass
> 
> Washington, NC
> 
> 
> 
> 
> 
> 
> 
> From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Andrew 
> Means via CnC-List
> Sent: Wednesday, May 25, 2016 8:58 PM
> To: cnc-list@cnc-list.com
> Cc: Andrew Means 
> Subject: Stus-List Simrad WP30 just turns to starboard
> 
> 
> 
> Hey all - 
> 
> 
> 
> I?ve got a Simrad WP30 that only seems to like steering to starboard. After 
> following the instructions in  
> 
>  the manual for holding a course it does nothing except make many small 
> adjustments to starboard, at which point the boat just goes in circles. The 
> PO said he thought it had worked at one point, but never used it. The manual 
> isn?t helpful at all, and these 
>    
>  
> posts from Cruisers Forum don?t seem to offer u