Re: Stus-List C 35-3 Actual Drive

2018-10-29 Thread Jim Watts via CnC-List 
It would depend more on flare above the waterline than beam.

Jim Watts
Paradigm Shift
C 35 Mk III
Victoria, BC


On Mon, 29 Oct 2018 at 20:16, Marek Dziedzic via CnC-List <
cnc-list@cnc-list.com> wrote:

> Probably somewhat empirical number, but it has to change depending on the
> shape of the boat (the more beamy it is, the less it would sink with the
> same increase of weight), doesn’t it?
>
>
>
> Marek
>
>
>
> 1994 C270 ”Legato” (quite beamy)
>
> Ottawa, ON
>
>
>
>
>
>
>
> *From:* CnC-List  *On Behalf Of *Jim Watts
> via CnC-List
> *Sent:* Monday, October 29, 2018 21:51
> *To:* 1 CnC List 
> *Cc:* Jim Watts 
> *Subject:* Re: Stus-List C 35-3 Actual Drive
>
>
>
> Swiped off the internet:
>
>
>
> POUNDS PER INCH IMMERSION (PPI):
> The weight required to sink the yacht one inch.
> It is calculated by multiplying the LWL area by 5.333 for sea water or 5.2
> for fresh.
> The PPI usually increases as the hull sinks into the water as the LWL area
> is also increasing
> due to the shape of the hull above water.
>
>
>
>
>
> Jim Watts
> Paradigm Shift
> C 35 Mk III
> Victoria, BC
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Re: Stus-List C 35-3 Actual Drive (Draft?)

2018-10-29 Thread Neil Gallagher via CnC-List 
It's a matter of waterplane area (the area of the plane created by your 
waterline).  What it amounts to is that the weight to sink one inch is 
equal to the weight of the water pushed aside as the boat sinks one 
inch.  That amount of water is the waterplane area x 1". If you are in 
light water (fresh) it takes less weight to sink 1" than if you're in 
heavy water (salt), with salt water being 2.5% heavier than fresh, in 
general.


In general a beamy hull will have more waterplane area for a given 
length than a narrow hull, so yes, a beamy boat would take more weight 
to sink 1"


Neil Gallagher
Weatherly, 35-1
Glen Cove, NY

On 10/29/2018 11:15 PM, Marek Dziedzic via CnC-List wrote:


Probably somewhat empirical number, but it has to change depending on 
the shape of the boat (the more beamy it is, the less it would sink 
with the same increase of weight), doesn’t it?


Marek

1994 C270 ”Legato” (quite beamy)

Ottawa, ON

*From:*CnC-List  *On Behalf Of *Jim 
Watts via CnC-List

*Sent:* Monday, October 29, 2018 21:51
*To:* 1 CnC List 
*Cc:* Jim Watts 
*Subject:* Re: Stus-List C 35-3 Actual Drive

Swiped off the internet:

POUNDS PER INCH IMMERSION (PPI):
The weight required to sink the yacht one inch.
It is calculated by multiplying the LWL area by 5.333 for sea water or 
5.2 for fresh.
The PPI usually increases as the hull sinks into the water as the LWL 
area is also increasing

due to the shape of the hull above water.

Jim Watts
Paradigm Shift
C 35 Mk III
Victoria, BC



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Re: Stus-List C 35-3 Actual Drive

2018-10-29 Thread Marek Dziedzic via CnC-List 
Probably somewhat empirical number, but it has to change depending on the shape 
of the boat (the more beamy it is, the less it would sink with the same 
increase of weight), doesn’t it?

Marek

1994 C270 ”Legato” (quite beamy)
Ottawa, ON



From: CnC-List  On Behalf Of Jim Watts via 
CnC-List
Sent: Monday, October 29, 2018 21:51
To: 1 CnC List 
Cc: Jim Watts 
Subject: Re: Stus-List C 35-3 Actual Drive

Swiped off the internet:

POUNDS PER INCH IMMERSION (PPI):
The weight required to sink the yacht one inch.
It is calculated by multiplying the LWL area by 5.333 for sea water or 5.2 for 
fresh.
The PPI usually increases as the hull sinks into the water as the LWL area is 
also increasing
due to the shape of the hull above water.


Jim Watts
Paradigm Shift
C 35 Mk III
Victoria, BC
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Re: Stus-List C 35-3 Actual Drive

2018-10-29 Thread Russ & Melody via CnC-List 


I'm thinking it will be more like 5 & a half foot 
draft if floating in heavy water.


He might be floating in alcohol when checking the 
measurement. Not unlikely... being sailors and all. :)


Cheers, Russ
ex-Sweet, 35 mk-1


At 10:23 AM 10/29/2018, you wrote:


The boat was designed with a depth of 6’-5 inches in salt water.
If it were floating in fresh water it would sink 
.3”, so the draft would be 6’-5-1/2”

It takes 875 pounds to sink the boat one inch.
So if there is double that added since building, 
then the draft would be 6’-5” plus .3” plus 2” . . .

Total 6’-7-1/2”
Hard to believe 6’-10” – but maybe it was floating in heavy water . . .


Cheers,

Rob Ball
Chief Design Engineer  Tel 508-995-9711

http://www.edsonintl.com/signature/image001.gif


Edson International
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Re: Stus-List C 35-3 Actual Drive

2018-10-29 Thread Jim Watts via CnC-List 
Swiped off the internet:

POUNDS PER INCH IMMERSION (PPI):
The weight required to sink the yacht one inch.
It is calculated by multiplying the LWL area by 5.333 for sea water or 5.2
for fresh.
The PPI usually increases as the hull sinks into the water as the LWL area
is also increasing
due to the shape of the hull above water.


Jim Watts
Paradigm Shift
C 35 Mk III
Victoria, BC


On Mon, 29 Oct 2018 at 13:58, Richard Bush via CnC-List <
cnc-list@cnc-list.com> wrote:

> Rob; is the calculation of 875 pounds true for all boats or only the
> 35-3?   How would I find or calculate the numbers for my 1985 37 CB?
> Thanks!
>
> Richard
> s/v Byshmark4; 1985 C 37 CB; Ohio River, Mile 600;
>
> Richard N. Bush
> 2950 Breckenridge Lane, Suite Nine
> Louisville, Kentucky 40220-1462
> 502-584-7255
>
>
> -Original Message-
> From: Rob Ball via CnC-List 
> To: cnc-list@cnc-list.com 
> Cc: Rob Ball 
> Sent: Mon, Oct 29, 2018 1:24 pm
> Subject: Stus-List C 35-3 Actual Drive
>
> The boat was designed with a depth of 6’-5 inches in salt water.
> If it were floating in fresh water it would sink .3”, so the draft would
> be 6’-5-1/2”
> It takes 875 pounds to sink the boat one inch.
> So if there is double that added since building, then the draft would be
> 6’-5” plus .3” plus 2” . . .
> Total 6’-7-1/2”
> Hard to believe 6’-10” – but maybe it was floating in heavy water . . .
>
> Cheers,
> *Rob Ball*
> Chief Design Engineer  Tel
> 508-995-9711
> [image: http://www.edsonintl.com/signature/image001.gif]
> Edson International
> Email: r...@edsonintl.com [image: Edson -
> Home] <http://www.edsonmarine.com/>
>
> -Original Message-
> From: CnC-List  On Behalf Of
> cnc-list-requ...@cnc-list.com
> Sent: Monday, October 29, 2018 12:00 PM
> To: cnc-list@cnc-list.com
> Subject: CnC-List Digest, Vol 153, Issue 154
>
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Re: Stus-List C 35-3 Actual Drive

2018-10-29 Thread Richard Bush via CnC-List 
 Rob; is the calculation of 875 pounds true for all boats or only the 35-3?   
How would I find or calculate the numbers for my 1985 37 CB?  Thanks!
 
Richard
 s/v Byshmark4; 1985 C 37 CB; Ohio River, Mile 600;

Richard N. Bush 
2950 Breckenridge Lane, Suite Nine 
Louisville, Kentucky 40220-1462 
502-584-7255 
 
-Original Message-
From: Rob Ball via CnC-List 
To: cnc-list@cnc-list.com 
Cc: Rob Ball 
Sent: Mon, Oct 29, 2018 1:24 pm
Subject: Stus-List C 35-3 Actual Drive

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boat was designed with a depth of 6’-5 inches in salt water. If it were 
floating in fresh water it would sink .3”, so the draft would be 6’-5-1/2” It 
takes 875 pounds to sink the boat one inch. So if there is double that added 
since building, then the draft would be 6’-5” plus .3” plus 2” . . . Total 
6’-7-1/2” Hard to believe 6’-10” – but maybe it was floating in heavy water . . 
.    Cheers, Rob Ball
Chief Design Engineer  Tel 508-995-9711  
Edson International    Email: r...@edsonintl.com
        -Original Message-
From: CnC-List  On Behalf Of 
cnc-list-requ...@cnc-list.com
Sent: Monday, October 29, 2018 12:00 PM
To: cnc-list@cnc-list.com
Subject: CnC-List Digest, Vol 153, Issue 154   Send CnC-List mailing list 
submissions to     cnc-list@cnc-list.com    To subscribe or unsubscribe 
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Stus-List C 35-3 Actual Drive

2018-10-29 Thread Rob Ball via CnC-List 
The boat was designed with a depth of 6'-5 inches in salt water.

If it were floating in fresh water it would sink .3", so the draft would be 
6'-5-1/2"

It takes 875 pounds to sink the boat one inch.

So if there is double that added since building, then the draft would be 6'-5" 
plus .3" plus 2" . . .

Total 6'-7-1/2"

Hard to believe 6'-10" - but maybe it was floating in heavy water . . .


Cheers,
Rob Ball
Chief Design Engineer  Tel 508-995-9711
[http://www.edsonintl.com/signature/image001.gif]
Edson International
Email: r...@edsonintl.com[Edson - Home] 




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Sent: Monday, October 29, 2018 12:00 PM
To: cnc-list@cnc-list.com
Subject: CnC-List Digest, Vol 153, Issue 154



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