[Public-list] aft deck vent location

[Glenn Brooks]

Hi Roger,

We have two 4"  rubber cowl vents on the aft deck of 'Dolce'.  Both are 
set  perhaps  a bit over midway between the main sheet traveler and the 
taff rail perhaps 8-10 inches from the side rail--sort of symetrically 
equal distant on each side of the boat.   They don't interfere with the 
main sheet at all, as our mainsheet  leads forward to the mast and back 
to cleat down over the stbd aft side of  the cabin top--much better for 
single handed work!

Last weekend we had the midship lifeline bases in the water for most of 
a day,  bashing around on Puget Sound and took no water through the aft 
vents. Its easy to remove the flex rubber cowling types and screw in a 
deck plug , if need be.  Also,  I  like the flex style as they will get 
stepped on and generally banged about without any damage to them or our 
crew ( me generally).

Incidentally, the rear vent locations are strategically situated to be 
able to reach in and mess around with thru-hull fittings/exhaust hose 
clamps etc on the transom and hull.-- which can't be reached through the 
rear hatch very well.  So I like them out there in the middle of the old 
Qdeck.

regards

Glenn Brooks
Dolce

Roger L Kingsland wrote:

>A30 Somethings,
>
>I have 2-3" SS cowl vents I plan to install on the aft deck of #148 to ventilate everything aft of the cabin. They look to be about the size of those on Encore (only about half again taller) visible on the cover of the 2005 A30 Directory.  Looking at other pictures of A30s, it seems the stern pulpit (is that a pushpit) makes a good seat at anchor and the aft deck works well as cockpit overflow space so I would like to put the vents where they won't be in the way.  
>
>I wonder if just aft of the main traveler might catch the main sheet on tacks/jibes, particularly since my vents are rigid (unlike Encore's which look to be flexible plastic).  The ideal place relative to my ventilation plan would be outboard and aft under the side railings of the pulpit.  That location would also keep deck space open and the pulpit might fend off loose lines that could catch on the vents.
>
>Only problem with this location is, when the boat is well healed (from a tipping perspective, not medical or financial),the vent facing forward might scoop water instead of air?  Thus the question, does anyone know, when the deck amidships is underwater (IE, caught in a squall w/ sails still up), if the aft, outboard corner of the deck is also under water?  I suppose, in the conditions I describe, most crew members have more pressing concerns than observing the relationship between the water and poop deck but, any feedback / opinions would be greatly appreciated.
>
>I have also considered just aft of the lazarette hatch flanking either side of the back stay.  This would look real shippy but I might hinder proper operation a pulpit mounted "barbie" and would probably preclude installation of a stern boarding ladder.  Any thoughts on this alternative?
>
>Thanks so much,
>
>Roger
>
> 
>Roger Kingsland
>Managing Partner
>KSBA Architects
>N40°- 27.83'  W79°- 57.99'
>
>(412) 252-1500 x101 office
>(412) 779-5101 cell
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