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Old 16-07-2014, 14:38   #16
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Re: Sexual Orientation of her Flaps

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Originally Posted by SaltyMonkey View Post
They are very nice, but you should face the forward aft and the aft forward and the sideways left and the left sideways right, at least I learned this from Boaty.

And once you are done make sure no water can come in from a rogue walking the deck. I use a firehose with a wind machine.
i think that is what i will go with,as with the the anchor locker open it will give a wind profile something like this /...\..../....(front of boat)

photos of proposed bulkhead mounted hatch to anchor locker,and anchor locker hatch.
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Old 16-07-2014, 14:49   #17
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Re: Sexual Orientation of her Flaps

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Originally Posted by thinwater View Post
Forward. I have a cat and I can't imagine cabin top hatches facing aft. Bows and anchor lockers, yes for the same reasons as monos, but not cabin top. Do you really get spray up there with any frequency? At those times you will simply close them, since ventilation is not a problem in high winds.

Cats are different. Green water that far up on deck only happens when the hatches should certainly be closed.
good points,one other consideration is what would be the best configuration for downwind sailing?
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Old 16-07-2014, 16:41   #18
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Re: Sexual Orientation of her Flaps

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Originally Posted by atoll View Post
good points,one other consideration is what would be the best configuration for downwind sailing?
An air scoop in the aft stateroom, and the forward hatches pointing forward. The wind will act like a siphon to pull the air out from the forward hatches, and the scoop pushes it in in the back.
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Old 16-07-2014, 17:01   #19
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Re: Sexual Orientation of her Flaps

Forward of course, You want air flow...which means if you buy a boat in the EU you're going to have to turn them all around! I might leave one over the galley or well aft backwards to aid flow with t he boat shut at night.
My cat had them opening forward edge open. Both in the fore and aft stateroom. the wind would tunnel down each hull amazingly well and the boat was super cool when I needed it. If I need max air I would open the aft portlite in the aft state room to ease the pressure.
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Old 16-07-2014, 17:05   #20
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Re: Sexual Orientation of her Flaps

Hi, atoll,

Me offering you advice is a little like teaching grandma to suck eggs, I may be way out of my league here, but here goes:

1) aft cabins ventilation, needs to be on two sides, so no matter what wind direction you have you get flow through...ours is accomplished by an opening port about 2 -3 ft. forward of the head of the berth, and by two more opening ports (each about 18" x 10") that open into the cockpit, the principle allows cross flow under all condx. Harder to do in the cat, but maybe two small hatches at the head and foot of each berth? with the fwd one facing fwd and the aft, aft? You have 4 staterooms? That's a lot of hatches!
Maybe use dorades forward?

On another note, our forward hatch is forward facing and Jim and I designed a hatch dodger for it that allows us to keep it open even in wind and rain conditions up to about 25 k. It is a sort of modification of the dorade concept, so the rain can't make it in. If you're interested Jim'd probably take some pics and forward them to you.

Ann
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Old 16-07-2014, 17:16   #21
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Re: Sexual Orientation of her Flaps

Who'da thought this would be a tough decision. After careful consideration I can safely say, "I have no idea" but I would consider this...

- Anchor hatch brings in air when beating or on the hook.
- Forward deck hatch opens forward and is closed when beating or reaching - open when downwind as it is farthest from any flying spray coming from the rear
- Rear deck hatch faces aft and is open when beating or reaching as it is farthest from any flying spray coming from the bow

I have no idea if this is any better or not. I guess one has to try and imagine how ventilation will flow through the boat in any configuration.

Certainly a lot to be said about maximizing airflow on the hook and for that all forward facing is the go for that.
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Old 16-07-2014, 17:24   #22
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Re: Sexual Orientation of her Flaps

Quote:
Originally Posted by Ann T. Cate View Post
Hi, atoll,

Me offering you advice is a little like teaching grandma to suck eggs, I may be way out of my league here, but here goes:

1) aft cabins ventilation, needs to be on two sides, so no matter what wind direction you have you get flow through...ours is accomplished by an opening port about 2 -3 ft. forward of the head of the berth, and by two more opening ports (each about 18" x 10") that open into the cockpit, the principle allows cross flow under all condx. Harder to do in the cat, but maybe two small hatches at the head and foot of each berth? with the fwd one facing fwd and the aft, aft? You have 4 staterooms? That's a lot of hatches!
Maybe use dorades forward?

On another note, our forward hatch is forward facing and Jim and I designed a hatch dodger for it that allows us to keep it open even in wind and rain conditions up to about 25 k. It is a sort of modification of the dorade concept, so the rain can't make it in. If you're interested Jim'd probably take some pics and forward them to you.

Ann

i just fitted these 2 opening ports (65x17cm) in the aft cabins,and i have another 2 that i could fit on the outer sides of the aft cabin coach roof which should ensure a fairly good airflow,even with doors closed.

also as per the design there are 2 fairly large 40x40cm hatches at the back end of the aft cabins,though i have yet to source the hatches at a reasonable price,so might just go with what i have.

photos are of a similar "finished" prout,and the 2 ports i fitted today in the cockpit.
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Old 16-07-2014, 17:35   #23
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Re: Sexual Orientation of her Flaps

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Originally Posted by atoll View Post
good points,one other consideration is what would be the best configuration for downwind sailing?
Downwind? I don't think so. The forward hatches will be the exhausts at that point, the air entering the cabin through the main hatch.

I'm with the face-them-both-forward group; you'll want them to scoop the air in while you're on the hook.
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Old 16-07-2014, 17:43   #24
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Re: Sexual Orientation of her Flaps

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Quote:
Originally Posted by Ex-Calif View Post
Who'da thought this would be a tough decision. After careful consideration I can safely say, "I have no idea" but I would consider this...

- Anchor hatch brings in air when beating or on the hook.
- Forward deck hatch opens forward and is closed when beating or reaching - open when downwind as it is farthest from any flying spray coming from the rear
- Rear deck hatch faces aft and is open when beating or reaching as it is farthest from any flying spray coming from the bow

I have no idea if this is any better or not. I guess one has to try and imagine how ventilation will flow through the boat in any configuration.

Certainly a lot to be said about maximizing airflow on the hook and for that all forward facing is the go for that.
that would give me a profile like this ..\...../..../....front.
the only downside is to reach the forward deck hatch to close it in the event of a rain shower i would need to climb in to the fwd cabin .
as opposed to if it was aft facing the handels would be in reach from the saloon.

photo of a prout from inside with the same layout as i will have.
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Old 16-07-2014, 18:05   #25
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Re: Sexual Orientation of her Flaps

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Originally Posted by atoll View Post
Attachment 85102

that would give me a profile like this ..\...../..../....front.
the only downside is to reach the forward deck hatch to close it in the event of a rain shower i would need to climb in to the fwd cabin .
as opposed to if it was aft facing the handels would be in reach from the saloon.

photo of a prout from inside with the same layout as i will have.
That's what crew is for - "And while you're in there get me a beer..."

If the forward one is "fixed" by your desire not to have to go in the cabin then you could reverse the order but I think opening towards each other would be aesthetically "weird" to me for my taste.

Me personally, I would deal with the rain shower - Living in the tropics my goal is always to get max air on the hook. Underway settings and the rain showers would be a secondary consideration "for me" - YMMV.
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Old 16-07-2014, 18:12   #26
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Re: Sexual Orientation of her Flaps

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Originally Posted by atoll View Post

photo of a prout from inside with the same layout as i will have.
Gorgeous. It's going to be hard to go wrong with a boat like that. But I agree with Ex-Calif's sentiment about maximizing air while on the hook, especially in such a serious party boat.
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Old 16-07-2014, 18:21   #27
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Re: Sexual Orientation of her Flaps

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Gorgeous. It's going to be hard to go wrong with a boat like that. But I agree with Ex-Calif's sentiment about maximizing air while on the hook, especially in such a serious party boat.
i think i will have to sleep on it.....and maybe in it !

i could dry fit the hatches temporarily and post some photos of the various configurations for the forums perusal
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Old 16-07-2014, 18:54   #28
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Re: Sexual Orientation of her Flaps

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i think i will have to sleep on it.....and maybe in it !

i could dry fit the hatches temporarily and post some photos of the various configurations for the forums perusal
Good plan. Best with the usual bikini babes sunning on the foredeck.
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Old 16-07-2014, 19:06   #29
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Re: Sexual Orientation of her Flaps

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Good plan. Best with the usual bikini babes sunning on the foredeck.
lots of chicks hanging out on the boat at the moment..........

steal my sandwiches if you give them half a chance.............

and some of them have crabs.........................

but very good looking,if you don't mind beady eyes
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Old 18-07-2014, 04:59   #30
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Re: Sexual Orientation of her Flaps

Doesn't matter ... At anchor what is more important is type of wind scoop you use ... A baffled scoop will keep out the rain and provide heaps of airflow ... Check out
http://www.sailmagazine.com/everythi...ble-hatch-vent
We used something similar for years and were extremely happy


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