Cat 22

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OneWayTraffic
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Re: Cat 22

Post by OneWayTraffic » Tue Sep 15, 2020 8:21 pm

I know very little about cats, and was speaking in general about modifying plans.

Possibly it is to do with interference between hulls?



TomW1
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Re: Cat 22

Post by TomW1 » Tue Sep 15, 2020 8:40 pm

If you are looking for more deck space take out the locker forward of the helm. The frames there can be cut down to deck height like the ones behind the helm and there you go, 3 - 4 more feet of deck. If you need more locker area put it in areas out of the way. Make some copies and play with it. I have done it on numerous boats. Remember anything above the deck is moveable, all the structure is below the deck on Jacques designed boats.

You could put a seat in front of the helm with storage in it, if you feel there is 17" of standard seating room there and a walk way.

Well good luck.

Good luck with Sally it looks like she could be coming ashore right near you at the latest I saw. Hunker down and be safe!!!!!

Tom













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Last edited by TomW1 on Tue Sep 15, 2020 10:35 pm, edited 2 times in total.
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

cvincent
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Re: Cat 22

Post by cvincent » Tue Sep 15, 2020 9:17 pm

Jacques addressed why the box in front of the console may not be eliminated or cut down in this thread: viewtopic.php?f=6&t=63702&hilit=CT22+beam&start=30
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TomW1
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Re: Cat 22

Post by TomW1 » Tue Sep 15, 2020 9:50 pm

OneWayTraffic wrote:
Tue Sep 15, 2020 8:21 pm
I know very little about cats, and was speaking in general about modifying plans.

Possibly it is to do with interference between hulls?
The water is designed to flow between the hulls per the study plans. No interference at all. Cats are totally different than single hulls, OneWay. Two 90's and over 40 mph's. :D
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

Kenfyoozed
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Re: Cat 22

Post by Kenfyoozed » Wed Sep 16, 2020 12:37 pm

TomW1 wrote:
Tue Sep 15, 2020 9:50 pm
OneWayTraffic wrote:
Tue Sep 15, 2020 8:21 pm
I know very little about cats, and was speaking in general about modifying plans.

Possibly it is to do with interference between hulls?
The water is designed to flow between the hulls per the study plans. No interference at all. Cats are totally different than single hulls, OneWay. Two 90's and over 40 mph's. :D
I question the that performance based on the fact looking through the forum that at one time twin 50s were enough, then 70's and now 90s and even once suggested 115s. With out confirmation of a build and real world results at this point its all academics.

fallguy1000
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Re: Cat 22

Post by fallguy1000 » Wed Sep 16, 2020 12:59 pm

Kenfyoozed wrote:
Wed Sep 16, 2020 12:37 pm
TomW1 wrote:
Tue Sep 15, 2020 9:50 pm
OneWayTraffic wrote:
Tue Sep 15, 2020 8:21 pm
I know very little about cats, and was speaking in general about modifying plans.

Possibly it is to do with interference between hulls?
The water is designed to flow between the hulls per the study plans. No interference at all. Cats are totally different than single hulls, OneWay. Two 90's and over 40 mph's. :D
I question the that performance based on the fact looking through the forum that at one time twin 50s were enough, then 70's and now 90s and even once suggested 115s. With out confirmation of a build and real world results at this point its all academics.
I am building a prototype boat. Wife is worried it won't make her lines. We'll see.
My boat build is here -------->

viewtopic.php?f=12&t=62495

TomW1
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Re: Cat 22

Post by TomW1 » Wed Sep 16, 2020 5:39 pm

Kenfyoozed wrote:
Wed Sep 16, 2020 12:37 pm
TomW1 wrote:
Tue Sep 15, 2020 9:50 pm
OneWayTraffic wrote:
Tue Sep 15, 2020 8:21 pm
I know very little about cats, and was speaking in general about modifying plans.

Possibly it is to do with interference between hulls?
The water is designed to flow between the hulls per the study plans. No interference at all. Cats are totally different than single hulls, OneWay. Two 90's and over 40 mph's. :D
I question the that performance based on the fact looking through the forum that at one time twin 50s were enough, then 70's and now 90s and even once suggested 115s. With out confirmation of a build and real world results at this point its all academics.
JM came up with the same number and it is in the Study Plans on Page 4. I always like to check it to see if I get the same thing to help the builder over any hesitancy he has. I think you can trust the designer.
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

TomW1
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Re: Cat 22

Post by TomW1 » Wed Sep 16, 2020 5:46 pm

cvincent wrote:
Tue Sep 15, 2020 9:17 pm
Jacques addressed why the box in front of the console may not be eliminated or cut down in this thread: viewtopic.php?f=6&t=63702&hilit=CT22+beam&start=30
Thanks did not realize that was part of the beam structure. Forget what i said on removing the box to gain deck space Kenfyoozed.
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

cape_fisherman
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Re: Cat 22

Post by cape_fisherman » Mon Sep 21, 2020 8:15 pm

Deadrise at the transom works much like deadrise on a monohull. There is a difference. Ride on a displacement cat and then ride on a planing cat with some deadrise.

...AND...

When properly designed, cats WILL lean to the inside in a turn. They don't all turn flat or roll to the outside...

Kenfyoozed
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Re: Cat 22

Post by Kenfyoozed » Tue Sep 22, 2020 5:16 am

cape_fisherman wrote:
Mon Sep 21, 2020 8:15 pm
Deadrise at the transom works much like deadrise on a monohull. There is a difference. Ride on a displacement cat and then ride on a planing cat with some deadrise.

...AND...

When properly designed, cats WILL lean to the inside in a turn. They don't all turn flat or roll to the outside...
Tell me more about this inward lean. Will the CT22 lean in or out in turns. Leaning out is what is causing me to look at other non cat designs.

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