WE PUT GETAWAY WINGS ON A PRINDLE! :: Catamaran Sailboats at TheBeachcats.com

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WE PUT GETAWAY WINGS ON A PRINDLE!

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nohuhu

Rank: Mate

Registered: Sep 16, 2016

Last visit: Sep 10, 2021

Posts: 274
Posted: May 15, 2019 - 05:41 PM

I'll post it to youtube some day, so the meteorologists can pick at it. It was a small, rapidly moving patch of dark water on the already dark water. You can see it run into the boat from windward and WHUMP! within a second everything up was down...

Even with steady tradewinds, we do get some crazy wind events around the marine base. Often holes and sharp 90º shifts, even jet wash! There's also an area I call the Hawaiian Triangle, where the channel tides and winds converge to put everything on pause, just as you're trying to get over a big reef/marker.

It may just be the Navy testing its new Anti-Catamaran weapon system.

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Prindle 18
96734
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MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: May 16, 2019 - 07:58 AM

haha!
Go Navy
nohuhu

Rank: Mate

Registered: Sep 16, 2016

Last visit: Sep 10, 2021

Posts: 274
Posted: Jun 04, 2019 - 05:58 PM

YEEHAAW!!

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Prindle 18
96734
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ctcataman

Rank: Mate

Registered: Nov 25, 2015

Last visit: Jul 17, 2024

Posts: 661
Posted: Jun 12, 2021 - 06:13 AM

What kind of foam did you use for padding? How thick? How was it beld in place? Cover tension or cement?

I may pad my seats on a new-to-me Getaway.

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John

Nacra 5.0
CT
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charlescarlis

Rank: Mate

Registered: Jun 30, 2018

Last visit: Nov 21, 2024

Posts: 593
Posted: Jun 12, 2021 - 09:38 AM

padding helps a ton for comfort. I may end up with EVA on frame, covered by the tramp material just to have something, especially on long sails. Looking for options for some 1\2 inch to 3/4 inch, closed cell foam. And, will add soft drink holders at same time.

Following and looking...

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Chuck C
NACRA 500 Mk2
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gahamby

Rank: Mate

Registered: Feb 05, 2011

Last visit: Jun 15, 2021

Posts: 575
Posted: Jun 12, 2021 - 01:19 PM

This is Bill Roberts take on wing seats on Supercats.
"Wing seats are OK as long as you support the outer edge of the seat woth the trap wires. This way the sailors weight travels
the same path and goes directly to the pressure in the sail, same as if you were trap out without wings. Also the wing structure can be built out of lighter weight tubing with trap wire support. Now, a wing built out of lightweight Al tubing, 6061T-6 alloy, will weigh about 25 pounds each. So, you are adding around 50 pounds to the weight of the boat, That 50 pounds is there all the time. One cubic of water will support 60 pounds. If your boat weighs 50 pounds more than it did before adding wings, now every time it moves ahead one boat length the hulls must push aside almost another cubic ft of water. That is 12ins by 12ins by12ins more water must be displaced or pushed out of the way for the boat to move ahead one boat length. Adding weight doesn't come for free."

Edited by gahamby on Jun 12, 2021 - 02:51 PM.

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'82 Super Cat 15
Hull #315
Virginia
Previously owned: '70 H14, '79 H16, '68 Sailmaster 26, '85 H14T
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charlescarlis

Rank: Mate

Registered: Jun 30, 2018

Last visit: Nov 21, 2024

Posts: 593
Posted: Jun 12, 2021 - 03:32 PM

Touché, but the wings aren't about competition, are they? Just nice comfortable fun. Sort of like a sport sedan as opposed to a sports car.

Good info. to keep in mind for sailing dynamics though.

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Chuck C
NACRA 500 Mk2
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gahamby

Rank: Mate

Registered: Feb 05, 2011

Last visit: Jun 15, 2021

Posts: 575
Posted: Jun 13, 2021 - 03:42 PM

"Wing seats are OK as long as you support the outer edge of the seat woth(sic) the trap wires. This way the sailors weight travels
the same path and goes directly to the pressure in the sail, same as if you were trap out without wings."
This is the part of the quote I found most relevant.

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'82 Super Cat 15
Hull #315
Virginia
Previously owned: '70 H14, '79 H16, '68 Sailmaster 26, '85 H14T
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Edchris177

Rank: Chief

Registered: Nov 26, 2009

Last visit: Aug 10, 2024

Posts: 2531
Posted: Jun 13, 2021 - 09:22 PM

If I’m understanding the physics of load transfer correctly, that would only apply if the wings were free pivoting, supported only by the trap wires.
In order to do this, you would have to modify the wings, by removing the “leg” that goes from the wing to the outer edge of the hull.
I’m not convinced the quote is accurate. If you do a load analysis, say on the wire, yes, the wire pulls on the mast, but the entire forces get transferred to your feet, which are on the edge of the hull.
For wings,your sitting mass wants to pull the big tube upwards,
( pivoting on the smaller leg), but essentially, almost all the load gets transferred to the hull outer edge, via the support leg...in other words, the same as using trap wires to support the wing.
The trap wires are essentially taking some of the load the stays would absorb. You can see this while trapping in a lull, the stay goes slack, the trap wire taking the load.

Edited by Edchris177 on Jun 13, 2021 - 09:38 PM.

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Hobie 18 Magnum
Dart 15
Mystere 6.0XL Sold Was a handful solo
Nacra 5.7
Nacra 5.0
Bombardier Invitation (Now officially DEAD)
Various other Dock cluttering WaterCrap
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rch701

Rank: Mate

Registered: Jul 06, 2009

Last visit: Nov 01, 2024

Posts: 395
Posted: Jun 14, 2021 - 09:31 AM

Gahamby,
I made wings from H17 wings for my N5.2. They just slide in the beam ends. After the first big wave with two up I found them to be too flexible and they may have yielded a little. I ended up hooking an adjustable trap wire to the front corner of the seat.
I do not like this setup as it increases the number of wires to plow thru during a pitchpole. I plan to revise my setup to be more similar to the Hobie wings and get rid of the wire.
btw, my current setup is less than 25lbs per wing. Have not measured it yet, but the comfort increase on long trips is outstanding.

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FYC, Nacra 5.2 "Chris's Flyer" & Nacra Playcat & Farrier Tramp
Previously owned: Trac 14, H14, H16, H18, N5.0, G-cat 5.0
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gahamby

Rank: Mate

Registered: Feb 05, 2011

Last visit: Jun 15, 2021

Posts: 575
Posted: Jun 14, 2021 - 11:59 AM

Well Bill Roberts isn't around anymore to argue his point. If he was he would do so at length. The post is a direct copy and paste from his post on the Aquarius Owners Site.

https://owners.aquarius-s…ilit=Wing+seats&start=15

Page 2 post 6.

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'82 Super Cat 15
Hull #315
Virginia
Previously owned: '70 H14, '79 H16, '68 Sailmaster 26, '85 H14T
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ctcataman

Rank: Mate

Registered: Nov 25, 2015

Last visit: Jul 17, 2024

Posts: 661
Posted: Jun 16, 2021 - 04:55 AM

Any one use foam under the wing seat covers? What type and thickness?

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John

Nacra 5.0
CT
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MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Jun 16, 2021 - 08:17 AM

Quote"Wing seats are OK as long as you support the outer edge of the seat woth(sic) the trap wires. This way the sailors weight travels
the same path and goes directly to the pressure in the sail, same as if you were trap out without wings."

Probably talking about racing and attempting to minimize the difference between stock boats

we add trap-seats (wings) for comfort and space. been done for decades sans trap wire support.