Hiking Rack / Wing for Nacra Inter 20
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Posted: Apr 28, 2017 - 12:27 PM
Anyone have plans or ideas on how to add racks to a Nacra 20? Setting the boat up for another Everglades Challenge next year (March 2018) and would really like to have the convenience of siting on a rack instead of a harness for 300 miles. -
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Posted: Apr 28, 2017 - 12:46 PM
sure - get some smart fabricator to make you a set
both my mystere's are set up for my wings (i have set that i can swap on and off boats with 4 bolts
my beams were drilled (horizontally), a tube was welded into the beam that the wings pivot in for transit - when down they "rest/sit" with a pin on the beam caps - the front wing arms have a custom "1/2 cup" that rests over 80% of the beam cap and a pin goes through the wing "cup" and beam.
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Posted: Apr 28, 2017 - 01:19 PM
Lee W. had them on his 20 for the GT300. He has moved up to the Carbon20. PM me and I will put you in touch.
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Philip
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Posted: Apr 28, 2017 - 05:58 PM
MN3
Do you have any plans or close up pictures you could share? Thanks Sean -
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Posted: Apr 28, 2017 - 08:22 PM
Sean,
Got the PM. Sending you a text with his contact info.
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Philip
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Posted: Apr 29, 2017 - 12:06 AM
I had wings on a Mystere 6.0XL,(20' x 10' beam, basically a modern Tornado). They made the boat 13.5' wide.
They were modified Hobie 21 wings. My wife liked them so much she made me buy an H18 Magnum & won't get on the Nacra now.
It is easy to get the Hobie far enough up that the wing drags in the water. That was not the case with these. If you tipped far enough to dunk a wing you were going swimming.
One other thing I noticed. When in rough water, sitting on the wings, there is not much weight on your feet. At speed, boarding waves want to rip your lower legs off. The Mystere has big hulls, you are well off the water, but still, it was surprising how often the bows would cut a wave which then yanked your feet off the hull.
Whatever you build, make sure the tubes are sealed, otherwise, if you do flip, they will hold a ton of water. Hobie inserts a foam plug into the small bracing tubes, the large tubes are sealed, with no drains.
Not sure if this will help you, but I took some close ups of how they were mounted & put them in this album
https://www.thebeachcats.…387f59d3370a231a8fe1718c
Edited by Edchris177 on Apr 29, 2017 - 12:18 AM.
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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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Posted: May 01, 2017 - 11:30 AM
Edchris177 - so the only way to remove the wings for transport was to remove the end caps, remove the bolts and take the wings 100% off? -
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Posted: May 01, 2017 - 11:31 AM
I plan to drink rum and sail often... hope that helps :)
Oh ... nevermind - here are some pics
Edited by MN3 on May 01, 2017 - 11:40 AM. -
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Posted: May 01, 2017 - 05:18 PM
Thanks MN3. Looks great -
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Posted: May 01, 2017 - 08:46 PM
Not quite. I only took the end caps off in order to take the photo, to show how they were anchored inside the beam. The plate with the SS locknuts is captive inside the beam, so you just set the wing in place, hand started the bolts, then tightened with an allen key. I put them on solo, hooking the trap handle under the middle of the seating beam to hold them mostly in plcae while I did the bolts.
Yes, you had to remove the 4 bolts/wing, however, the upper wing could stay installed while on the tilt trailer, so in reality it was 4 bolt, lift the wing off & go. It is not as handy for a trailer sailor as the folding Hobie wings, but I keep mine in the backyard, fully rigged all season.
IIRRC they were 10'3" long, they came off a Hobie 21 I believe. The H21 set them into a pocket on the hull, so there was no pivot point, or small brace tube AKA H18 Magnum. In some ways they were better than the magnum wings. The geometry was such that if you ever drug a wing in the water, you were past the point of no return. The H18 wings drag pretty easy.
Original on H21 looked like this;
Edited by Edchris177 on May 01, 2017 - 08:48 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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Posted: May 02, 2017 - 09:26 AM
yw/ glad to help!
they are expertly made (and i keep scratching them and messing them up)
want to warn you about adding them - it changes your CE and changes the handling of the boat - it makes weight placement even more important (for my boat at least)
If i was to "order" them to be built custom - i would remove the back 1/4 or 1/3 of them. I NEVER sit there and it's just added weight and windage. I think i may use a bigger mesh on the wings when i replace the current tramp material (less windage)
feel free to ask any other questions -
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Posted: May 02, 2017 - 09:31 AM
oh yea, due to the 10' beam it sits on a tilt trailer = gotcha
they look great
PS my pivoting ones mean i don't have to remove (def a 2 person job for me) but securing them in the upright pos is a PITA - i made a pvc brace to prevent them from folding IN any more but they require a lot of rigging to ensure they can't move around during my 5 mile drive. adds 15 - 20 min of rigging / break down time
everything on a boat has it's pros and cons -
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Posted: May 02, 2017 - 08:02 PM
I looked at making some made for my I20 years ago. It looked straight forward enough to me. I have the abilities to build them but it was not going to be a cheap endeavor. I think you would pay $1-1.5K for a fab shop to build a set. Shouldn't be any real problem for them.
Edited by bacho on May 02, 2017 - 08:03 PM.
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Greenville SC
Offering sails and other go fast parts for A-class catamarans
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Posted: May 03, 2017 - 10:18 AM
I think the most challenging part is fabricating a working attachment system - and this "fab shop" better have a good idea of the forces and the directions of these forces.
I think you would be doing Very well if you get a set made for under $2000
$1300 - for these - wow pretty crappy looking - http://www.sitnsail.com/ (what stops the forward /backward sway of these?) -
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Posted: Nov 09, 2017 - 06:45 PM
Not crappy at all: http://www.sitnsail.com/SitnSail_Manual.pdf
At least take the time to review the documentation and educate yourself before making assumptions.
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Posted: Nov 10, 2017 - 05:06 PM
What makes you think i didn't look at your manual? OH you assumed i hadn't......
i saw it
To me:
This equipment does not look robust enough for my needs, nor does it look comfortable nor does it look safe
the seat width is way too narrow for me,
plus it is a solid bench - i would only fabricate / purchase a mesh wing (tramp material) seat - for comfort and reduced windage both upright and capsized
the lip on the bottom of the bench looks like it could decapitate or delimb someone in a pitch pole
this design looks like it will suffer failure in a common way - lack of sway support both forward and aft and up and down)
the support arms look like they are parallel to the front and rear beams (hard to tell from the images)but without any angle to them, there is nothing preventing forward and aft sway (except the attachment points). any time anyone does a hobie style beaching ... or pitch pole ... there are lots of stresses trying to sway that bench (i.e. rip off the attachment or bend the arms)
Hope i am wrong and your product is great and has many happy customers
Edited by MN3 on Nov 10, 2017 - 05:16 PM. -
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Posted: Nov 11, 2017 - 07:04 AM
What about this solution? M32 style studs in the rear and wires from the mast hound in the front. Though a little to wide in this case.
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Brgds
Lars
Frankentri 5.8/5.5/Inter20
Aerow trimaran foiler
https://www.facebook.com/groups/1192604934176635
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Posted: Nov 12, 2017 - 08:27 AM
looks good to me -
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Posted: Nov 12, 2017 - 08:35 AM
but i would still prefer regular wings over this i think
Edited by MN3 on Nov 12, 2017 - 08:36 AM. -
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Posted: Nov 15, 2017 - 03:48 AM
Since Revintage brought up a picture of our Inter 20 wings on Team Ketch Me if you Can for the 2017 Race to Alaska (facebook team page here), I figured I owed some more details on our wings and the research we did -- I had promised to do this a while ago but didn't get to it since the race in June...
First off, it's fair to say there are many ways to skin this cat, both looking at production and custom designs. Below are just some of the inspirations we used - I thought it would help to have them all referenced in one place.
(1) Hobie has various styles: see descriptions here and here (don't miss p2). Good pictures of a "Classic" Hobie 18SX wing assembly here. Note: this is older Hobie wings from Hobie sailing heyday, pre-Hobie Getaway era (short stubby wings).
(2) Nacra/Prindle wings: see on CatSailor here and here -- these look pretty flimsy to me (unsupported fore & aft, no upwards support via halyard, all loads concentrated in beam ends)
(3) Mystere 6.0 custom wings: see discussion on CatSailor (good info on Hobie wings too) and pics on this forum here
(4) M32 wings: see pics here and here
If you google "wings" on TheBeachCats, CatSailor and HobieForums, you get a lot more details, but it helps to know what to look for. The above cover a lot of the most common styles.
Edited by southstars2012 on Nov 15, 2017 - 03:50 AM.
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SL
Nacra Inter 20 (sold)
2017 Race to Alaska "Team Ketch me if u can"
- Facebook: https://www.facebook.com/TeamKetch/
- Race video highlights: https://www.youtube.com/watch?v=YTWp4DP0VcA
Sausalito CA
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