| Making racks / wings #274206 07/26/14 03:50 PM 07/26/14 03:50 PM |
Joined: Jun 2001 Posts: 425 Toledo, Ohio (western end of ... Mike Fahle OP
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Posts: 425 Toledo, Ohio (western end of ... | I know this has been discussed before but I cannot find any useful info using the search function so I need a little assistance. I am happy to do my own design work, I'm just looking for these things: Specifically I would like to know the measurements that a Hobie 18 magnum wing/rack extends from the side of the boat AND above the deck (I had one for many years so I am familiar with how it sails), how wide the actual sitting portion is, and also how much one weighs for reference. Last, does anyone know a good website to determine deflection for aluminum tubing of various dimensions? Thanks!
Last edited by Mike Fahle; 07/26/14 03:52 PM.
| | | Re: Making racks / wings
[Re: Mike Fahle]
#274240 07/28/14 09:57 AM 07/28/14 09:57 AM |
Joined: Jun 2002 Posts: 1,658 Florida Suncoast, Dunedin Caus... catman
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Posts: 1,658 Florida Suncoast, Dunedin Caus... | I know someone who has Magnum wings. I'll talk to him today and see if he can measure for you.
I had magnums on my 18 and I believe both wings with the mounting hardware and vinyl covers installed were 36-38 lbs.
Last edited by catman; 07/28/14 10:04 AM.
Have Fun
| | | Re: Making racks / wings
[Re: Mike Fahle]
#274387 08/04/14 02:42 PM 08/04/14 02:42 PM |
Joined: Jun 2005 Posts: 302 Daytona Beach Florida orphan
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Posts: 302 Daytona Beach Florida | Mike, I took a set of H18SX wings and fit them to my M6.0. Dilled out the rivets for the rear crossbar support and reriveted correct distance between front and rear cross bar. Bent and cut the rear support leg and cutoff and rewelded the front support leg. Much easier than building an entire set from scratch. [img] http://thebeachcats.com/pictures?g2_itemId=109253[/img]
Last edited by orphan; 08/05/14 09:06 AM.
| | | Re: Making racks / wings
[Re: TeamChums]
#274398 08/05/14 07:09 AM 08/05/14 07:09 AM |
Joined: Jun 2001 Posts: 12,310 South Carolina Jake
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Posts: 12,310 South Carolina | Very cool...I guess with the Nacra 20 class not really being a class anymore, that kind of mod really makes sense. Did you do the GT300 with the wings? From a design standpoint, having the wings be self-supporting does make things simpler to operate but it changes the rigging loads (the shroud now supports the extra leverage instead of the trapeze wires) and adds slightly more weight (very slight). I'm sure that there is plenty of extra load carrying ability in the shrouds for that - but using the trap wires to support the wing instead of bracing it back to the beam will stay closer to the original loading configuration. On the other hand, you would have to rig up some other trapeze configuration in order to trap off the wing...and a wing that doesn't have the bracing to keep it in place, might fold up on you... huh. So, yeah, nevermind. Looks great.
Jake Kohl | | | Re: Making racks / wings
[Re: Jake]
#274411 08/05/14 09:49 PM 08/05/14 09:49 PM |
Joined: Aug 2007 Posts: 1,304 Gulf Coast relocated from Cali... TeamChums
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Posts: 1,304 Gulf Coast relocated from Cali... | There are braces that go from the end caps to under the inner most tubes. I'll post pics of them when I get it rigged up this weekend. We will be trapping off of them and rigging up a chicken line system for an open ocean race in Ventura on the 16th. We'll run them next year in the GT. I'll be making an adjustable tension shroud/back stay from Vectran/Amsteel on each side that goes to each wing. You can see the overbuilt tab on the cross beam cap (little triangle) for the under support (not shown) which is made out of 1" tubing (later to be replaced with Carbon tubes as well). Thanks Jake. It's been fun designing them and finally making them. Complicated to explain how the outer bar will be replaced with Carbon but I'll take lots of pictures. https://fbcdn-sphotos-f-a.akamaihd....3121200_234f3dfbb55aa08a3bec68d02ce37d42https://scontent-b-lax.xx.fbcdn.net...03180013199664_5573179264306061282_n.jpg
Last edited by TeamChums; 08/05/14 10:07 PM.
Lee
Keyboard sailors are always faster in all conditions.
| | | Re: Making racks / wings
[Re: TeamChums]
#274418 08/06/14 09:40 AM 08/06/14 09:40 AM |
Joined: Jun 2001 Posts: 12,310 South Carolina Jake
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Posts: 12,310 South Carolina | I see you didn't forget the cup holders! Did you beef up those rear beam bolts from inside the hull? You're asking a little more out of them with the extra righting leverage and they have proven to not quite be up to the task in the original configuration. How much weight do you think you will save with the carbon vs. aluminum?
Jake Kohl | | | Re: Making racks / wings
[Re: Jake]
#274425 08/06/14 07:17 PM 08/06/14 07:17 PM |
Joined: Aug 2007 Posts: 1,304 Gulf Coast relocated from Cali... TeamChums
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Posts: 1,304 Gulf Coast relocated from Cali... | 2 years ago I had the boat completely sanded down and painted instead of gelcoat. At that time I had the place lay up the beam sockets with carbon to beef them up. Not sure what weight savings yet but I will when they're done. I guess I'll find out more from whoever I order it from. Those aren't cup holders. They're to reduce windage.... ![wink wink](/forum/images/graemlins/default/wink.gif)
Lee
Keyboard sailors are always faster in all conditions.
| | | Re: Making racks / wings
[Re: TeamChums]
#274428 08/06/14 08:57 PM 08/06/14 08:57 PM |
Joined: Jun 2001 Posts: 12,310 South Carolina Jake
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Posts: 12,310 South Carolina | If you've got any pictures showing the detail of the bracket that attaches to the beam, I would really like to see it. I've been thinking about doing something like this to the F18.
Jake Kohl | | | Re: Making racks / wings
[Re: Jake]
#274446 08/07/14 09:25 AM 08/07/14 09:25 AM |
Joined: Dec 2001 Posts: 5,590 Naples, FL waterbug_wpb
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Posts: 5,590 Naples, FL | so what's the max beam with the wings?
Jay
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