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multi stacking #231576
04/27/11 08:07 AM
04/27/11 08:07 AM
Joined: Jan 2009
Posts: 5,525
pgp Offline OP
Carpal Tunnel
pgp  Offline OP
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I've no experience with it. What works best?

I was thinking of 2 pairs 5' x 5' scaffold on a flat bed trailer, loading from the top down, using a pair of main sheet and blocks to lift bow and stern.

Last edited by pgp; 04/27/11 08:09 AM.

Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

-- Have You Seen This? --
Re: multi stacking [Re: pgp] #231579
04/27/11 08:44 AM
04/27/11 08:44 AM
Joined: Jan 2008
Posts: 3,655
Portland, Maine
T
ThunderMuffin Offline
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Portland, Maine
Pete,

There were plenty of double stacks going on at SF.

There are specialty trailers made for double stacking. You could build your own - but would probably spend more and not achieve results on par with the solutions already out there.

This weekend JC and I double stacked his C2 ontop of my N20. He had some custom fiberglass brackets that fit over my crossbeams that slso mated to trailer cradles. Strap them down and the rig was solid.

Re: multi stacking [Re: ThunderMuffin] #231581
04/27/11 08:51 AM
04/27/11 08:51 AM
Joined: Jan 2009
Posts: 5,525
pgp Offline OP
Carpal Tunnel
pgp  Offline OP
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I'm really thinking about a three high stack. Was one boat resting on another on your rig?


Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

Re: multi stacking [Re: pgp] #231582
04/27/11 09:01 AM
04/27/11 09:01 AM
Joined: Jan 2008
Posts: 3,655
Portland, Maine
T
ThunderMuffin Offline
Carpal Tunnel
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Yes, JC's F18 was riding (and still is, in front of his house) on the beams of my N20.

Which is fine, since the combined weight of me and my crew is more than the weight of an F18 and is unlikely to do any damage to my boat.


Re: multi stacking [Re: ThunderMuffin] #231583
04/27/11 09:17 AM
04/27/11 09:17 AM
Joined: Jan 2009
Posts: 5,525
pgp Offline OP
Carpal Tunnel
pgp  Offline OP
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Thanks Tad. I discovered that three empty, 12 oz. water bottles, with tops on, wrapped in a terry cloth towel, makes a very good cushion.


Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

Re: multi stacking [Re: pgp] #231586
04/27/11 12:15 PM
04/27/11 12:15 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
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Northfield Mn
I have a rack.

-Bottom boat sits on cradles facing forward.

-Middle boat sits on the rack on cradles.

-Top boat is flipped upside down and sits on a the middle boat beam to beam, also facing backwards. I make a simple frame out of 2x4's then pad the beams with some thin neoprene type material.

So far I've piled on about 4k miles with a triple stack like that and have had zero issues.


I'm boatless.
Re: multi stacking [Re: Karl_Brogger] #231591
04/27/11 03:20 PM
04/27/11 03:20 PM
Joined: Nov 2005
Posts: 5,582
“an island in the Pacifi...
hobie1616 Offline
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“an island in the Pacifi...
Originally Posted by Karl_Brogger
So far I've piled on about 4k miles with a triple stack like that and have had zero issues.

Did you beef up the axle?


US Sail Level 2 Instructor
US Sail Level 3 Coach
Re: multi stacking [Re: hobie1616] #231594
04/27/11 05:53 PM
04/27/11 05:53 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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Northfield Mn
Originally Posted by hobie1616
Originally Posted by Karl_Brogger
So far I've piled on about 4k miles with a triple stack like that and have had zero issues.

Did you beef up the axle?


Nope, just started with a proper trailer. I don't remember the weight ratings, but its probably a 5000# GVW trailer. Tandem axle, 20' deck, plus the V portion. I paid $1500 for it, and really regret not doing something like this sooner. It pulls nicely, and can easily handle the weight of three boats.

[Linked Image]

[Linked Image]

[Linked Image]

and with just a single F16:

[Linked Image]


Down side is it takes a solid vehicle to handle the windage. I could have made the rack shorter, but being that I dumped almost $2k on the rack and back mast support, and F16/18's aren't getting any smaller, I wanted to leave some room for growth so to speak. While it could be done with a 1/2 ton, I wouldn't want to tow it with one. Even with a hopped on diesel I'm getting at best 12-1/2mpg, and the bit better brakes and suspension is a nice piece of mind as well.

Last edited by Karl_Brogger; 04/27/11 06:02 PM.

I'm boatless.
Re: multi stacking [Re: Karl_Brogger] #231602
04/27/11 09:08 PM
04/27/11 09:08 PM
Joined: Jun 2001
Posts: 1,911
South Florida & the Keys
arbo06 Offline
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arbo06  Offline
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Posts: 1,911
South Florida & the Keys
Karl? You have a rack? How much did it cost you and are you really happy that you bought it?

My girl friend just bought a rack, it cost about $2K and works fine.

Eric


Eric Arbogast
ARC 2101
Miami Yacht Club
Re: multi stacking [Re: arbo06] #231620
04/28/11 07:52 AM
04/28/11 07:52 AM
Joined: Jun 2005
Posts: 302
Daytona Beach Florida
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orphan Offline
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Posts: 302
Daytona Beach Florida
To cut some cost find an old mast to make the rack. better aerodynamics and cheaper than buying aluminum.

Re: multi stacking [Re: arbo06] #231626
04/28/11 10:31 AM
04/28/11 10:31 AM
Joined: Dec 2003
Posts: 1,066
Wellington, FL-Singer Island, ...
cyberspeed Offline
old hand
cyberspeed  Offline
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Wellington, FL-Singer Island, ...
Eric,getting mighty upity with your second place class finish in the MKL. Congrats!


craig van eaton
Supercat 20
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Re: multi stacking [Re: orphan] #231629
04/28/11 10:39 AM
04/28/11 10:39 AM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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Posts: 4,118
Northfield Mn
Originally Posted by orphan
To cut some cost find an old mast to make the rack. better aerodynamics and cheaper than buying aluminum.


Too thin walled.


I'm boatless.
Re: multi stacking [Re: Karl_Brogger] #231630
04/28/11 10:47 AM
04/28/11 10:47 AM
Joined: Jun 2005
Posts: 302
Daytona Beach Florida
O
orphan Offline
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Joined: Jun 2005
Posts: 302
Daytona Beach Florida
If you are only supporting one boat on the rack there is more than enough strength. Thinner wall but larger diameter. For my tornado trailer(break down with hull above sail box on supports with cross sections) I used an prindle 16 mast for supports and a smaller oval mono section for the cross sections. And no problem at all for mast supports.

Re: multi stacking [Re: orphan] #231645
04/28/11 02:31 PM
04/28/11 02:31 PM
Joined: Jul 2008
Posts: 129
Austin, TX
BoK Offline
member
BoK  Offline
member

Joined: Jul 2008
Posts: 129
Austin, TX
Why not just use four pieces of high density foam? The bottom boat is tied to the trailer, the top boat has straps that run lengthwise around the fore and aft beams to hold the boat together. This worked just fine and no damage from Austin, TX to Key Largo, FL and back (about 3,200 miles)....

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Bo Kersey
Corsair 31-1D 276
Re: multi stacking [Re: BoK] #231646
04/28/11 02:40 PM
04/28/11 02:40 PM

M
MarkMT
Unregistered
MarkMT
Unregistered
M



Presumably this only works with two boats that are sufficiently similar for the beams to line up so there is no chance of fore-aft movement of the top boat.

Re: multi stacking [Re: Karl_Brogger] #231660
04/28/11 06:33 PM
04/28/11 06:33 PM
Joined: Jun 2002
Posts: 1,658
Florida Suncoast, Dunedin Caus...
catman Offline
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Florida Suncoast, Dunedin Caus...
Originally Posted by Karl_Brogger
Originally Posted by orphan
To cut some cost find an old mast to make the rack. better aerodynamics and cheaper than buying aluminum.


Too thin walled.


I think this reads.....wish I would have thought of that. grin


Have Fun
Re: multi stacking [Re: ] #231662
04/28/11 09:01 PM
04/28/11 09:01 PM
Joined: Nov 2002
Posts: 606
League City, TX
flumpmaster Offline
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Posts: 606
League City, TX
Originally Posted by MarkMT
Presumably this only works with two boats that are sufficiently similar for the beams to line up so there is no chance of fore-aft movement of the top boat.

I've done this with a Nacra 20 and Hobie Tiger where the spacing between the beams is different. We lined up the front beams and them made a spacer out of some 2 x 4s and hull cradles for the back. This worked for a 2,500 miles of driving too / from the Tybee 500 one year.


Dave Ingram is my president. tcdyc rules
Re: multi stacking [Re: flumpmaster] #231664
04/28/11 10:33 PM
04/28/11 10:33 PM
Joined: Aug 2007
Posts: 3,969
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brucat Offline
Carpal Tunnel
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Posts: 3,969
For one-off events, we have a ghetto version that works pretty well...

Once stacked a Hobie 16 on top of a Hobie 20, using 2x4s wrapped in bath towels as spacers (placed directly on top of the H20 hulls), from eastern MA to Madcatter (300+ miles each way). Used ratchet straps, tied the 16 directly to the trailer (used extra towels to protect straps from chafing the H20), no issues at all.

Mike

Re: multi stacking [Re: catman] #231693
04/29/11 10:29 AM
04/29/11 10:29 AM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
Karl_Brogger  Offline
Carpal Tunnel

Joined: Feb 2005
Posts: 4,118
Northfield Mn
Originally Posted by catman
Originally Posted by Karl_Brogger
Originally Posted by orphan
To cut some cost find an old mast to make the rack. better aerodynamics and cheaper than buying aluminum.


Too thin walled.


I think this reads.....wish I would have thought of that. grin


Nope. Made a mast crutch from a H16 comp tip cut off. Fail. You just don't have anything to weld to. Strength of the tube alone would probably be fine so long as it isn't cantilevered out too far from the vertical supports.

I'm a big fan of over engineering, I don't need to be cobbling something together at 3:30 am on the side of the road in the middle of No and Where with a look of concern on my face as to whether or not I'm going to get sodomized by some toothless local. Or worse, lol, dumping $35k worth of catamarans off of the top rack onto the interstate. I went with 3"x3", 1/4" wall square tubing, gusset'd and braced where ever I thought prudent, and I don't expect to ever have a single issue. If I were to do it again I might do round tubing, but the labor costs go up having to saddle each piece into the next. I'd probably make the choice based on what gave the most surface are to weld to.


I'm boatless.
Re: multi stacking [Re: Karl_Brogger] #231696
04/29/11 12:11 PM
04/29/11 12:11 PM
Joined: Jun 2005
Posts: 302
Daytona Beach Florida
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orphan Offline
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orphan  Offline
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Joined: Jun 2005
Posts: 302
Daytona Beach Florida
No welding. All done with thru bolts and support plates.

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