Tri flip.

[Tranquilo]

http://www.youtube.com/watch?v=bMoHhilUSoU&feature=related

 

[Rondog]

Look at those whitecaps! I would not have flown a kite out there!

 

[Evo]

shoulda made sure the mainsheet wasn't cleated. doh

operator error....those boats have plenty ama volume

 

[left hook]

Ease!!!!!

 

[ProaSailor]

Great series of still photos, nice work! Besides easing the main, it looks to me like the solid canvas between the hulls, instead of netting to let the wind blow through, contributed to the flip? Might have recovered otherwise, around here:

But a video? With bouncy transitions? A slideshow of hi-res images would be better, eh? Oh, here's one at Flickr, but maximum image size is only 600 x 400? I haven't looked at Flickr images for awhile; their UI to see and operate the slideshow is surprisingly awkward and obscure:




show/" data-controller="core.front.core.autoSizeIframe" data-embedId='a527f96155df4198b583bfc428f40b7c'>

It wouldn't hurt to add a link to your Flickr.com page in the YouTube description?


Cheers

P.S. Wow! Surprised to see the embedded Flickr slideshow(s) in my post!? I just pasted these two urls into my text with no expectation other than links:

http://www.flickr.com/photos/picsbybrian2011/sets/72157627138533162/show/
http://www.flickr.com/photos/picsbybrian2011/sets/72157627138533162/

(using the "<>" code tag)

 

[Evo]

Great series of still photos, nice work! Besides easing the main, it looks to me like the solid canvas between the hulls, instead of netting to let the wind blow through, contributed to the flip? Might have recovered otherwise, around here:

unless they changed it that's a thick open weave. Still a tonne of windage as you say...especially if you don't ease the main

Elvstrom turned his one over by the bows...same cause

very cool little boats

 

[meanmachine]

i kept thinking : oh, yeah, just another broach. she'll come back up...but that's only lead-mines that do that, isn't it !



cheers,

 

[Pertinacious Tom]

shoulda made sure the mainsheet wasn't cleated. doh

operator error....those boats have plenty ama volume

Sure looked that way to me. At one point in the sequence, it looks like half of the port ama is submerged and holding the rest of the boat out of the water. That's enough floatation out there. If you ease the main...

 

[stranded]

vang ?????

looks like the boat did not want to go

looks more like the boat was

DRIVEN

and the solid canvas between main hull and float

once in the sky

finished things off

 

[Tranquilo]

shoulda made sure the mainsheet wasn't cleated. doh

operator error....those boats have plenty ama volume

Sure looked that way to me. At one point in the sequence, it looks like half of the port ama is submerged and holding the rest of the boat out of the water. That's enough floatation out there. If you ease the main...

Somewhere I have an old video on Kurt Hughes designs where he made custom amas for a Farrier boat. Then a scene with with two Farrier boats out sailing, the one with original floats was going fast and has lots of spray flying around the leeward float like they do, the boat with his floats, no fuss, no spray at all and going faster, smoother and smarter.

 

[narecet]

As Popeye would say, "How embarrassking..."

 

[Bill Gibbs]

Who wouldn't be hand holding all sheets on a multi, especially in those conditions?

As you guys said:

Dump the spin.

dump the main.

and the solid-looking wing nets didn't help at the end.

Isn't a capsize almost always crew error?

 

[Oxygen Mask]

shoulda made sure the mainsheet wasn't cleated. doh

operator error....those boats have plenty ama volume

Sure looked that way to me. At one point in the sequence, it looks like half of the port ama is submerged and holding the rest of the boat out of the water. That's enough floatation out there. If you ease the main...

^That. Dump the main.

More volume in the floats does not make more capsize resistance, in fact just the opposite. Being able to submerge the float gives you a chance to recover. Levering up and over a high volume hull - there's no coming back from that.

Moderate volume in the floats makes a nicer ride too.

vang ?????

looks like the boat did not want to go

looks more like the boat was

DRIVEN

and the solid canvas between main hull and float

once in the sky

finished things off

The nets are not solid at all.

And multihulls should not have vangs...

Somewhere I have an old video on Kurt Hughes designs where he made custom amas for a Farrier boat. Then a scene with with two Farrier boats out sailing, the one with original floats was going fast and has lots of spray flying around the leeward float like they do, the boat with his floats, no fuss, no spray at all and going faster, smoother and smarter.

I would love to see that!

 

[ProaSailor]

More volume in the floats does not make more capsize resistance, in fact just the opposite. Being able to submerge the float gives you a chance to recover. Levering up and over a high volume hull - there's no coming back from that.

Uh, no. Lower volume floats (amas) give you an earlier warning about a potential capsize, forcing you to back off earlier, but they certainly do not increase capsize resistance.

Moderate volume in the floats makes a nicer ride too.

Comfort has more to do with hull shape than total volume.

The nets are not solid at all.

They are obviously not open netting and definitely restrict wind flow compared to large diameter mesh:

 

[Evo]

More volume in the floats does not make more capsize resistance, in fact just the opposite. Being able to submerge the float gives you a chance to recover. Levering up and over a high volume hull - there's no coming back from that.

Uh, no. Lower volume floats (amas) give you an earlier warning about a potential capsize, forcing you to back off earlier, but they certainly do not increase capsize resistance.

Moderate volume in the floats makes a nicer ride too.

Comfort has more to do with hull shape than total volume.

The nets are not solid at all.

They are obviously not open netting and definitely restrict wind flow compared to large diameter mesh:

if they are the same as was used by Dragonfly a while ago they are nets....much thicker than anything you have pictured. The openings are far smaller in each cell.

That said...even what you have pictured is a truck load of windage when set as a sail. gotta keep that lee bow above the tide.....just

 

[Samin]

More volume in the floats does not make more capsize resistance, in fact just the opposite. Being able to submerge the float gives you a chance to recover. Levering up and over a high volume hull - there's no coming back from that.

Moderate volume in the floats makes a nicer ride too.

This is true I have owned and raced both high and low volume tris

 

[munt]

I vote for volume, though the low volume does give lots of warning, so what? It's still the same process. I can comfortably drive my m23 bow under too, difference being it will come back up faster and more reliably. If low volume is so great then why have corsair (with the dash) and Mr. Farrier (with the F-22) both opted for more volume? If you were driving hard downwind which would you rather be in, a sprint 750 or a dash?

 

[ProaSailor]

if they are the same as was used by Dragonfly a while ago they are nets....much thicker than anything you have pictured. The openings are far smaller in each cell.

That said...even what you have pictured is a truck load of windage when set as a sail. gotta keep that lee bow above the tide.....just

What's the argument here? If the 1 3/4" mesh pictured "is a truck load of windage", then the Dragonfly "nets" with openings that "are far smaller in each cell" are far more so, right? Like this example, found here: http://www.multihullnets.com/product/productmesh.htm

Square Hole Mesh
This is a very strong woven mesh with 1/4" wide fibers and 1/4" holes. It is coated with a heavy vinyl coating in white only. The openness of this mesh is slightly less than the Coated Polyester Mesh but it is twice as strong. This mesh comes in a limited width, so any nets with the narrower dimension of more than six feet would have to be seamed. All seams are double folded and covered.

By the way, larger volume amas give plenty of warning when the boat is pushed too hard, provided the driver knows how to read them. Not releasing the mainsheet appears to be the primary cause here, the extra windage of the fine mesh netting was secondary.

P.S. Here is a page discussing "Openness Percentage" of netting (Webbing Nets, Mesh Nets and Open Nets):

http://www.multihullnets.com/tech/techopennes.htm

The 1/4" Square Hole Mesh net pictured above is rated at 32% openness, compared to 75% for 1-1/2" Ultra Pro Polyester Open Net, pictured below:

Just for completeness, their Dyneema 1" Open Net is rated at 755 lbs/in, Openness: 69% (Grommet Border) to (76% Rope Border) - compared to 235 lbs/in for their 'Ultra Pro".

 

[gregj1]

can't tell from the photos if they were trying or not but, to never get the main released! I'm sure that happened pretty fast but still. Cut the damn thing if you have to.