Alinghi Red Bull Racing Mast Break
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- Опубликовано: 29 сен 2024
- @alinghiredbullracing today suffered a catastrophic mast breakage. Fortunately all crew are reported as safe. We go frame by frame by frame on the incident to look at how the failure occurred.
Recon video and photos credit to Recon Photographer / @America's Cup
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#AmericasCup #AC37Recon #AC37
The Americas cup "organisation" need you as their tech spokesperson - head and shoulders above any other I can think of.
Yeah totally agree, you should be the technical commentator while they air it on tv.
The worst idea .... as soon you are part of this syndicate with all their lawyers and steadily legal fights about the rule books ... obviously you cant imagine how unpleasant such a job would be to sit between the chairs. No, no .... good journalism (as I am on my own part of) always keeps independent, to have the freedom for critics, objectivity. We have too many "yes sayers" without a straight backbone in this world.
I thought the guys down at the harbour in Auckland had that busy happy look this morning! New orders rolling in!
I think they will have made their own. It's not a one design part as far as I'm aware.
@@redgozza it is one design in shape and minimum layout, but teams can get whoever they wish to manufacture it. Super Spars made this one.
@@redgozza yes, but a lot of the teams order those parts down here. Apparently this one is from the UK. Must be why it broke.....
@@MozzySailsyou mean Southern Spars?
@@cesc1495 yeah, I do
For sure it’s a compression failure. Windward side of the mast failed under compression load and the center of effort in the mainsail pushes the rig forward and leeward.
Yep, carbon does not handle compression well, just ask those guys who operate that Titan submarine on trips down to the Titanic... oh wait... Sorry, never mind .
It would be compression failure leeward side, not windward. Mast is being bend towards leeward rear quarter, so leeward side is compressed, windward stretched. Compression failure on leeward side, like bending your left knee while leaning back, would cause bottom section to snap forward and to windward, while top section falls rearwards and to leeward - which I believe is what we see in the video, as the top of the mast wacks the water to lee of the hull.
Looks to me that either the sheet broke or it pulled out of the track. Once that was done it transferred the load higher up and the torque exceeded the strength of the mast. It's likely that the instantaneous loss of force at the area the mast was soon to break caused a rebounding that amplified the force shift upwards.
There's no way that CF mast is being repaired, it must be a right off. The upper section might be OK but they better go over that closely.
I think what happened is the angle between the top of the mast and mainsail rear is much larger than angle between top of mast and Cunningham. Both were loaded and the Cunningham wasn’t released when unloading the mast so the angle of load increased substantially which increased the load massively.
For example, imagine a rod sticking straight out of a wall with two wires coming off the rod anchored to the wall. One wire at 45 degrees and the other at 5 degrees. Hang a weight on the end of the rod and tension both wires. Now, cut the top wire. Either the bottom wire or the rod breaks. In this case the rod was the mast.
Just pushing equipment to the limit prior to racing unlike One Australia where the boat snapped in half and sank without trace. 😂
Yes I was there at the Windward Mark. 5th or 4th June 1995.
ETNZ sailed in conditions much more severe and it' came through . Could it be the design of the part was for the conditions forecast for Barcelona when the cup is being run ,or the designers git it wrong and tried to save a bit too much weight? Glad no one was seriously hurt or injured. This cup is already very interesting . I was amazed at how much the mast was flexing .
The Mediterranean isn't the milpond many people think...
I absolutely agree that it looks like the main sheet was released before the Cunningham. The fact the bolt rope came out of the track strongly supports that theory. I am a little surprised though that the Cunningham was strong enough to maintain enough pressure on the mast without first breaking itself. Cunninghams are normally quite small ropes due to their only task being to flatten the luff of the main and not carrying anything like the loads of say a sheet, halyard or stay?
disagree. i think the bolt rope is still 100% in the track. i think it’s a sail failure. it’s ripped alone the seam against the mast
I dunno, I reckon the explosion of the mast caused the mainsail track/bolt to pull away not vice-versa. The mast is quite straight prior to the mark and as you noted it bent back considerably as they rounded the mark. Whatever the case, they might be worried about the design philosophy.
The "D"mast section by design is very stiff and as you point out has quiet a lot of bend, I think more than it was designed for IMO.
Think you are spot on, the sail ripped away from mast and the rest is history.
As a kiwi, when I found out everyone was OK, a huge smile emerged.
This is to be expected, of course! If it doesn't break, it's too heavy!
And if it does break, add a teeny tiny bit more weight at juuuuuust the right spot.
If it breaks again, add just the smallest fraction of the tiniest part of a small thing's mass to it. :P
Rinse. Repeat.
Best possible outcome?
After crossing the line to win the series, the boat completely disintegrates and sinks immediately, leaving the winners swimming.
The fact the last AC boats from NZ are still sailing tells us the Kiwis made them waaaay too heavy. They should have been resting on the seabed for some time now.
Great day to be dropping masts…. I dropped my laser mast yesterday 😂
Have you seen Taiahoro sailing in 30 knot winds.amazing
Was Sergio Perez driving 🤣
Thanks Mozzy!
Is there a join in the mast at that point in the mast. Looks cut not broken
What are the rules around quota's and replacements? Seems like if they submitted their designs and manufacturing process they should be able to have replacements without counting towards theil quota.
What if they need to stiffen it?
Reminds me of when team nz broke there's in 2003
If Christian Horner had anything to do with the design, it likely had too much flex at high speed 😂
Wow lucky no one in the way of that 😮
When these things happen you end up with a number of failures and you have to work out the sequence of events to find the primary failure. The video and the accounts of the crew are important as is analysis of the failed sections. Good luck to the guys doing the failure analysis. It will be interesting to see what they come up with!
The shroud aero on those late IACC boats is cool to me for some reason. Cool to see Alinghi pushing the limits.
Track failure, more glue huh. No Ds? Maybe change the cunningham to a red rope. Or button 🔘
A bit more plexus should fix it...
Was that a mast built by Oceangate !!!!
and this morning another disaster :-( they have lost the rig again
I know... they're not having a good time. Looks like the other rig broke in a similar place
that's the sail bolt still in the track, the sail ripped along the bolt. it looks like the bolt rope is still in the track.
yeah, could very well be
@@MozzySails more i think about it and this is a sail design/ construction failure. probably caused by the cunningham issue you describe. the load shift when the sail rips causes the mask break
Very clean brake!
This grainy view may be the best position to be in.
Thanks Mozzy!
Perfect timing, just watched the LVC video on the mast snap
Wow, you are here FAST!
Wow thats one agro force of strain that mast succumbed to.Best wishes & hope all comes right for team alinghis waka for the Americas cup.Kia kaha team alinghi.
Did you get an update on the cause?
I like your points on the sail failing at the bolt rope.
I am wondering what the torsional loads would be if the rope failed on one of the skins before the other. The differential loads both in compression and in torsion would be immense as the load on one skin would rapidly go to zero while remaining high on the other side until failure.
Looking at the failure all I can think of is the trick of standing on an aluminum can and then giving it the tiniest flick and watching it fail.
I had a new sail made to S80 keelboat .
The sailmaker put 5 mm boltrope it should have been a 6 mm boltrope .
On a windy day, the sail parted from the mast track the shift of power of the sail, almost instantaneously ,acted like someone had yanked the backstay on so hard that it snapped ,the mast, bye bye mast
The best mast had on my S80 🙈
This footage reminds me exactly what had on that day, so yeah sail parting from track is my guess.
> like someone had yanked the backstay on so hard that it snapped the mast
Nice explanation, looks like it corresponds with Mozzy's glimpse of the light between sail and mast.
Using that $2.60 glue on special didn't work out!
Did the forestay fail?
That was my first thought as the jib blew off before the mast buckled but I suspect Mossy is right (of course!) and the extreme mast bend pulled the forestay out as a result. Huge loads and carbon isn't forgiving. I wouldn't fancy being a rig designer on these machines.
Buckling failur.
TNZ failure was TinCup Rod failure at the V1 Shroud, 1st spreader connection.
Could’ve killed a guy easy…hopefully these guys follow there design philosophy and push forward and be competitive.
I think you will find the shot of Team New Zealand snapping it's mast was because it's design envelope was exceed, this was brought about as the sea state caused more water to come in the back of the boat creating extra weight so put strain above it's design tolerance so rigging and attachments failed before the mast failed.
Interesting that the light showed through, indicating that BOTH luffs pulled out. Probably one before the other if that splintering damage on the mast close up is anything to go by?
The break looks quite clean, is there a joint at that point in the mast?, would this potentially cause stress concentrations and an opportunity for failure. Also, if this was a joint, then the track fixing may be suspect at that point which if it started to pull away may just have been enough. Another possibility might be the mast failed to rotate during bear away which transferred loadings more across the section?.
Brilliant analysis. So valuable for the whole fleet. Thanks!!
I immediately thought of the Alinghi V NZ race! 🙄👀😮
Are they using forestay or jib halyard for main sheet shape? Makes more sense than cunningham.
Red Bull, doesn’t give you wings. Gives you creaks and groans and exploding masts.
The masts are all one design, so this could be bad for the cup.
Sends one to am early grave if one drinks too much....
@@GGxKiwi The shape, dimensions and minimum composite lay-up specs are mandated, otherwise it's open.
I had a friend who had the gooseneck on a mast arm let go when pulling up an underwater oil hose , and some deck gear hit him in the back. He no longer works, and s now a raging drug addict, after buying a few small income properties from the lawsuit settlement. . .
Rigging failure? Do these freakish boats have shrouds? Looks like the Jib stay let go, but upon closer examination, the mast buckled which is pretty weird. Let's get back to real sail boats.
Who's next? Better now than later.
Or the sail ripped. Leaving the "sail guidence " (dont know the name) still in the track and the "splinters" is really ripped cloth?
yeah, that could also be the case (p.s. bolt rope I think is the term you're looking for)
Excellent analysis
American magic guys better start practicing raising their arms for lifting that cup when time comes.
They damaged their boat too a few days ago. Don't think they are going to be raising anything for a while except their budget.
You can't say nobody's hurt .. really not that stupid aye?
Red Bull have confirmed everyone was safe, so that's what I said in the video
@@MozzySails Literally Unbelievable
I am curious about what the mast is made of, the break doesn't look symptomatic of carbon, or aluminium except for the dents near the break. And as usual thank you for for your in-depth look at what makes high end yacht racing interesting.
they are carbon
unidirectional fibre is the outer skin which is why it looks like that.
@@jakeparker8254 It obviously makes sense that it is carbon, but I have never seen carbon fail quite like that, so clean, like titanium.
Can’t wait to see our TeamNZ in those conditions. It’s going to be exciting.
Are the swiss really playing in the big boys pond
Agree with you on all points, look how quickly the forstay/jib luff goes soft. That mast was under a lot of compression when it failed.
I wonder if the sail failed at the luff, right up against the mast behind the bolt rope. It's possible the track is still on the mast with the bolt rope in it, but the rest of the sail ripped away. Its hard to see on the images.
Looking at the bottom section, it looks like the sail ripped just behind the bolt rope. Obviously this would have had to happen halfway up, but if it did, it would have the same effect as the bolt rope pulling out.
Where you point out the serrated trailing edge of the mast section, it could be horizontal sail fibres that are stitched into the bolt rope
this mast its gone...
Swiss getting what they was smiling decades ago.
Now they are blady busy find why and where its problem....
Build only a new stronger mast mostly not mutch help.
Bring back the 12 meter yachts. Screw these carbon hyper skiffs!
Formula 1, carbon fibre, computers, zzzzz..
Ok Boomer.
@@mkat_551 😉
The Swiss sailed with a lot of hanger for this type of mast…Italians too but the technical mastery is différent.⛑️🤥