Moreton Bay Mob slap down the guantlet

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> 10 years ago

General Gps & Speed Waves Foiling Gear Reviews Lost & Found WA NSW QLD SA VIC TAS

nebbian

6277 posts

nebbian

WA, 6277 posts

18 Apr 2008 7:43pm

~~http://gpsteamchallenge.com.au/showsession.php?date=2008-04-18&team=6~~

They're well out in front now, although I saw some of the manbra blobs packing up so their posts could change things slightly.

decrepit

12887 posts

decrepit

WA, 12887 posts

18 Apr 2008 8:36pm

We're not going to affect things at the top, best we might do is go from 5th to 4th

elmo

8896 posts

elmo

WA, 8896 posts

19 Apr 2008 7:47am

Nice one guys, good to see your seasons finally started

sailquik

VIC

6173 posts

sailquik

VIC, 6173 posts

20 Apr 2008 1:23am

Yes but at the cost of a broken boom each and one destroyed sail for Craig.

I need to find a solution for broken booms besides just buying new ones. This is the third one I have destroyed since October last year and all have been the same size, 162-222. Again almost nothing to salvage on this one, maybe the rear end....
Then again if I could avoid hitting the bottom with my fin at high speeds it would help..... a lot!

I am going to have to have a talk with Tom Chalko about his breakaway harness lines.....

tim90

66 posts

tim90

WA, 66 posts

20 Apr 2008 12:06am

just a suggestion, sailquick, but perhaps try a MS boom or NP X9 (180-230or higher, for NP) They seem to be the best out there in terms of stiffness, and as far as I've heard/experienced, durability.

yoyo

1646 posts

yoyo

WA, 1646 posts

20 Apr 2008 5:46am

Andrew,
It puzzles me why something similar to a ski binding spring connection has not been designed for the boom head. Get Tom to work on that over the winter and he will make a killing selling them at the next speedweek in spring.

sailquik

VIC

6173 posts

sailquik

VIC, 6173 posts

20 Apr 2008 10:37am

tim90 said...

just a suggestion, sailquick, but perhaps try a MS boom or NP X9 (180-230or higher, for NP) They seem to be the best out there in terms of stiffness, and as far as I've heard/experienced, durability.

Well, I have considered the option of stronger booms but I know from experience that if it is not the boom that breaks it is the harness or harness lines or something else. If I beef up those parts I don't want that 'something else' to be part of my body!

sailquik

VIC

6173 posts

sailquik

VIC, 6173 posts

20 Apr 2008 10:42am

yoyo said...

Andrew,
It puzzles me why something similar to a ski binding spring connection has not been designed for the boom head. Get Tom to work on that over the winter and he will make a killing selling them at the next speedweek in spring.

Tom has been working on various ideas for breakaway harness lines for some time and has tested a number of different ideas. One of the difficulties is finding a way to set the breakaway force to the right magnitude. One obviously does not want them to break during any level of normal sailing, but you do want them to break before the boom or anything else. I think he has just about got it now.

25

319 posts

WA, 319 posts

20 Apr 2008 8:49am

We have relinquished it!
This is an official SRM call to arms!
That spot just past the bottom end of the new railway line.
Today - late morning / early arvo.
~~Dare I say it looks like it might be pretty good!~~. Probably better that I don't.
We need to work on distance, miles, alphas and hours.
Snides is leading the charge - packin his trailer as we speak!

nebbian

6277 posts

nebbian

WA, 6277 posts

20 Apr 2008 9:11am

sailquik said...

Tom has been working on various ideas for breakaway harness lines for some time and has tested a number of different ideas. One of the difficulties is finding a way to set the breakaway force to the right magnitude. One obviously does not want them to break during any level of normal sailing, but you do want them to break before the boom or anything else. I think he has just about got it now.

When sailing normally, you pull down on the boom.
In the 'whip' part of a catapult, you're pulling up on the boom. (That is, you're above the boom and it's trying to pull you into the mast/sail.) Surely that could be used to trigger the breakaway function?

Problem is finding willing volunteers to test it

Good onya 25, I knew you'd get fired up... if nothing else just to put that cocky pit crew back into their rightful place!

decrepit

12887 posts

decrepit

WA, 12887 posts

20 Apr 2008 10:11am

Nebs, surely by the time you're sailing thru the air, it's too late??????

nebbian

6277 posts

nebbian

WA, 6277 posts

20 Apr 2008 10:36am

Like jumping off a cliff, it's not the fall that kills you, it's the sudden stop at the end

If your harness line breaks as you're above the boom then you'll be thrown clear, like a trebuchet. If it stays connected then you whip around and smack into whatever's below you -- sail or mast. That's my thinking anyway, could be wrong...

yoyo

1646 posts

yoyo

WA, 1646 posts

20 Apr 2008 2:24pm

I had another look at Rob1 video of Antoine and Patrik's crashes on the canal. (Slow-mo at 3min mark)

Almost seems one of technique. Antoine doesn't resist and is thrown horizonatally forward , scimming on his back. Patrik is a bit more locked in and by the time he is out of the straps the mast is past the vertical on a downward trajectory and he just gets speared into the canal bottom.

It reminds me a bit of a Myth Busters episode where they tried to build a giant trebuchet using a crane but just speared the dummy into the ground. Need to release before the point of attachment of the harness lines passes the mastfoot. Beyond that , the only way is down.

sailquik

VIC

6173 posts

sailquik

VIC, 6173 posts

20 Apr 2008 6:29pm

Hmm, Hard to say what caused those dismounts.
I'll start a new thread about high speed crashes.......

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