| Title: | SAILING |
| Notice: | Please read Note 2.* before participating in this conference |
| Moderator: | UNIFIX::BERENS |
| Created: | Wed Jul 01 1992 |
| Last Modified: | Mon Jun 02 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2299 |
| Total number of notes: | 20724 |
I heard several times that VAXes were used during the races of the AC to process data taken by a camera in real time to control sail trim to optimize the boat performance. Is there anyone, who can help me to get more details about hardware and software used, functionality and concepts, and who provided the software. I would like to use the information for a talk I have to give at April, 12, if the subject turns out to be suitable. Matthias
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1843.1 | Digi-draft? | MILKWY::WAGNER | Scott | Fri Mar 20 1992 13:33 | 12 |
I'll take a stab- down in RI a couple of guys rigged a camera/frame
grabber board/PC and digitized the draft stripes, basically. You could
get suggestions of draft placement, car position, vang etc. This story
is almost 10 years old, and cameras have gotten *lots* cheaper, so by
now you probably need to add strain gauges, accelerometers,
inclinometers and such to the equation.
Maybe a (big) sail loft can fill in some blanks?
Keep us updated- maybe I can work and sail yet!
Scott
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| 1843.2 | AKOCOA::DOUGAN | Mon Mar 23 1992 13:32 | 2 | ||
see note 1833
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| 1843.3 | See 1822.40 ! | BER::MENNINGEN | Thu Mar 26 1992 13:21 | 2 | |
Dan LeBlanc gave me the pointer to note 1822.40, thank you! Matthias | |||||
| 1843.4 | Top secret | EPS::SAMUELSON | Mon Mar 30 1992 11:33 | 12 | |
In Freemantle, New Zealand used tv cameras and VAXen along with very
large, black draft stripes on their sails. The cameras were mounted on
the mast. Matador2 uses PC's. Their cameras are mounted in the deck.
It is good for documenting sail shapes that are "fast" and then being
able to reproduce them. Many of the IACC programs are using this
technology now, primarily for the mains, since the size and complexity
of the tuning job is so huge. Neither North or Doyle have "embraced"
this technology from a sail design point of view. All the
implementations have been proprietary, and usually quite confidential.
(E.G., I wouldn't suggest calling Koch and asking him how it works or
about his results.) Although if you know some of the folks at MIT (I
don't) they may be willing to share some info.
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| 1843.5 | Medium Tech... the trailing edge! | MILKWY::WAGNER | Scott | Mon Mar 30 1992 11:49 | 16 |
Funny thing is, when I was trying to tune to my new North genny
2 seasons back, the North rep was on his back, on the foredeck, with
a Polaroid, taking pictures of my draftstripes! He said they'd be
marked up, then studied by Judd, then filed....?
And, Ive heard the North Fast course provides you a piece of clear
plastic (sail-scope?) to view your shapes with. Isn't this just the
non-automatic, old generation of the same thing the PC's are doing?
Between target boatspeeds, autohelms and computerized sailshape
advice, I can stay below and debug code on race day...
Just like work, kinda!
Instrument_Inadequate_Scott
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| 1843.6 | No Vaxen on NZ AC boats | PIHIA::ARLINGTON | Mon Mar 30 1992 21:17 | 15 | |
Re -.2 No vaxen where used in freemantle by the NZ challenge. They asked for some but didn't get any so they asked Hewlett Packard and they used theirs. They where used in the manner described with the draft stripes being checked against references marked on the deck. As an aside H-P are running advertisement around their involment in the AC. The Australiian boats used vaxes in freemantle in some capacity as did S+S. A vax2000 was used on the Whitbread Round the World boat Fisher + paykel that finished 2nd last time out. Cheers Revel | |||||