Maltese Falcon ... hit or miss?

[Doug Lord]

Originally Posted by Guillermo

I think a careful reading of this paper may clarify MF's design aspects and performance. There is an interesting VPP comparison among the different rigs.

http://www.hiswasymposium.com/assets...20Dijkstra.pdf

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Guillermo, thanks very much!! There was a problem connecting to the PDF so I couldn't download it-did anyone else have a problem??

UPDATE: 8:48pm- just tried again and it worked perfectly.......

[CutOnce]

No problem with downloading the PDF here in Canuckistan.

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CutOnce

[Angélique]

The link to the PDF of the Maltese Falcon Hiswa Symposium was also in post #271 by Tad....downloading it from the link wasn't a problem for a while....later the link didn't work and now it's available again....so I stored it and tried to attach it here so it stays with the thread....

But the upload has failed and I got this message, twice...

Your submission could not be processed because a security token was missing or mismatched.

If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error.

Maybe someone else who has stored it, or get it from the web while it's available, will try to attach it here or ask the Moderator to fix it . . . . . .

Cheers,
Angel

[CutOnce]

PDF is 12.8 megabytes and the PDF upload limit on this site is 10 megabytes. Sending a file bigger than the 10MB limit results in the security token mismatch. I tried zipping the file but it was still 11MB.

I've got the original file and would be willing to send it to anyone requesting via normal email (although many providers limit attachment size as well). PM me and I can send it as long as you provide a regular email address.

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CutOnce

[Angélique]

I've flagged my above post #303 for the Moderator and asked him to attach the PDF here....

Maybe he can get it from the web and will do so . .

Cheers,
Angel

[ancient kayaker]

The pdf opened OK for me today although not on the day it was posted. I finally got to see the tacking procedure, which has intrigued me for a while.

Before my health problems I was considering making a tiny dynasail for experimenting - there was another thread describing plans for something similar a while back. I doubt a small sailboat would have enough momentum to complete a change of tack, wearing or boxing would be quicker in a small, nimble craft. I had planned a single telescopic mast with a spar attached to the top of each section, which could be lowered in seconds - needed as there are a couple of low (as in "watch your head") bridges. I don't think it is going to happen now although I have most of the material.

[Boat Design Net Moderator]

Sorry for the rather cryptic error message; that is happening because the server is set to give up on a connection after either too large an input size (10 MB) or too long a duration (5 minutes) to prevent any hanging processes from impacting performance overall.

The PDF in question is loading fine for me now from their site at http://www.hiswasymposium.com/assets...20Dijkstra.pdf
so I won't do anything for now, but if it goes down again I could contact them and ask permission to mirror the PDF.

[Angélique]

Above PDF is from the Hiswa Symposium #18 in 2004, here some more Hiswa Symposium papers about the Maltese Falcon.....

This one is also from the #18-2004 symposium: (PDF, 1.98 MB)
• The use of fibre optic strain monitoring systems in the design, testing and performance monitoring of the novel freestanding Dynarigs on an 87m SuperYacht by Perini Navi, design by G. Dijkstra.

From the Hiswa Symposium #17 in 2002: (PDF, 3.14 MB)
• Optimization of yard sectional shape and configuration for a Modern Clipper Ship.

The Hiswa Symposium papers from #13 in 1994 till #21 in 2010 can be found here, I'll guess the list will make progress in 2012..

Cheers,
Angel

[Angélique]

Originally Posted by Angélique

Transatlantic Race 2011 and Beyond!

the Falcon broke her own 24-hour mileage record with a 405nm day

Just saw.., SailDesign has some pics of MF at the start of that race in his gallery...


click to enlarge


click to enlarge

Cheers,
Angel

[brian eiland]

The early portions of this you tube video show some of the sail handling gear in action, and a few model, and small vessel experiments in tacking:

http://www.youtube.com/watch?feature...&v=KZoS93qkZHw

...don't think I'd seen this before

[brian eiland]

Originally Posted by brian eiland

Perhaps there are some lessons here?

BRIGS AND POLACRES WITH WINDWARD ABILITY
(Improving the sailing qualities of square rigged ships)
Philip Goode, A.M.R.I.N.A., I.Eng.
http://www.yachtingdirect.com/white_papers/philip_goode/weatherly_square_riggers.htm

I had previously posted this reference discussion by Philip Goode on 'weatherly square riggers'.

Just today I ran across his discussion of a 'stayed dynarig':

Most practical proposals for sailing cargo vessels today are based on the Dyna-rig developed for that purpose in Germany in the 1960s and brought to outstanding culmination in the rig of the 2007 built Maltese Falcon. This rig is based on a rotating mast, the yards being fixed to the mast and rotating with it. This means that the masts had to be unstayed, leading to enormous cost not only in the bearings at heel and deck partners, but also in producing a spar strong enough to bear the bending load.

What brings Goode’s design into the realm of commercial viability is that, instead, it utilises a rotating mast stepped on deck and supported by wire rigging. The spar can thus be much lighter and, aside from a thrust bearing at head and heel, there are three simple bearing collars along the mast’s length. Practical experience of the 226gt sail training vessel Pelican of London has shown that lateral staying of the mast can be safely carried out by backstays which are anchored much further aft than usual and do not hinder horizontal yard swing until the yards reach 20º from ship’s centreline. Because none of these backstays hinder the yards, there can be as many of them as required. Even the conventional lower shrouds, which would normally be in the ship’s transverse plane, can be replaced by backstays to the lower hounds.

...more here...
http://www.motorship.com/features101...te-green-ships

[brian eiland]

http://www.youtube.com/watch?v=5_Xa8...layer_embedded

[brian eiland]

Originally Posted by brian eiland

Recently there has been some interesting model testing with DynaRigs on Proas at YouTube videos:

http://www.youtube.com/watch?v=8NO385N9sqU

http://www.youtube.com/watch?v=fIm3DpxDzJ4

http://www.youtube.com/watch?v=nYLkV4yOBcA

http://www.youtube.com/watch?v=xJBzk5b3b7o

Originally Posted by rob denney

G'day,

Thanks to the results we gleaned from the models in the videos. it looks like I will be putting a dynarig on my 16'/5m proa, currently being built in the garage. Originally designed for a windsurfer rig, I will set it up for both and let you know the results, hopefully before Xmas.

regards,

Rob

Regrettably someone has removed most of the videos from youtube.

This is exactly why I sometimes hate to LINK to sites, photos, and articles on the web that are just going to disappear....not very fair to subsequent readers.

Seems like it if you want to make a more permenant link you need to post the text and the photo into the forum body.