DynaRig MotorSailer, ala Maltese Falcon

[brian eiland]

"Sail, the historic implement of world exploration, has within itself many new horizons that beckon for pursuit, but you have to be willing to venture past charted waters." - Gary Hoyt

This quote from Gary Hoyt has never been more illuminating than today, when I introduce a new motorsailing design that sports 'another unusual sailing rig'. An inventive and resourceful gentleman, Tom Perkins, has 'ventured past charted waters' to bring us a modern version of the old square-rigger, the DynaRig. He has done it in a big way with a real-life 'proof-of-concept' aboard his innovative and fabulous new 290' superyacht, Maltese Falcon.

My prior 'mast-aft ketch' had elicited notable resistance among members of the conservative sailing community, but I retain that discussion here on the website for those who can't grasp the newest concept of a free-standing, square-rigger. The DynaRig's application to a multihulled vessel is addressed under the new section, DynaRig MotorSailer (http://www.runningtideyachts.com/dynarig/). The selling this new design and rig should be quite a bit easier following the prototyping provided by Maltese Falcon.

[OldYachtie]

Gosh, you could haul it aft a bit, and add control sheets to the spars. Oh, wait a minute, then it would be a junk rig. Well, since we went that far, why not put unstayed masts in each hull, and have a bi-plane junk rig. That would have many advantages from an engineering and sailing point of view.;)

[yipster]

Brian, wrong thread but like to reply and share okay?
OldYachtie; sort of like team phillips or what i drew up below
with me wondering about aperant wind in lateral sails
i now see Tom Speer's study's on riggid twin wings, wow
http://www.tspeer.com/landyachts/twin/Concept.html
http://www.tspeer.com/landyachts/twin/yacht.jpg

[OldYachtie]

Re the last four thumbnails: Plus, you couldn't see it on radar, I bet. Looks just like a stealth plane or navy ship. Great for 21st century pirates, ar ar! Swash me buckles, matey!

[Guillermo]

Brian,
I really do like your new design of a motorsailer cat with the DynaRig, and find it appealing to cruising people (I don't know about big game fishers. Maybe those are another kind of guys). To my taste it's a much more 'sellable' concept than your previous aftmast one (this said without discredit of this one). I also like the Rim-Driven diesel-electric propulsion you suggest. A nice modern concept of a motorsailer. Congratulations. I wish you the best of lucks with this new project.
Cheers.

[brian eiland]

Does she sail....and beautifully

[yipster]

that’s sure looking good and no bad words from me on the airorig but I see more innovation in a folding aft bipod with its clean leading edge sail

a quik search learned solid wings deliver almost twice the effort with less drag vs soft sails that again perform better downwind

than a platonic fictional vision of a “beetle rig” came to my mind.
it wasn’t the booz and girlfrend dont wanna hear so pardon me telling / asking you sailing anargists again

when a ladybird wants to fly she opens her hard shelled wings and than from under there another pair of soft membrane wings.
made me somehow think of raising solid wing masts and fwd sails on a boat; time to see a shrink bout my boat syndrome?

confusing hypothetics and when thinking of the science I wonder if it isn’t better to exit to patching up my canvas, spring is here

ah well, i'll enter, said stranger things before i figger so here a spotted ladybird
http://www.nature-shetland.co.uk/naturelatest/pics05/ladybird.jpg

[Guillermo]

I've posted a new post at the New Propulsion Systems for Ships thread, which is also in relation with Brian's big game fishing catamaran concept:

http://boatdesign.net/forums/showpost.php?p=130326&postcount=285

Cheers.

[brian eiland]

Now that is rather innovative, and very interesting

[yipster]

as Brian sayd
i like that motorsailer and thanks for the link
think its even in relation with beetle above

[mydauphin]

Where can I get more info on this Kite powered motorsailor rig? thanks

[brian eiland]

Where can I get more info on this Kite powered motorsailor rig? thanks
Did you follow those links posted above, and did you visit the Skysail website??

I plan to draw up an adaptation of the SkySail rig to my 62-65 motorsailing catamaran real soon. And then a bit later include a tri-hull arrangement in that same size range, as contrasted to the Humphrey's 132 footer

[brian eiland]

I recently wrote with regards to an inquiry about a 40-ish version:

Unlike my 'single-masted ketch' design that I feel is not necessarily appropriate for a vessel of less than 45 feet, the DynaRig is appropriate for this smaller size vessel. In fact a ‘3-panel’ dynarig might be considered rather than the 4 panels of my new 63 foot DynaRig cat design, or the 5 panels of Falcon. However, I would still favor the 4 panel configuration, as it offers more variation in reef-able sail areas. And with my simplified sail furling mechanisms, it doesn’t add that much weight or complication to the overall rig.

Falcon’s dynarig was complicated by requiring the sails to be furled up inside the mast thru a hollow slot on one side;
1) the mast itself needed a slot in itself all the way down one side of the already weaker side of an elliptical cross-section. This necessitated an internal structure be built into the carbon mast section to reinforce it at the slot area

2) the furling mechanism then needed to be built inside the mast section, and a complicated track mechanism was required to guide the edges of the sails out onto the bridges to the yardarms & the yardarms themselves



I am proposing a much simpler furling and track mechanism for this modern square-rigger concept:
1) The mast will not have internal stowage of the sails, so no slot is required, nor internal support structure. It will be a simple elliptical section that will taper at either end to a smaller section at the top and a circular section at the bottom….not that much more complicated than an ordinary carbon mast for a sloop rigged vessel with a mainsail attached. It might also be a ‘sealed unit’ for ultimate flotation purposes.

2) Each rectangular sail will furl around a ‘wire’ (PBO, Kevlar, Spectra, carbon, etc) sewn across its mid-girth, and having eyes at both ends that clevis pin into ‘continuous line furling drums’ as you might find on ‘Code’ type reaching sails. The sails are constructed of low-tech, light-weight ordinary Dacron, and are of such relatively small dimensions that when furled around a very small diameter ‘wire’, they present a very small diameter package to the elements when ‘stowed away’. Each individual sail panel can be quickly and easily replaced, and inexpensively as well.

3) The furling drums are incorporated into the leading edges of the yardarms/bridges so as to present less windage, and they are’ stacked’ up vertically end to end in a line such that they ‘share’ bearings at either end. One small electric motor drives each panel for furling. For each panel of sail there are two (top & bottom) additional motors to unfurl the sail.

4) The yardarm ‘bridges’ can be shorter in length than Falcon’s with many inherent advantages including the more readily usable ‘forestay arrangement’ with or without a ‘code’ type reaching sail. Shorter lever arms requires less power to rotate the rig as a whole.

5) Three of the yardarms are of equal length thus less production cost…in fact probably these three would be only slightly more expensive than the elaborate furling/stowing booms now found on many ‘ordinary’, modern, short-handed sloop rigs.

6) The low-tech, Dacron sails of this rig should present some considerable savings over those modern sails for Bermudan rigs, and help offset the other initial extra cost of the Dynarig.

7) The sealed mast and yardarms could offer the flotation for the ultimate non-capsizing protection.

These proposed changes to the original Falcon’s interpretation of the DynaRig concept should result in a less expensive version, which is just as viable in sailing characteristics as the Maltese Falcon is proving to be.

[charmc]

II am proposing a much simpler furling and track mechanism for this modern square-rigger concept: ....

These proposed changes to the original Falcon’s interpretation of the DynaRig concept should result in a less expensive version, which is just as viable in sailing characteristics as the Maltese Falcon is proving to be.

Brian,

I wrote elsewhere that I like your concept for the smaller square rigger. Your ideas for simplifying the rigging make sense; I don't know if there will be any performance improvements; on the other hand, I can't see anything to detract from performance.

You're on the right track (sorry, couldn't help that), particularly since clients like Tom Perkins don't come around too often. :) You're working on innovative toys for the "average" wealthy guy. Hopefully, you'll sell a bunch.

[FAST FRED]

Each rectangular sail will furl around a ‘wire’ (PBO, Kevlar, Spectra, carbon, etc) sewn across its mid-girth, and having eyes at both ends that clevis pin into ‘continuous line furling drums’ as you might find on ‘Code’ type reaching sails.

Rope doesn't resist torque well , the sails might reef as poorly as the old setups with sewn in wire .

A simple solution (from the 1800's) is to use a chain under tension when rolling up.

The chain resists torque well with minimum tension , although sail attachment may need hand sewing.The chain sails can be bagged , SS wired cant.

FF

[brian eiland]

Rope doesn't resist torque well , the sails might reef as poorly as the old setups with sewn in wire .

A simple solution (from the 1800's) is to use a chain under tension when rolling up.

The chain resists torque well with minimum tension , although sail attachment may need hand sewing.The chain sails can be bagged , SS wired cant.

FF
I understand where you are coming from, but remember I am not asking these sails to 'reef' (partially furl). They are either fully deployed or fully rolled up. The relatively short lengths of these individual 'mid girth wires' is much shorter than std forestays. Some of the synthectic riggings are much better in torque than 'rope'.

[brian eiland]

I understand where you are coming from, but remember I am not asking these sails to 'reef' (partially furl). They are either fully deployed or fully rolled up. The relatively short lengths of these individual 'mid girth wires' is much shorter than std forestays. Some of the synthectic riggings are much better in torque than 'rope'.
Actually I'm coming back to the idea of just using 'solid rod' for these 'mid girth wires'....can be relatively small dia, so not that much more weight, handles the variation of load/no-load better than synthetics, and is cheaper and longer lasting than syns

[brian eiland]

I received a rather nice press release in an up-scale yachting publication just recently

Dyna Cat

[yipster]

compliments, thats a very very good article
did you see the rough ladybird pdf (http://www.boatdesign.net/forums/attachment.php?attachmentid=14475&d=1182962063) i made?
okay inspired but many paralel thoughts :cool:

[mydauphin]

Yipster, Great Ladybug PDF. Hope you build it one day. I like concept - I wonder how concept could be adapted to a large monohull ... How much sail is needed to move a 70 footer that weights 70,000 at 7-9 knots.

[yipster]

thanks mydauphin, ehr.. think others here can answer that question better and faster but did order marchaj's books.
forexample procyon has a strikable bipod. like making some schetches to see what aspects of concept to alter and have some L/B and deck dimensions.

[charmc]

Congratulations, Brian, that's a nice writeup. Hopefully good for business!

[charmc]

Beautiful design, Yipster. Hope you get the funds to build it!

[Guillermo]

I received a rather nice press release in an up-scale yachting publication just recently
Dyna Cat
Congs, Brian. As I told you, I like your DynaRig Cat concept. Good luck!

[SeaSpark]

In one of the Yachting World articles about Maltese Falcon was a detailed explanation by Gerard Dijkstra about why the Dynarig is not suited for a sloop configuration. As far as i can remember the main reason was the the inability to trim lateral sail balance.

[yipster]

eh, ah, that my ladybird can, reefing in stages tho
this beeing the intruded thread this idea got up why not a short animation
http://www.boatdesign.net/gallery/data/500/ps.gif

[Pericles]

SeaSpark,

Have searched Yachting World for article about Maltese Falcon, but cannot find it. Could you post more information please?

Pericles

[Pericles]

An interesting comparison between specially rigged proa and catamaran models.

http://www.youtube.com/watch?v=s-AzmNEj0EE

Pericles

[Landlubber]

Pericles,
try these mate, she is one hell of a yacht.
http://www.ybw.com/auto/newsdesk/20060513151951ywnews.html
http://www.yachtingworld.com/yw/supersail/falcon.html
http://www.ybw.com/yw/blog/20060908111845blog_david_glenn.html
http://www.yachtforums.com/forums/perini-navi-yacht/2487-perini-navi-maltese-falcon-sailing-yacht.html

[Pericles]

LandLubber,

She's a real beaut!:D

More years ago than I care to remember, I learned about a square rigged topsail gaffer schooner that used a pulley system to deploy the rectangular sail, outwards from the foremast, on rings sliding along the upper and lower spars. I've been thinking it was Joshua Slocum's design, but I can't be sure.

The sail could be set or reefed in seconds, like pulling curtains. With a bit of tweaking it would not be too difficult to emulate the Dyna Rig by laminating the spars from marine ply and epoxy, to create a 12 degree arc and then rigging the sails, top and bottom in sail tracks. A bit of muscle power on inhaul and outhaul sheets, passing down to the deck from the outer ends of all the spars and which are then cleated off, would position the rotating mast for upwind work. A car disc brake at the base of the mast would lock things quite securely. This square rig system is only suited for broad beam fast catamarans, as Brian Eiland has so effectively demonstrated, because although the mast rotates, it is still supported by very widely positioned stays.

OK, so there are a few more ropes, but we are sailors after all. It's what we do, haul 'em up, reef 'em in. :( :( :( Also, I must have a mainbrace to splice and a yard arm for hanging pirates.:P :P

Avast behind, me hearties!

Pericles

[Landlubber]

Pericles, no wonder women do not understand men, I would have been a pirate in another life, it really must have been a very adventurous time sailing around plundering wealth merchants. Today all we are allowed to do is go sailing still, but those times also will be limited if the dogooders have their ways, we would have to be licenced to go to sea, must have the manning, even if we want to sail solo or limited, have to wear hard hats, steel capped boots etc etc, "if it only saves one life"....oh please, let me go free.........

She is truely a woonderful little ship... great that someone would think outside the square, but put the money on the table too....that is the hard part.

[Pericles]

Become a private contractor and apply for Letters of Marque from Congress. :D

http://en.wikipedia.org/wiki/Letter_of_marque

Pericles

[SeaSpark]

Sorry Pericles, can't find the "Dynarig not for sloop" article either. There have been at least three multiple page articles about Maltese Falcon in Yachting World and have got only one at home. I'm pretty, sure it was in YW but i can be wrong, i read a lot of magazines and many of them featured MF the past Year.

I will try to find it.

[Tad]

http://www.hiswasymposium.com/symposium_papers.asp

Included is the best paper on the Dyna rig application, see 2004 papers.

JD explains that esthetics played a large part in rig geometry for Maltese Falcon. But in the context of an 87 meter vessel, certainly a single un-stayed mast version would not be sensible.

Tad

[yipster]

http://www.balancedrig.com/balancedrig_images/cruisingworld.jpg
found Tads good link and this balanced rig (http://www.balancedrig.com/) while thinking and searching
how a (up to 40% better sailing) aerorig may work in bi or A masts

[BigCat]

http://www.dunnanddunnrealtors.com/wingsail9.jpg

From http://www.dunnanddunnrealtors.com/Catamaran.html

[brian eiland]

http://www.hiswasymposium.com/symposium_papers.asp

Included is the best paper on the Dyna rig application, see 2004 papers.
Thanks Tad, I had missed seeing this paper...probably as I only had a cursory interest at that time

[brian eiland]

Just months after beginning the construction of a Sunreef 102 Double Decker, Poland's Sunreef Yachts has received an order for a 32m (106ft) multihull based on the exterior lines of the Sunreef 100.

The new Sunreef 106 Sailing is being built for a European client, and its modern interior is the result of close cooperation between the Sunreef in-house design team and the yacht's new owner.

''We've been receiving many inquiries for large custom yachts which is gratifying and supports our strategy to build these kind of boats," says Sunreef VP Nicolas Lapp. ''With our first two superyachts due to be launched in the coming years, we have now achieved our goal to be recognised as a builder of large custom yachts that only happen to be multihulls."

Headquartered in Gdansk, Poland, Sunreef Yachts specialises in luxury sailing catamarans and claims to be the first and only shipyard in the world to have under construction two multihulls over 30m (100ft). The company also builds monohulls and power catamarans, including the Sunreef 67 Power, which is due to be launched in April 2008.
(1 April 2008)

...I knew I needed some exposure in Europe, Brian

[brian eiland]

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

[schakel]

as Brian sayd
i like that motorsailer and thanks for the link
think its even in relation with beetle above

Ha, Fun to joke when it comes to littelary translated dutch translations but to get to your design;

Is that a skysail (a kite like the kite surfers?) kind of thing you were planning in your sketch. Great but the yacht is so heavy it benifits only a little when it comes to the uplift effect of a kite.

http://www.youtube.com/watch?v=FP0x7naNZ0A

[brian eiland]

Is that a skysail (a kite like the kite surfers?) kind of thing you were planning in your sketch. Great but the yacht is so heavy it benifits only a little when it comes to the uplift effect of a kite.
That sketch was just at the point of launching the kite, not for lifting.

....more here
New Age Trawler/Motorsailer; Kite assisted PowerYacht (http://www.boatdesign.net/forums/boat-design/new-age-trawler-motorsailer-kite-assisted-poweryacht-20319.html)

[dskira]

I recently wrote with regards to an inquiry about a 40-ish version:

Unlike my 'single-masted ketch' design that I feel is not necessarily appropriate for a vessel of less than 45 feet, the DynaRig is appropriate for this smaller size vessel. In fact a ‘3-panel’ dynarig might be considered rather than the 4 panels of my new 63 foot DynaRig cat design, or the 5 panels of Falcon. However, I would still favor the 4 panel configuration, as it offers more variation in reef-able sail areas. And with my simplified sail furling mechanisms, it doesn’t add that much weight or complication to the overall rig.

Falcon’s dynarig was complicated by requiring the sails to be furled up inside the mast thru a hollow slot on one side;
1) the mast itself needed a slot in itself all the way down one side of the already weaker side of an elliptical cross-section. This necessitated an internal structure be built into the carbon mast section to reinforce it at the slot area

2) the furling mechanism then needed to be built inside the mast section, and a complicated track mechanism was required to guide the edges of the sails out onto the bridges to the yardarms & the yardarms themselves



I am proposing a much simpler furling and track mechanism for this modern square-rigger concept:
1) The mast will not have internal stowage of the sails, so no slot is required, nor internal support structure. It will be a simple elliptical section that will taper at either end to a smaller section at the top and a circular section at the bottom….not that much more complicated than an ordinary carbon mast for a sloop rigged vessel with a mainsail attached. It might also be a ‘sealed unit’ for ultimate flotation purposes.

2) Each rectangular sail will furl around a ‘wire’ (PBO, Kevlar, Spectra, carbon, etc) sewn across its mid-girth, and having eyes at both ends that clevis pin into ‘continuous line furling drums’ as you might find on ‘Code’ type reaching sails. The sails are constructed of low-tech, light-weight ordinary Dacron, and are of such relatively small dimensions that when furled around a very small diameter ‘wire’, they present a very small diameter package to the elements when ‘stowed away’. Each individual sail panel can be quickly and easily replaced, and inexpensively as well.

3) The furling drums are incorporated into the leading edges of the yardarms/bridges so as to present less windage, and they are’ stacked’ up vertically end to end in a line such that they ‘share’ bearings at either end. One small electric motor drives each panel for furling. For each panel of sail there are two (top & bottom) additional motors to unfurl the sail.

4) The yardarm ‘bridges’ can be shorter in length than Falcon’s with many inherent advantages including the more readily usable ‘forestay arrangement’ with or without a ‘code’ type reaching sail. Shorter lever arms requires less power to rotate the rig as a whole.

5) Three of the yardarms are of equal length thus less production cost…in fact probably these three would be only slightly more expensive than the elaborate furling/stowing booms now found on many ‘ordinary’, modern, short-handed sloop rigs.

6) The low-tech, Dacron sails of this rig should present some considerable savings over those modern sails for Bermudan rigs, and help offset the other initial extra cost of the Dynarig.

7) The sealed mast and yardarms could offer the flotation for the ultimate non-capsizing protection.

These proposed changes to the original Falcon’s interpretation of the DynaRig concept should result in a less expensive version, which is just as viable in sailing characteristics as the Maltese Falcon is proving to be.


Did you do a cost estimate compere to a more classical rig?
Cost is often the difference between possible and impossible.
The MF was possible because a large amount on money was pouring in without restrain. It is not a viable model for any boat.
But if your simplified the rig to a cost at the same level as a, let say, a full batened classic multihull rig, why not? And they are not cheap.
Cheers
Daniel

[brian eiland]

Gosh, you could haul it aft a bit, and add control sheets to the spars. Oh, wait a minute, then it would be a junk rig. Well, since we went that far, why not put unstayed masts in each hull, and have a bi-plane junk rig. That would have many advantages from an engineering and sailing point of view.;)
That is what this fellow is proposing, a bi-plane version:
http://www.boatdesign.net/forums/sailboats/square-rig-variation-30031.html (http://www.boatdesign.net/forums/sailboats/square-rig-variation-30031.html)

[brian eiland]

Did you do a cost estimate compere to a more classical rig?
Cost is often the difference between possible and impossible.
The MF was possible because a large amount on money was pouring in without restrain. It is not a viable model for any boat.
But if your simplified the rig to a cost at the same level as a, let say, a full batened classic multihull rig, why not? And they are not cheap.
Cheers
Daniel
I did no cost comparison as I had no final alternative configuration yet. But this other subject thread (http://www.boatdesign.net/forums/sailboats/square-rig-variation-30031.html) has me thinking about a 'bare bones' version....buildable in back yard. Started writing and sketching a bit yesterday, but now headed to Florida to visit an old friend for a week. So probably won't finish that until I return.