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Swift Solo

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    Posted: 11 Jan 06 at 4:09am

 

Jim C said

“And a wider deck beam boat will always be faster than a narrower boat until it gets way into major control problems”……

 

Actually a wider deck beam will always be slower and harder to manage until the wind velocity / sail area exceeds the available righting moment.  The real problem with wide beams in single handers occurs in light to medium gusty winds.  Once you are overpowered, you can stay out on the wire without moving in the lulls by simply de-powering the rig and playing the sails.  This is especially true with the Swift because the sheeting system and the on-the-water adjustability. Eight inches of sheet play will neutralize nearly any gust.

 

“So there's some evidence to suggest that "too wide t handle" is not really kicking in at Musto Skiff/RS700 beam…...”

 

 Again, too wide to handle occurs at the full out traping threshold—around 10 knots of breeze in many single handed trap skiffs

“But I'll bet its possible to go faster than any of them. I also am beginning to have my doubts about very big sails: I have an idea that dinghies are starting to approach the sort of performance area where efficiency is becoming more important than brute power. After all how much rag is that AC carrying uphill?”

 

No doubt that you can build a single handed trap boat that will go faster than the Swift.  The real question is—will it go faster and remain tactical or will it simply be another “bang the corners---one trick pony” that tacks and gybes like a cat?  The picture is of Charlie McKee in USA 001 (the prototype—still had cut down 49er mast and sails).  After just 45 minutes in the Swift Charlie could gybe from wire to wire faster than any boat / sailor I’ve ever watched.  The closed wing / high boom /  and run through deck contribute to making the Swift a boat that is so tactical that you need to play even the small shifts if you expect to win.

 

I suspect that the AC would be faster in 8 knots of breeze if it had more sail area?  Remember, the vast majority of major regattas worldwide are held in winds that average between 5 and 15 knots.

 

Dennis said

“didn't mean the 9er resemblance to be a bad thing, on the contrary I believe it to be good................. the stuff about beating 14s and 49ers was said jestfully and I hope the boat is successful in meeting its aims”.

 

Dennis, I didn’t read your post as a negative thing.  Your observation is correct since the boat looks a bit Bethwaite for the reasons stated.  We need to get you out in a Swift.  49er sailors can step into the Swift and make it look really easy quickly.  You’d find it far easier to bear away and gybe in a blow (I suspect that has more to do with the fact that the entire crews mind is directly connected to the tiller than the boat itself --dancing alone is easier).    

 

Rupert said

“As a wooden boat sailor who is too cowardly to sail any of these boats (I have my hands full with a 1960's sliding seat ToY) I have to say the Swift Solo in those on the stands pics just looks amazing. Whether she is faster, or otherwise, who cares, just to be sailing a boat that looks that pretty and yet still is up there with the fastest bits of gel coat around must be a great feeling.”

 

 

Thanks Rupert—it has been more fun than should be legal.  Be careful though, to call the Swift a “wooden boat” is to call the Musto and the Voodoo “foam boats” (you’ll likely get flamed).  The Swift does have a wood core but with s-glass on the outside and carbon / Kevlar on the inside of the composite sandwich.  Most other skiffs are e-glass skins over a foam core.

 

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Post Options Post Options   Quote 49erGBR735HSC Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jan 06 at 9:51pm
I didn't mean the 9er resemblance to be a bad thing, on the contrary I believe it to be good................. the stuff about beating 14s and 49ers was said jestfully and I hope the boat is successful in meeting its aims. Can't wait for the results of the skiff-shoot out, should be very interesting because the boats which will be competing are all great.
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Post Options Post Options   Quote Bram Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jan 06 at 5:34am
Originally posted by 49erGBR735HSC

Is it just me or does the swift-solo look like a widened 29er with a bit more sail area..............?

(29erXX may prove a bit of a challenge, before you consider UK 14s and 49ers )

Actually Dennis,

It's a bit more like the 49er in terms of underwater surfaces (much less rocker--proportionally more beam and a bit more concave chine line forward).  The Swift was originally designed as a single handed trainer for 49er sailing.  The height of the deck step and pitch of the wings are similar to the 49er as well (not rounded for hiking like the 29er).  As pointed out earlier, above the chine/waterline, it gains volumn much faster than either the 49er or 29er.  I did this to minimize bow diving because of the large masthead kite.  It's hard to see in the photo but the chine is a bit concave from the bow to station 6 (just forward of the DB)

To be sure, I owe both of the Bethwaites for much of the design and for many of the rigging ideas.  Frank's High Performance Sailing is a brilliant piece of work when you combine it with more recent design development.  Julian has been a big help to me as well and I believe that he and Paul Beiker are the brightest of the current skiff designers by a significant amount.

An observation and prediction:  future gains in skiff design will come from integration of systems not simplification.  Much more sophisticated systems will be developed that will make rig control simplier to acheive.  A single string adjustment that will accurately and proportionally tighten, primaries, loosen lowers and caps, loosen the jib leech while tightening the jib luff right up the wind range is just around the corner.  The Swift has a sail plan and rig that allows trapping in 5 knots while maintaining control in 25 knots with a single suit of sails.  Because Swift rig control is not "One Design", we are working hard to simplify and integrate rig control adjustments (it's hard to adjust turnbuckles in the middle of a race when the wind velocity changes radically--especially single handed.  It's even harder to pull out the boat bender in the middle of a race)  

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Post Options Post Options   Quote swiftsolo.org Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jan 06 at 3:53am

Dennis,

As I'm sure Bram would confirm he used Bethwaite hull design as inspiration when designing the Swift Solo. He is an ex 49er sailor himself, I think he may have been president of NA class association.

His design is different to a Bethwaite hull in a number of ways, the chines curve inward a little at the transom which allows the gunwale to be angled as well so that you have a better trap position at the rear of the boat. (Bethwaites always keep the chines dead straight) There is also a little more fullness in the bow to prevent pitchpole issues.   

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Post Options Post Options   Quote 49erGBR735HSC Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jan 06 at 2:01am

Is it just me or does the swift-solo look like a widened 29er with a bit more sail area..............?

(29erXX may prove a bit of a challenge, before you consider UK 14s and 49ers )



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Post Options Post Options   Quote Sandy Hook Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jan 06 at 1:26am

Originally posted by Rupert

As a wooden boat sailor who is too cowardly to sail any of these boats (I have my hands full with a 1960's sliding seat ToY) I have to say the Swift Solo in those on the stands pics just looks amazing. Whether she is faster, or otherwise, who cares, just to be sailing a boat that looks that pretty and yet still is up there with the fastest bits of gel coat around must be a great feeling.

But not only that, today linear polyurethane is harder to scratch and its shine is longer lasting than gelcoat as a top covering.  The Swift will not get soft wing roots or heel dents in the deck and wings or lose its shroud tension after a day out as it gets a few years old. I think my swift will last me a lot longer than my 49er did and look a lot better at the same age. Ive managed to take a pound or more out of the rig, I've had a lot of fun working out how to do that. I think I might be able to get more out of the rig and sails later. The blades are unbelievably light. All Ive got to do now is shed a few of my own pounds. But thats what skiff sailings for Eh!

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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jan 06 at 9:51pm
As a wooden boat sailor who is too cowardly to sail any of these boats (I have my hands full with a 1960's sliding seat ToY) I have to say the Swift Solo in those on the stands pics just looks amazing. Whether she is faster, or otherwise, who cares, just to be sailing a boat that looks that pretty and yet still is up there with the fastest bits of gel coat around must be a great feeling.
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Post Options Post Options   Quote Bram Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jan 06 at 9:43pm

 

Just to refresh your memory!!

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Post Options Post Options   Quote Jack Sparrow Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jan 06 at 8:59pm
yes it has.... it's got lots of them... look >>
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Post Options Post Options   Quote olly_love Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jan 06 at 2:20pm
i was refering ot the voodoo sorry. the swift looks good as well but just hasent got the lines of the voodoo
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