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If you're worried about bureaucracy be warned about the dreaded Recreational Craft Directive (RCD). My understanding is that a boat being imported into the EU needs to comply with the RCD. But there...

I suppose a wing spar has to be torsionally stiff too, whereas an unstayed mast doesn't. Does this ply section have superior torsional resistance? I must say, it doesn't look like it.

John

FloMo, thanks for describing the sequence. The first boat I designed and built (a long, long time ago) used flat sheets with a vee cut out to produce shape. What I found was that the transition from...

IMO two things need considering - 1) stiffness, 2) failure.

Assuming the arch and the flat are restrained at their ends and assuming we're primarily concerned with stiffness (the point of...

Amazing!!

Is there enough ply left for butt blocks? How exactly do the pieces go together? I mean I can see where each part goes, but in what order do you connect them?

John

There was one for sale in the UK recently. Worth looking at the listing for the photos.

John

"When do you tell a potential (and lucrative) client to find someone else to design their impractical or ugly boat?" ..... Carl

Well like others have said, when the client doesn't pay enough. I...

A sit down facing forward nav station will certainly want a wider deckhouse, but is this the tail wagging the dog? Personally if I were going build an Englyn I would build the deckhouse as drawn....

I certainly vote for Englyn. But with aft galley. I wouldn't stick the feet of the berths under the galley and/or chart table unless I had too. By the time you've allowed for the height of the berth...

Bit of a drag having to take a tug with you every time you go sailing though.

JOhn

"I will stick with the 4-oar gigs here in Scilly"

?

Yes, and the closer you get the worse it looks.

John

Probably the last un-restored original Bristol Channel Pilot Cutter for sale on Ebay:
...

"Why not just cap the cost at $4,000 or some other figure and leave the rest open?"

It's a difficult rule to enforce. Suppose I "sell" you the solar cells for $200? (You can give them back later...

I'm still wondering about the efficiency of prop vs fin. Sure, props can be relatively inefficient if constrained to a small dia turning at high speed*. On the other hand, for how much of its stroke...

I like the video, but I'm afraid I've only got questions - no answers.

Isn't a prop just a set of rotating "fins"?

You point out the low efficiency of props, but what's the efficiency of the...

I'm going to stick my neck out here and say that if you're going to change the design why not just get a designer to design a new boat from scratch? It's probably the best investment you'll make in...

gondolier88, I think that's a different Redwing. Here's the Bembridge version.

John

I use Rhino every day, but I would have thought Carlson Designs Hull Designer would do the job quicker than learning to use unnecessarily sophisticated (and expensive) software.
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"Now I wish to perfect these offsets and draw the lines precisely."

As well as ending up with a slightly different shape (bear in mind that the software uses maths to generate very fair curves and...

I think it's an obscure mathematical term who's rough meaning is "the most accurate answer so far".

I suppose if the most appropriate WL is taken to be the LWL the angle of entry might be 20 degrees so the hull skin could be 1/cos20 = 1.06 times as big. Or say 6% to big from sta 0 to sta 1, 5% from...

That is an interesting point Nick. I suppose this difference would be greatest where the hull skin isn't parallel to the centreline or LWL of the boat - ie the bow and the stern. As this is a double...

"The second question relates to how one actually conducts the weight calculations (LCG) with regard to long items such as the hull planking and the keel."

I just click on the "Area Centroid" icon...

Given the choice I would prefer the matte finish for this magazine. In fact several years ago I emailed Watercraft Magazine suggesting they do this, and I guess they haven't because of the cost.
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"Your shoreward oar will need at least a foot of depth to pull in, so the few inches' difference in draft between vee and flat bottoms might be moot."

True. Glad I said "might" now.

"Do you think sprint performance, 100-200 metres, over a 4-5 knot springs ebbing tide would affect things? Remember its not V, its V and a keel sticking down, versus, that flat panel with a small...

Ed

As an aside I think it's worth pointing out that performance doesn't necessarily equate to speed in a rowing boat. A person can keep up a higher power output over a short time than they can a...

“Some men see things as they are and ask why. Others dream things that never were and ask why not.”

What's not to like? Count me in.

John

The NMM just sent an email detailing this database. Might be worth bookmarking if you have hundreds of magazines, you can use it as an index to find articles.
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"David Walkey was/is restoring the pilot cutter Kindly Light (1907 i think),and believe she was launched last year with some interior work still to complete."


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If you re-use it that stemhead fitting will probably need an interestingly shaped block of wood underneath it to fill the gap, although you mention letting it into the deck. Both solutions are a bit...

I think you have to set a standard now and stick to it. I'm not saying a high standard - far from it - just a standard that you feel comfortable with and stick to it. For example in my post above...

I've been "talking" to Rod by email about decks and thought I'd post some images I drew in CAD here in case anybody else is interested. The question is, can you use the same radius deckbeam...

"Strangely enough, the HB increase is remarkably similar to what I envisaged with the +1/8th on all dimensions."

I think HB does mention scaling up designs in his book. I'm sure he scaled up...

At 6' 2" I've never felt that lack of standing headroom was a serious disadvantage, and I lived on some of those boats - most of the time you sit or lie down. Perhaps I'm lazy, but why stand up when...

"Also involved in the pageant was Ed Burnett who designed the royal barge the Gloriana and helped to row it."

Will the plans be available for home builders?
...

"I am just saying if you refurbish the boat to a bit higher level of finish and appeal... when you decide to sell her, you may recoup more for your time and money."

Yes you might. My point was...

"Another point here is whether to actually build a "new boat" compared to just fixing up an old one. I'm interested in the project as shown in the links above where Tim Lackey actually built a...

A thoroughly seaworthy arrangement for such a small craft. I like it.

John

Very nice Rod.

Is that an inner forestay at the stem head? Does the jib have to tack round the outside of this?

John

Apologies Andrew. I didn't realise they were paintings...... :(

John

Well they don't really do much for me either, which is why I found it interesting. Who said - "Of all man's creations there is nothing more beautiful, I think, than a good-looking sailboat under...

Interesting that so far there's not one example of the generally accepted bastion of aesthetics - the painting.

John

At the risk of cluttering up a very good thread.........

At 6' 2" (1850mm) I think standing headroom is very over-rated in this size of boat (Gartside 116a and HB Englyn). Both have deckhouses...

"I don't suppose you would know if they are built on all bent frames ?"

Sorry, no idea.

John

"Destina looks much better to my eye"

Oh well.........that's why boats are so different I guess.

I like boats to be clean and uncluttered. For some reason I'm not keen on the rubbing strake on...

"John, here's another photo of a Yonne. I don't know the boat's name......"

Destina.

Yes the camber on Yonne does look greater. The closer we look the more individuality each seems to have. And...

"The drawings look good so I'm wondering if the appearance of the cabin isn't just an accident of photography ?"

I'm putting it down to less camber than the drawing. See the design catalogue, or...