How did the old timers design hulls

Who killed the classic yacht

Well, perhaps James Jesus Angleton along with, oh no, that's another topic, the classic yacht was killed by a conspiracy formed firstly by the agility in tacking, secondly the appearance of narrow ports where yachts could park (yachts in the past used to sleep with buoys) and thirdly the obsession with reducing the wet surface

Why don't you try to show some evidence for these utterly untrue claims?

There was no significant "appearance of narrow ports" as distinct from mooring buoys when yacht design changed from the "classic" long keelers. Boats had always been getting into small harbours and needing the manoeuvrability to do so.

Anyone who knows their boat design history knows that the light displacement fin keelers, came in during the 1890s, well before marinas existed. It is therefore utterly wrong to claim that classic yachts were "killed" by "narrow ports". Cowes, for example, is a "narrow port" and it was used by both "classic yachts" and light displacement fin keelers. Classic boats were not "killed" by anything - they are still alive today.

If one defines a "classic yacht" as a medium long keeler with attached rudder, then it is untrue to claim that they were killed by a "conspiracy" formed by agility in tacking. It's just not true. The early designs with fin keels and separated rudder came about largely as a result of the desire to reduce wetted surface. I challenge you to show actual evidence to prove your claim.

The "classic yacht" with long keel and attached rudder was eclipsed in racing by the rise of lightweight fin keelers after the length x sail area rules were created. It then returned to racing with the International (Metre) and Universal Rules that penalised light displacement in the pre WW1 era. The longer keel and attached rudder then dominated until the 1950s and 1960s.

There was no change to "narrow harbours" in the period when the fin keelers were penalised before WW1. Your claim is simply untrue.

The earliest influential cruiser/offshore racer types to move away from the "classic yacht" style were boats like Zeevalk, Hoot Mon, Nocturne, Miranda, and perhaps the 410, 210, 11o and Flying 15. Nothing indicates that their appearance had a single thing to do with "narrow harbours". For example Uffa wrote at length about the Flying 15 design and he did NOT mention "narrow harbours" or fast tacking. The port facilities in Sydney did not change to "narrow harbours" before Payne designed Nocturne. No mention of the inspiration behind Zeevalk, Hoot Mon or Miranda mentions "narrow harbours" or short tacking.

Where is the evidence for your claim?

There is plenty of actual real information about why fin keels took over. No one who was writing about their arrival in English mentioned "narrow harbours", and fast tacking wasn't really a major issue.
 
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at times keel length was taxed in france and beam and flare were taxed in england
 
By the 1880s, the top designers were normally designing by using plans rather than models.
Herreshoff designed hulls by carving a half model into the 2oth century. Offsets were taken using a high accuracy machine.
 
In fact even earlier there was a flurry of interest in singlehanded cruisers in both the UK and USA. One of these was Wulfruna, 18ft LOA. It's utterly incorrect to say that a singlehander takes eight crew.

Hi,

If user @CT249 is still with us, can you let me know where the picture and article about the Wulfruna are from? Curious to read more of what is written there. If this user is no longer with us, does someone else know the source material?

Thanks in advance!
 
If user @CT249 is still with us, can you let me know where the picture and article about the Wulfruna are from? Curious to read more of what is written there. If this user is no longer with us, does someone else know the source material?

Welcome to the forums.

Since the surrounding text mentions VANDUARA as "this seasons production" (she was built in 1880) and MISCHIEF "built last year" (i.e. 1879) and the America's Cup "next year"; I'd look toward an american yachting magazine starting in mid 1880 to just before 1881 America's Cup.
 
Welcome to the forums.

Since the surrounding text mentions VANDUARA as "this seasons production" (she was built in 1880) and MISCHIEF "built last year" (i.e. 1879) and the America's Cup "next year"; I'd look toward an american yachting magazine starting in mid 1880 to just before 1881 America's Cup.
Thanks!
 
Welcome to the forums.

Since the surrounding text mentions VANDUARA as "this seasons production" (she was built in 1880) and MISCHIEF "built last year" (i.e. 1879) and the America's Cup "next year"; I'd look toward an american yachting magazine starting in mid 1880 to just before 1881 America's Cup.
I found a mention in Forrest and stream, from November 1880, It gives a lot of dimensions, and specs. Unfortunately but not the article picture here. Hathi-trust has this available online. The field (from London) has mention of this boat a few months earlier, but I don’t have access to those archives, unfortunately.

If anyone has recommendations for other American publications I might search, I’d appreciate it!
 
One of the boatdesigns members Eric W. Sponberg Naval Architect (retired) wrote:
THE DESIGN RATIOS A Naval Architect’s Dozen (or thereabouts) A primer on some basic principles of naval architecture for small craft. As first published on BoatDesign.net, January – March, 2010. By Eric W. Sponberg Naval Architect BSE, PE (CT) CEng (UK)
I think one of the best place to start working on it is the design ratios if you have basic understand already.
Home https://www.ericwsponberg.com/
https://ericwsponberg.com/wp-content/uploads/so-you-want-to-be-a-boat-designer.pdf
https://www.ericwsponberg.com/wp-content/uploads/2021/09/THE-DESIGN-RATIOS.pdf
Naval Architect is not for the faint of heart.
 
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