More about Whimbrel

 I've been working steadily on the building plans for 'Whimbrel' with most of my time going into the construction details. Concentration leads to being '...in the zone...' and some insights pop up. 

One such insight has resulted in me abandoning the idea of a free-standing mainmast for 'Whimbrel' - at least for a stock plan - and the associated slot in the foredeck, large centreboard-case-like mast box, and the balance lug mainsail. 

The Primary reasons for this decision are the weight and somewhat complex construction of the mast box, and the difficulty in carrying out maintenance inside the box long-term.  

The plans will now show a Yawl rig with a small jib, a gaff-headed mainsail, and a Leg-o'-Mutton mizzen as before. The mainmast will be deck-stepped in a tabernacle, and will be supported by masthead shrouds and forestay, because a Balance Lug does not marry well with shrouds and stays.

This rig has particularly good reefing qualities, including dropping the main completely in a hard chance, and proceeding under jib and mizzen with reasonably good hull balance.

More up-dates to follow at a modest pace......

Update to the First Mate article link

 Thanks to Janko and Anon, the link to the archived First Mate article has been updated.

https://web.archive.org/web/20210306012157/https://smallboatsmonthly.com/article/first-mate/

A Favourite Design - First Mate

Many times I've been asked which of my designs is my favourite. Well, that is difficult to answer because all boats are the result of compromises due to the combination of uses, weather, loads and local conditions - not to mention the differences in taste and attitude on the part of we humans... So the question should be, "What is your favourite design for ............. conditions?"

What I can say is that 'First Mate' pleases me every time I think of her. She is easy and quick to build, is light, fast and handles a head sea well. On top of that, she rows better than I could ever hope, considering that oars are primarily for use as auxiliary power.

Here is a link to a nice article written by my good friend Ian Hamilton, for whom 'First Mate' was originally designed.

https://web.archive.org/web/20210306012157/https://smallboatsmonthly.com/article/first-mate/

Removable Side Seating and Bunk Flat

 Side seating is a subject which comes up frequently in the emails I receive. Previously I have made comments about a simple arrangement which suits Phoenix III, Phoenix 15, First Mate and Flint very well, and is simple to fabricate. However, I have not included construction details in any of my plans, so I'm going to give some information about the system which I prefer.

This photo shows removable side seats in the Phoenix III built by Paul Hernes, the fellow for whom the boat was designed in the first place. Paul made deluxe versions as you can see!

The seats are a loose fit and rest on wooden cleats glued and screwed to the face of the stern sheets  and the aft edge of the main thwart. For my own use I would probably use 19mm x 19mm (3/4" x 3/4") for the cleats but the size is not critical.

This was Paul's approach based on the idea I had given him. At this stage he had short support cleats under the fore and aft ends of the seats, but I'll discuss other options later.

Here you can see the magic of the arrangement. By bringing the the two seats into contact along the centreline of the boat at the same level as the main thwart and the stern sheets, there is a bunk flat high above any bilge water, with plenty of storage space underneath. 

I don't remember how wide Paul made his seats, but for my own use I think I'd go for 305mm (1') wide, giving a bunk flat 610mm (2') wide. 559mm (22 inches) is considered a standard minimum in boat design, so here you get two extra inches of luxury! In the case of Phoenix III, Phoenix 15, First Mate, and Flint, the sleeping lengths are 1861mm (6' 1-1/4"), 1910mm (6' 3-1/8"), 1766mm (5' 9-1/2") and 2132mm (7') respectively.

Another approach is to use plywood seats with (say) 42mm x 19mm (1-7/8" x 3/4") framing.

19mm x 19mm (3/4' x 3/4') cleat against stern sheets bulkhead of Phoenix 15

...and against the aft face of the midships thwart

Plywood side seats with timber framing...

...slid together to make a full-length bunk flat

So as you can see, the provision of side seating and an effective bunk flat is a simple and light-weight proposition. Having said all of this, I still prefer to sit down in the turn of the bilge when sail, where one's weight is more effective as ballast than anywhere else other than hiking out beyond the weather rail. People find this hard to believe, but it can be easily demonstrated on paper.

David Lillistone comfortably seated in First Mate (on the bottom) towards the end of a long sail