were, unless I am much mistaken, Robert Clark's "Buttercup", which crossed the Atlantic, and Lord Riverdale's "Bluebird of Thorne", which circumnavigated.
I seem to recall that Chay Blyth originally set out on his quest for a wrong way around circumnavigation in a bilge keeler but had to turn back and "swapped" for a fin.
Am I right in thinking that bilge keelers seem to be a particularly British design approach to shoal draught?
I've been into Biscay in a Centaur, and my accountant went to the Azores in one, and they were quite unsophisticated. Something like Westerly Fulmar can cope with most weather conditions.
The reason people like them is for the drying out which I don't think they're that good at.
Of course there are plenty of shallow draft options that perform well offshore. Scheel and Winged come to mind or even a lifting option.
A friend who owns one distinguishes sharply, just as the late Lord Riverdale did, between a bilge keeler, that is to say a boat with a long centreline keel and bilge keels, and a twin keeler, that is to say a boat with no centreline keel but twin fins, with either a single centreline rudder or twin rudders.
I failed to make this distinction earlier - Buttercup was a twin keeler, as were Lord Riverdale's various Bluebirds, the last of which is a steel 50 footer. I remember him giving a lecture about her at the Little Ship Club in the 1970's. I think he really invented the type, his first Bluebird was built in 1922. He was not interested in grounding upright, save as a side effect; what he was after was better cruising performance.
Chay set out - without knowing how to sail - on the Sunday Times "Golden Globe" challenge to be the first person to circumnavigate solo in "Dytiscus III" a 30-foot bilge keeler, but retired near Cape Town. Later he chose Robert Clark to design a fin keeler for the East - West solo circumnavigation because Clark's designs - GM3 & Sir Thomas Lipton - had dominated the first three OSTARs (First - Second - First) which is a predominantly upwind race and virtually the only single handed race at the time.
Yes! I spent all last weekend under mine scrubbing away. She has a long keel, stem to stern of 3' 6" draught, with two bilge plates which means that once the sails are trimmed she will hold a course for hours. Also her 6.5 tonnes gives good stabilty with everthing up compared to lighter boats.
I saw a Moody 346 bilge keel for sale in Florida, it had been sailed over. They called it a twin keeler, and they are not to unknown on the US east coast but I never heard of a twin keeler on the west coast.
... the peculiar advantage that a bilge keel offers, of being shallow draft and able to dry out, is particularly suited to sailing conditions in the English Channel and southern North Sea. That is, large tidal ranges, shallow flat mud/sand seas, and many drying harbours.
Such conditions are found in few parts of the world and elsewhere bilge (twin) keels offer no advantage, while of course they have some well-known disadvantages. So there is little point in designing one for long-distance cruising.
Even if not designed for the purpose, nevertheless bilge keelers have made some pretty impressive voyages, and have demonstrated their capability.
Incidentally, Chay Blythe attempted to circumnavigate singlehanded in an early GRP bilge-keeler, a Kingfisher 30. Without proper self-steering, the yacht lacked the directional stability of a long-keeler and once in the big seas of the southern ocean off South Africa, proved unmanageable for single-handing. However in other respects its seaworthiness was not questioned.