Here’s one for the Techies.
Going to wind ward, a balanced lug isn’t going to point quite as high as the BayRaiders can so I’m used to playing “tail-end Charlie” in such company. (My lugger points higher if I fly the jib in addition to the lug sail, but if tacked to the stem, without a bowsprit, it catches on the yard when tacking so I don’t often bother with it.)
How is it then, that in light airs my 5.8m CBL “Four Sisters” is faster downwind than an epoxy ply BR 20 (Morbihan) and faster on a broad reach than a BR17? (Lake Bala)
In the Morbihan she was carrying a 25kg Yamaha 4hp + 12l fuel as well as full cruising gear, 90kg of church roof as ballast, and an 80kg skipper (Oh! all right ....85kg)
In ghosting conditions – not enough wind to fill a spi - she went past BayRaiders, Skellig IIs, various Vivier designs (Not “Pen Hir”, obviously!) and practically everything around her own size (....and I have the photos to prove it) this with the tiller locked while her skipper rolled cigarettes, brewed a coffee and hunted for a missing bag of nuts. Unfortunately the effect is only temporary as with a decent wind “Four Sisters” rapidly hits hull speed of about 5 knots and has to watch while everything else goes past her. Even with the 4 hp going flat out you can’t push this hull any faster than 6 knots - getting up on the plane is not an option!
On Lake Bala this year, going to windward in an F3/4 (reefed), she was doing 4 knots (Av) and 5 knots in the gusts and , of course, the BRs went faster and pointed higher. Running and broad reaching back in the afternoon with the wind dropping (still reefed – just too lazy to shake it out) I was still recording her hull speed at times but even when the lake was glassy smooth with just light zephyrs she still kept enough speed on to make rowing unnecessary. (Apart from a short stretch in the dead zone in the middle of the pond.)
Is this down to hull shape? (no transom to drag) or the efficiency of yer bog standard balanced lug sail in putting up a lot of sail in the winds way.....known to science as the Barn Door Effect?
Can’t believe that a BayRaider hull is less slippery than CBL so I imagine it must be the sail.
This being so, I wonder if anyone has thought of putting a big lugsail on a BR? A balanced lug is very user-friendly for single handed cruising sailors, hoists without stress, drops in an instant, easy to reef, is brilliant reaching and fast down wind. With good luff tension, a bit more string to adjust boom and yard positions, even its pointing ability, the Burmudian be-all and end-all, can be much improved. Any doubts about that? Have a look at the Goat Island Skiff.
http://www.youtube.com/watch?v=HN8ONtO9-90 (Is that the guy from ZZTop?)
http://www.youtube.com/watch?feature=player_embedded&v=B2BHZKH6r4o (This is the Yawl version of the GIS. Boats are handier with a mizzen, I think.)
Of course, for the ultimate in control, a fully battened lug sail is the answer.
Step forward “Cavatina”!