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mightyhartley

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About mightyhartley

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    Tasmania
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    small multihull, cruising mostly

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  1. The alternative to the 'rig falls down' fuse is simply to have really low buoyancy amas- that way nothing actually breaks. And small proas at least can be righted fairly easily...
  2. Reply to old post I know... But don't Ian Farrier state his main reason for the wide-ish aft sections of his main hull, with lots of rocker aft (as opposed to a flat run like a surfboard), was so that at high speed the stern was sucked down- which was a way of keeping the bows up/avoiding nose diving. That was for the F27 at least...
  3. Yep, remember reading all through that link from way back then, thinking the same question. Recall there was some fairly vague reasoning about why he called it foiling- sort of equating it to the latest Vendee globe boats which had foils yet we're not completely fully foiling...
  4. Exactly, the evolution of ocean rowing boat design is fascinating full stop.. almost a spiral of auntie rowing this from it's early days to the modern proper boats! The first transatlantic crossing a century ago (mentioned here above) was basically a Dory, rowed by guys who worked the type fishing and knew what they were doing- toughed it out and made it downwind to England. Wasn't really tried again until the 1960s and 70s. Mostly those early boats were Dory-derived, but some of these crazies enlisted great designers - Uffa Fox and Colin Mudie - who added the obvious self-righting feat
  5. Sure, even the trades are not a constant thing, but these weather windows you speak of are not that particularly long in terms of rowboat crossing pace... Pacific Ocean rows have taken nearly a year (!) continent to continent, Atlantic varies from a couple of months to six... And if he fixed the route to what's mapped, then there is no shore hugging to minimise current effects. East to West on the large oceans looks doable in trade wind season, the bit below Australia is theoretically feasible as you can beat the W'ly system there- but he would be completely screwed when winds reversed a
  6. That is a great picture of assembling airship frames! A couple of interesting points relevant to a wooden boat thread: The Achilles heel of the wooden airships was the 1910's era glue used to hold them all together. It was a milk-derived product very susceptible to moisture degradation... which wasn't ideal for ships that were meant to be at home in the clouds. The airship division of German Navy, which spent most of it's time prowling the foggy North Sea, very soon sent all it's wooden craft over to the Army for inland operations because of this. Also, there was a long cat-wa
  7. This oft-repeated claim about the Spruce Goose is a very US world-view thing... The British airships R.31 (and sister R.32) of WW1 are the largest mobile wooden structures ever built- both were 615ft long, considerably bigger than the flying boat- check the scale of the people in the pic!. The airships frames were made from spruce plywood laminated into girder sections. Post war, they were bought by a timber dealer who broke them up to be sold for firewood ... but due to the fireproofing treatment they had received they would not burn!
  8. Yes, all the board sports which seem to see themselves as progressive have totally adopted the shunting way and look back on their roots as primitive and awkward for still using the traditional bow/stern model: snowboarding vs skiing; wakeboarding vs water skis; skateboard vs roller skates...
  9. It has always been interesting to me how there is so much 'traditional' confoundment at the idea of shunting in the sailing World, especially when it comes to mixing proas with 'proper' tacking/gybing boats. It is usually thought that confusion will abound and close quarter disasters inevitable... Funny thing is that this exact scenario has been occurring virtually all over the world for a couple of decades in the kitesurfing world. Apart from hard core wave riding areas where surfboards reign, most of the (non race scene specialist) kite world exists in mixed fleets pretty evenly divided be
  10. Maybe it "wants" to, but is it able to? I checked up in detail for this capability with my Torqueedo and the final answer was that the return circuits were very firmly locked off by the manufacturer (or seriously prevented within the fancy firmware rather than easily reversible by tinkering) as there would be all sorts of potential bad complications... Don't know if a more cheapo type trolling motor would have undergone the same levels of (over?) engineering as the Germans put into their motor, but the general logic was that it was more economical to stop charging than deal with battery/c
  11. Such musings on trying to cling to traditional state of the art in modern times puts me in mind of what happens when that sort of logic is taken to the nth degree: There was a guy who recently built a Reed raft in an attempt to show how Incas had reached Easter Island. During the early construction apparently the hemp rope order was late, so to keep workers from being idle they started the inner parts of the raft by lashing read bundles with synthetic rope sourced, ironically, from the local marine supply stores. Visible outsides were done up as per plans so modern stuff was all hidden.
  12. All this talk on here about hope that remaining competitors blow off the official finish- remember that RO has them over a $16,000 (ish?) barrel at this point as finishers get their entry fee back.
  13. Recall Don talking about thinner section in the video with his mate who bought the old mast...was extolling wisdom of that choice back then, but that may have been more about reduced length.
  14. Fishing boats had low freeboard because it is way, way, easier to handle gear (nets, lines, floats) over the side then if you don't have hydraulic winches to lift stuff... so it is productivity at work there. Headroom is really all about comfort, something not usually high on the priority list in many workboats even today... Volume for carrying stuff is related to displacement- underwater profile rather than freeboard above.
  15. Thanks for the correction trysail, was -and am -going from memory here... Point was he was always endeavouring to finish the circumnavigation, although first stop for re-masting obviously automatically disqualified him under original non-stop race rules. Due to various repair delays and season advancing he did not get home in 1968 season. In Southern Indian Ocean top sides were badly stove in after either collision with a whale or great white shark, hence amazing at sea repairs and stop in Aus. His boat was lightweight cold molded fin Keeler (so obviously totally unsuitable..!). RKJ
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