Ben G

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About Ben G

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    Brisbane
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    12' skiffs

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  1. Maybe to clarify - the intention is the gaff on the lateen sail would hang under the tripod (in black) somehow. There isn't a forestay - all lines in black would be a tube. Looking at the seat position in the photo agian, I'd move the 'A' frame forward to sit just behind the front bulkhead. But it's just an idea.. that you could experiment with, without drilling or cutting holes in the boat, and without load from rigging cables
  2. I think a lateen sail could be set up well, from a light tripod which clamps to the gunwhales and the stem fitting. The sail could be rolled around the gaff spar when not needed. The tripod base (thwart) can be forward of the sitting position. The tripod can lean fore / aft to balance the 'helm' as needed. a small line for T sheet would head to the floor, aft of the seat (maybe tie off on a footrest?). The tripod could be made of very light composite tube, 20 or 25mm round carbon tubes for example, laminated together at the corners, and to padded shoes that sit on the gunwhale. It would be very light and put very little load on the boat. For the same sail area, it would be lighter, more efficient, and less loaded than an opti rig (which, imo, is a heavy and clunky solution for this). The sail would be very simple to cut yourself as well. It would be slower on a square run, but who sails square these days anyway... And if you don't like it, you can remove it without having ruined a nice boat. MS paint image attached... I am not good at paint. Tripod in black, Lateen sail outline in blue (sort of)
  3. Ben G

    Asym Sheet Length Question

    I've been told to cut it a foot shorter each race until its too short, then buy a new one 1' foot longer
  4. Ben G

    boy is this girl in for a surprise..

    So... the naysayers would turn down a ride on IMOCA 60 to instead get on an aeroplane? Go and log yourselves out now!! And, fwiw, building an IMOCA probably doesn't use a great proportion more carbon fibre and highly energy intensive materials than an airliner per person. Definitely not burning fuel and, as it's built from Carbon fibre will be extremely durable (significantly longer lifetime than fibreglass imo) .. "Each 787 contains approximately 77,000 pounds (35 metric tons) of carbon fiber reinforced polymer (CFRP), made with 51,000 lb (23 t) of carbon fiber." https://en.wikipedia.org/wiki/Boeing_787_Dreamliner "A jumbo jet (Boeing 747-400) flying from London to New York burns approximately 70,000 kilograms of fuel. Jet fuel has an approximate specific gravity of 0.85, which therefore equates to 82,353 litres. https://www.flightdeckfriend.com/ask-a-captain/how-much-fuel-does-a-jumbo-jet-burn/ " Looking at the likely number of passengers, the range and the fuel capacity, the fuel consumption figures for the A380, Boeing 787, 777, and 747 very comparable. " http://www.airportwatch.org.uk/2012/05/dreamliner/
  5. Ben G

    is it me or is it you?

    Agree, trying to understand how AS might be able to benefit a 'non-pathway' class, despite some brief engagement was somewhat difficult to follow.
  6. Ben G

    Commercial Sail

    I hope they get something started. It would also be interesting to know if a small cargo yacht could displace short-haul air cargo. There are a lot of heavy things that don't require air freighting, but are air freighted to avoid slow port logistics and customs
  7. Ben G

    When do you just fucking Give Up ?

    Properly made carbon spars bend a lot, before they break! Slo-mo Video below, the mast is ~50mm ID 1.6mm Wall, High modulus uni's F/R, plastic track. The mast step failed and the spreader geometry too close to the edge, causing the mast to invert. I'm guessing your mast failed where a laminate finished abruptly causing a stress raiser and possibly wrinkled fibres in the layup..
  8. I once had a laser, and the deck fell off. Get one with a deck
  9. Ben G

    prism

    Pity it doesn't have a timer like the tacktick, which is very helpful on crewed dinghys as everyone knows the time to start. Can you comment on the resolution and directional damping compared to the tacktick? I find the tacktick heading hard to rely on for changes below about 10 degrees. I generally dismiss heading changes five degrees or less as noise. In fact because of this uncertainty I still rely mostly on intuition regarding wind changes. Whether because of heel, boat bouncing around, or other small oscillations I wouldn't know. Tacktick is still handy to pick up new changes at the beginning of a beat or gybe.
  10. Ben G

    2017 Rules Rule 69

    Thanks for the replies - For context it was during some sprint race and start training, iirc no points no RC, definitely no PC. From start to windward mark only a few hundred metres. I don't think either boat would risk the scenario in a major race. And yes the purple chute went up far too fast! Feel it was definitely different to case 73, so I'd agree W DSQ and L DNE, just all round bad behaviour! Is there an established method of what defines 'keeping clear? It actually takes a fair bit of skill to steer accurately enough at those quarters. Don't want to slowly squish my crew.. I suppose the right thing to do is to bear off (ie sail parallel with them), and raise a flag so they can practice their turns
  11. Ben G

    2017 Rules Rule 69

    Good point, but there are differences to some important points that I would make: 1/ boats weren't sailing parallel (until in close proximity), the windward boat was footing to the mark. 2/ there were prior calls for room earlier and the boats were very close for the wind and sea conditions (witness capsized boat earlier in footage as an indication of relative difficulty). (How close is too close? Leeward boat need only slip on the tiller one inch and it would cause a damaging collision, as boatspeed would be ~10 knots and they turn very fast) 3/ If boats weren't sailing parallel in the video, they may have crashed: ie the video can never show intent. It would be nearly impossible to determine who changed course, as 12's change course constantly. 4/ Does it actually breach rule 2 fair sailing? Uncleating the jib seems a fair punishment for someone coming down on you... they know whats up as do we.. don't need to wait for crew to be injured. Am interested in some feedback
  12. Ben G

    Seascape D2 aka 14

    The small volume in the aft quarters (where seat is removed) makes it seem prone to the stern sinking in a bad tack - adding a transom may help? Otherwise I like the concept of removing the 'seat' adjacent to the tiller. Yes.. I have indeed done a stern first capsize, on the start line in strong wind.
  13. Ben G

    2017 Rules Rule 69

    This is one way. Know how your boat works, and your mates' boats. Pity the only audio is the ratchet block! skip to 20 secs, for the impatient.
  14. Ben G

    I14 Capsize Compilation

    Could this be the, ah, target manoeuvre?
  15. Ben G

    AC36 Protocol - Ask Dalts

    Why 75 ft? at least, 72ft is the size of another maxi class.