Ben G

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About Ben G

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  • Location
    Brisbane
  • Interests
    12' skiffs

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  1. 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/
  2. 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.
  3. 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
  4. 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..
  5. I once had a laser, and the deck fell off. Get one with a deck
  6. Ben G

    everybody doin' it?

    With a narrow fin keel, getting enough lift can be done with extra leeway, without the penalty of carrying extra skin friction around the whole course. so designing a boat that can powered up by sailing with extra leeway may be the fastest way around the track
  7. Ben G

    what is it?

    Thats not a mast
  8. Ben G

    Aerodynamics of sail platform on boom

    You can see in this image, there is little cross flow under the leading edge of the boom, while it is much more significant near the clew. The trailing edge of the jib ensures the flow is primarily fore-aft near the mast. I'd stop the solid tray just before it hits the sidestays, as forward of this would be aerodynamically un-necessary and would also obstruct the workspace around the mast
  9. Ben G

    beware

    what's a hard launcher?
  10. 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.
  11. 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
  12. 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
  13. 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.
  14. Ben G

    complicated game

    I heard a good spot to measure direction, that's relatively un influenced by sail flow is off the tip of the windward spreader. Sounds convenient?
  15. 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.