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ScottiE

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Posts posted by ScottiE

    Private Skipper fined after accident

    in MarineTalk

    Posted

    passengers in a car may not be aware of the risk - children for example. So I think the analogy to a recreational skipper is fair (air craft pilots are a different matter).

     

    For accurate comparison - his fine was $6750, His reparation payments to the passengers who were hurt totalled ~128k.

    More wind damage

    in MarineTalk

    Posted

    I was amazed at the carnage on the river when we were on it this weekend. A good number of sunken vessels (don’t short cut the northern end of the bucks moorings btw! ), drifters - there’s still one on the putty just a few 100m from me at Farm Cove. And I’m sure U-Neek is closer to the starboard channel marker - though John B reckons she’s longer than the previous boat on that mooring.

    "New" Marine Pest in Fiordland

    in MarineTalk

    Posted

    I always thought it would be easy to install a concrete wash bay with piles.  Once you've blasted down your boat just wash the stuff into a pit and shovel it into garbage bags for disposal.  Not really different to what's done on the quick haul at Panmure.  Bund only needs to be 100mm high.

     

    Mind you, you would still need a few bays - running 24/7 - 1 bay only equals 700 vessels a year!

    Power and a bottle of wine

    in MarineTalk

    Posted

    q(J) = m x C x dT where q = energy in Joules, m mass of stuff being "heated" in grams, C = specific heat of stuff (j/g/deg.C) and dT = change in temperature.

    assume 750ml wine = 825g (sg ~1.1); glass bottle = 400g; C = 2.3 - 2.7 J/g/deg.C wine; = 0.5 - 0.9 J/g/deg. C glass

     

    therefore  you need [825 x (2.3 : 2.7) x 13] + [400 x (0.5 : 0.9) x 13 = 27.3 - 33.6 kJ of energy plus losses (depends on your cooling method)

     

    someone else can finish this - got a meeting to get to

    Here is the boat for the 2021 Cup . .

    in RaceTalk

    Posted

    Um how many canting keels have fallen off - lots

    So what - that's irrelevent for a day racer that is thoroughly inspected at the end of every day on a budget with a few extra zeros tagged on to the end

    also canting keels don't cant 200 odd degrees 

    not relavent - but actually neither do these - I'd say these boards cant through no more than about 90deg.

    and there are two of these flappy things

    again not relevant from either an engineering or naval architecture pov

    heavy things don't fly, they sink!

    I reckon there will be no ballast other than what they write as a min. into the rules.  Remember the rumour that TNZ had the heaviest boards due to their construction but paid they off against foil plan form

    THINK about the loads on everything!! - I mean cats load up heaps and we're not trying to lug around tons of ballast

    I have - even drawn a few free-body diagrams - don't see any issues.  Infact the single hull makes it feasible to carry the mainsheet loads if they go to a membrane main.  Stil reckon they'll want wings though - they'll foil much sooner

    how do you power the cant movement of the flappy things - engine, fuel, batteries?

    I thought I answered that in my first post

     

    Look hats off to them if it works. I just can't see it !!

    Wanna put a wager on it?

     

    and it is against every reason for dumping the ac50's 

    All except one.  They signed an agreement with the CoR to go back to a mono.  In return they got all of Prada's IP on the multi (which I understand was right up there) plus a whole heap of coin to survive , just , just long enough to get across the last finish line.  If that hadn't happenned, TNZ would have actually struggled to get to Bermuda and this conversation would not be taking place.

     

    I reckon they've had to go to 75ft to make this concept work, any shorter and it would struggle - any longer and the budget would have been inter-galactic beams rather than just moon beams!

    Here is the boat for the 2021 Cup . .

    in RaceTalk

    Posted

    How the F$%k are they gonna get those things to wave around as per the video.

     

    The same way they wave canting keels on 120ft ocean going race boats around.  The forces required are no different - just located differently 

     

    I don't see this concept is particularly innovative at all if you think through it logically.

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