Jump to content

Ed

Members
  • Content Count

    732
  • Joined

  • Last visited

  • Days Won

    17

Posts posted by Ed

  1. At the hen already, fast ride north.

     

    Send it, or sending it has had been around for years. Always thought it had its roots in sending the mail on the fastest stagecoach available, no reference for this so I might have just made it up myself after a few rums

  2. I've got an 8hp Yamaha 2 stroke with the regular prop on it, but really could use a bigger prop for moving the boat (900kg 8.5 multihull) in and out of the berth, reverse is painfully poor with the exhaust coming through the prop

     

    Yamaha website just made me more confused, which prop should I be looking at?

  3. To be fair watercare are pushing forward with the central interceptor sewer. Which will unlock a lot of capacity to split the current system where large rain events cause untreated sewage to go into the stormwater system

  4. That's the one.

     

    A shaft had already been drilled from the seabed down, had a GRP liner installed with a flange on the bottom and a steel end plate, which had all been fully grouted in.

    We drove the TBM underneath it, I think we had 50-75mm clearance. The machine was stripped out, leaving just the steel shell. We then cut a hole in the top of the shell to find the bottom of the GRP riser. I say hole, out TBM was about 3.3m diameter, and the flange was about 2m, so it turned into a pretty big hole, a few rock bolts and some  shotcrete was involved.

     

    We then bolted a transition bellmouth onto the end of the GRP shaft, then used a machined polystyrene form in the tunnel to pour concrete against to make a nice smooth curved path from the horizontal tunnel up to the riser. Needed to be a nice curve as there is up to 6000l/s going though there at full flow if memory serves.

  5. Given the price of that machine you wouldn’t want to leave It behind!


     


    This machine is called Blanche, Waterview was indeed Alice.


    The one still under Mairangi Bay was Amelia Rose, and the Hobson Bay machine was Lily.


     


    This one was specifically designed for retrieval off the seabed, much the same as the ones we did in Christchurch and Dunedin.


    Mairangi Bay however was a different story. Much bigger diameter, and also 30m below the seabed.


    Trying to put in an offshore shaft to recover it would have been prohibitive, both from a cost and ecological point of view.


    Instead we removed everything from inside the machine and just left a steel shell, which was then encased in concrete.

    • Upvote 2
  6. Brand new in the box, only problem is it was bought by a well meaning relative in the UK and sent over.

     

    Hence it's basically useless here as its balanced for the northern hemisphere, and unless you hold it at a funny angle the card doesn't turn.

     

    Ideal for someone going on a round the world cruise.

     

    Will swap for rum

  7. Seems like Iker Martinez is up to his neck in a rule 69 infraction after being found to have illegally modified his Nacra.

     

    My guess is he'll get banned until after the next Olympics at least 

  8. In light of the forecast I thought I’d better post a link to the short courses

    The decision to shorten will be made or not on Saturday morning but just so you have time to prepare. here are the alternatives.

    http://ssanz.co.nz/documents/eventsPDFs/CourseInformationShortonly.pdf

    The SI's and the words in that link say Motuihe to Starboard for the NZ rigging course, but the picture is drawn passing Motuihe to port.

     

    I presume the SI's take precedence....

  9. The constrictor clutches are a piece of cake to release under load, however one of their drawbacks is that they are almost too easy to release under load.

     

    Some swear by them, others swear at them, I'm in the former camp but ymmv

×
×
  • Create New...