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Thread: HOP2IT Mark III

  1. #1
    Join Date
    Jan 2009
    Location
    Melbourne Australia
    Posts
    102

    Default HOP2IT Mark III

    Hi All,

    We finally made a measurement box (nothing clear or fancy just hopefully close enough to size) to make our HOP2IT II design legal and to register it. We had been aiming to complete the box to meet the requirements for the postal event but it just didn't happen.
    Anyway it is now officially AUS308.
    We began to think of another mark II but as usual we started to change everything at once. Hence HOP2IT Mark III.
    Narrower 90mm
    Longer 326mm (there was room in the box)
    Mast step 10mm forward
    More changes to come.

    Regards
    Peter & Clare
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  2. #2
    Join Date
    Aug 2003
    Location
    Logan, UT
    Posts
    169

    Default Re: HOP2IT Mark III

    Thank you for posting the plasns. It looks nice......
    Just one thing, though, would it be possible to add some sort of reference measurement in the plan, to make sure the size is correct, sometimes PDF files change a litlle depending on PDF reader, printer setting .......

    Thank you.

    Gio

  3. #3
    Join Date
    Jan 2009
    Location
    Melbourne Australia
    Posts
    102

    Default Re: HOP2IT Mark III

    Hi Gio,

    We made our templates from the PDF files and they seem to print on size with our printer a Canon iP5300.
    The deck template should measure 321mm.

    Regards
    Peter & Clare

  4. #4
    Join Date
    Jan 2009
    Location
    Melbourne Australia
    Posts
    102

    Default Re: HOP2IT Mark III

    Hull construction.
    Very light 1.5mm balsa deck.
    1mm balsa everything else.
    6mm X 10 mm X 2.5mm thick ply under front of deck for main sheet eyelet.
    10.2g as pictured.
    6mm balsa stem to be added.

    Regards
    Peter & Clare
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  5. #5
    Join Date
    May 2007
    Location
    Rochester, Kent, United Kingdom
    Posts
    30

    Default Re: HOP2IT Mark III

    Hi Guys

    Another great looking boat. As I predicted you are becoming quite prolific designer/builders. I am also glad you are keeping the flag flying for Oz. Your build log, if we can call it that, is fantastic & I hope your presence will encourage other Antipodeans to get involved. The footy scene in Oz seams surprisingly quiet to me, so keep up the good work.

    I suppose you have been too busy developing this design to get some more internet course times since the close of the July event?

    It seems you have another fan in Gio. I also thank you for the pdf’s. I have printed them off, & hope to find the time to build this one. I might try using 3mm depron, a material I have not used before. I’ll keep you posted regarding progress.

    Gary
    Gary.
    GBR 75.
    GBR 13. L’Orange. "Duck"

    GBR 113. The current newcomer.

  6. #6
    Join Date
    Jan 2009
    Location
    Melbourne Australia
    Posts
    102

    Default Re: HOP2IT Mark III

    Hi Gary,

    Glad you like the look of the new boat.

    No we haven't done any more serious times. We have found a group of boat modellers, mainly interested in electric and steam, that we have sailed with a couple of times. http://home.vicnet.net.au/~bmbg/Welcome.html There is one guy with a Marblehead and there are a couple of WeeNips but we have only seen one. We don't think that we are about to convert them to Footys but they put out a couple of buoys and it is fun dodging the other boats and fighting to round the mark first. We probably haven't been following the rules properly (at all) but it is interesting to see if you can squeeze a footy in the non-existent gap at the buoy. We just got sail number 308. We wonder if this means there are 308 Footys in OZ but doubt it. It is a very large place so you could easily never meet another Footy sailor in a very long time.

    You are welcome to the design. The outlines are to size so you will need to allow for the 3mm of Depron. The only frame is placed 10mm aft of bulkhead 1. The bulkheads are only used for the design process and aren't used in assembly.

    We designed and made a number of successful indoor model planes with Depron but never found the building satisfactory or rewarding. The finish is rough at best. There are some people airbrushing designs on their models but they still look like a bit of foam. In OZ there are some very small indoor models made out of 2mm and even 1mm Depron. 2mm would seem about right for a Footy. Depron comes in white and grey here. It would be interesting to see what weight a Depron version came in at.

    The other issue with Depron would be a water tight glue joint at the chines. The model planes were anything but water proof. Mainly stuck together with tape. It will be great to see what you come up with. Maybe it might even go OK in one of the events you have in the UK

    Regards
    Peter & Clare

  7. #7
    Join Date
    Jan 2009
    Location
    Melbourne Australia
    Posts
    102

    Default Re: HOP2IT Mark III

    Latest progress.

    Hull with 3/4oz glass cloth applied to the bottom and sides only with West Systems 105 epoxy and 205 hardener weighs 17.2g.

    Hull as above but with deck cut out and transom re-enforcement in place weighs 16.7g.

    Remaining 3/4 oz glass cloth applied to the deck and transom and epoxy inside for sealing but no weight yet. Still curing.

    Regards
    Peter & Clare
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  8. #8
    Join Date
    Jan 2009
    Location
    Melbourne Australia
    Posts
    102

    Default Re: HOP2IT Mark III

    Hi Niel,

    We haven't ignored your advice re cockpit size. It is just that our version II hasn't got a single drop of water into it despite being out in some very windy conditions. Basically the whole hull under water. Our cover is lined with a foam rubber and then secured with two nylon 3mm screws. It is easy to take on and off and is many times better than the plastic and tape of our first version. Since it has worked once and gives good access to the gear we have given it a second try.

    Regards
    Peter & Clare

  9. #9
    Join Date
    Jul 2005
    Location
    Brooklyn, NY USA
    Posts
    524

    Default Re: HOP2IT Mark III

    Hey you two - What is the weight of the combing and cover together with the screws? My combing and 4" plastic lid hatch weighs in around 5.5 grams installed. The 3" lid version is just over 3 grams. Component weight is a major factor,

  10. #10
    Join Date
    Jan 2009
    Location
    Melbourne Australia
    Posts
    102

    Default Re: HOP2IT Mark III

    Hi Niel,

    Your hatch is certainly lighter than ours.
    Our hatch is made of 0.4mm ply with 3mm x 6mm balsa edges.
    The hatch complete with screws and foam tape weighs 9.6g.
    There would need to be some combing on the deck hole anyway so it doesn't add extra to the overall weight.

    Regards
    Peter & Clare

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