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    Precedent 49" Perkasa
    by neilw πŸ‡¬πŸ‡§ ( Leading Seaman)
    πŸ“£










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    πŸ“ Precedent 49" Perkasa
    12 days ago by neilw ( Leading Seaman)
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    After the hull build and getting the deck on I finally started to uses CA rather than epoxy. Certainly sped things up when building the superstructure. The hull still needs the top coats but while I was moving it around the workshop thought I'd leave that until later.

    The aft platform took a bit of getting right, the instructions were useless. I ended up steaming the piece that wraps around the transom platform.

    Steam was also needed for the kick rail. The 1/8" x 1/8" timber supplied was extremely brittle and split even when steamed. The solution was to use new 3mm x 3mm obeche for the aft section and to make up a jig to laminate steamed 1.5mm x 3mm for the forward section.

    At this point the decision was made to paint the hull black below the waterline, many Perkasas are red but I prefer the black, also the decks will be Nato green rather than the lighter, brighter green seen on many models.
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    πŸ“ Precedent 49" Perkasa
    13 days ago by neilw ( Leading Seaman)
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    With the hull built I wanted to fit the motor, ESC etc before putting the deck on.

    Have to admit at this point knowing nothing about motors and ESCs. The last time I was involved in radio controlled motor boats was about 30 years ago when I built a 1:10 model hull of a Naval Picket Boat as a test bed for control systems for my PhD. In those days I had twin Hectoperms, a servo arm controlled speed controller and gel batteries to power a 240v invertor used to run a load of A/D and D/A expansion cards plugged into a 486 laptop linked to a GPS, fluxgate compass and log impellor.

    I spoke to Dave at Prestwich Model Boats and ended up with a Brushless water-cooled 1100kv motor and 150 Amp ESC controller, this obviously meant running the plumbing for the water cooling. There's space either side of the ESC for a 5000Mah 3s Lipo, only one will be connected at anytime but the weight is equalised by carrying 2 batteries and the size of the model allows this.

    I was a bit twitched about not having an off switch with the LiPo so there's an automotive cut off switch from an old Land Rover Winch, look a bit industrial but at least when the key is out the boat is dead.

    I made the decision to use the IA6 receivers on all my yachts so if I have one fail I can borrow one from another boat.

    With everything fitted and working time to epoxy on deck with loads of boxes of brass screws providing suitable pressure.
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    πŸ’¬ Re: Precedent 49" Perkasa
    12 days ago by neilw ( Leading Seaman)
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    The water cooled motor mount came from Prestwich Model Boats. I’ve bolted it to some aluminium section that is attached to an aluminium plate.

    The ESC mount is the same section and plate, the ESC is a tight fit but won’t fall out.
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    πŸ’¬ Re: Precedent 49" Perkasa
    12 days ago by westward ( Petty Officer 1st Class)
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    who's mount is that
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    πŸ“ Precedent 49" Perkasa
    14 days ago by neilw ( Leading Seaman)
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    So, next came the skinning. Probably the most frustrating part to do and the most satisfying when completed. Getting the chine right at the bow was a real pain - narrow laminates and balsa blocks. Had to spend a lot time looking at photos and plans of the real boat as the instructions have no information on the bow shape.

    I was getting concerned as the timber used in the bow was very brittle, I suspect the kit may have spent years on top of a wardrobe in a centrally heated room so the moisture content was low. As it happens they all pulled in OK, though I did add a few screws to hold the bow section in place while the epoxy cured, screws removed after the epoxy cured.

    The epoxy with red/brown micro balloons looks worse that it was. This is a fairing compound so sands really easily. The grey paint is a Hempel Multicoat, thin it by 50% and it makes a lovely primer, reduce the thinning to 20% and it is a nice satin topcoat. Multiple coats were applied and sanded back until the hull was as fair as possible.
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    πŸ“ Precedent 49" Perkasa
    14 days ago by neilw ( Leading Seaman)
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    I was a little concerned that the timber might have warped as the kit probably dates from the early 1990s, so all the keel sections and bulkheads were cut out and checked. I think this have have been a later model as the tooling used to stamp the components may have been a little blunt so cutting skills were put to the test.

    There was one sheet that had warped, mainly impacting on one of the bulkheads so this was dampened down and placed under some heavy tool boxes for a couple of days until it straightened out.

    Once the keel sections and relevant double thickness bulkheads had been laminated it was time to fit all the bulkheads and bow section before adding the stringers.
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    πŸ’¬ Re: Precedent 49" Perkasa
    13 days ago by taffy ( Leading Seaman)
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    Should look very nice when completed.πŸ‘πŸ‘
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    πŸ’¬ Re: Precedent 49" Perkasa
    14 days ago by neilw ( Leading Seaman)
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    Thanks Colin.

    It has been fun to look back at the photos, work started in July, but I'm not rushing. There's a 100 year old sailing canoe in the workshop getting a full restoration so the Perkasa gets worked on when I stop on the other boat. I'll do another few posts later to bring the build up to date.
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    πŸ’¬ Re: Precedent 49" Perkasa
    14 days ago by Colin H ( Admiral)
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    Great start to a vintage classic, looking forward to following your progress.
    Cheers Colin.
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    πŸ“ Precedent 49" Perkasa
    14 days ago by neilw ( Leading Seaman)
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    A few months ago my wife came across a Precedent Perkasa kit in a charity shop for Β£50. I've been restoring classic and vintage racing dinghies for the last 20+ years, have a collection of about 12 pond yachts and have a few r/c yachts, including a Vic Sneed Marblehead, an old 'A' class and a Robbe Jolle. I'd been considering a move into motorised boats for a while so the Perkasa kit looked like the ideal opportunity to start, and the money was going to a good cause.

    I ended up opening it on the floor of the charity shop and saw that it looked like everything was there, but it wasn't until I got the kit home I was able to get it all out and check everything off against the parts list to find out that everything was there.

    Luckily I have reasonably decent workshop kitted out for boat restoration and repair so work could commence.

    You'll have to bear with me when you see the pics of the build. This is my first model so it was very much learning as I went along, found I had to buy some smaller tools than I was used to and did most of the build using Epoxy with micro balloons where appropriate before discovering the delights of Cyanoacrylate.

    I'll put up a few posts in the next couple of days as I've finished the main build, now working on the details. Still have loads to do.
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    πŸ’¬ Re: Precedent 49" Perkasa
    14 days ago by PeterJ ( Able Seaman)
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    Looks like it will be a fantastic model when it is finished, it may take a lot of time for the build.
    I
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