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    Robbe PT15
    by Cashrc πŸ‡ΊπŸ‡Έ ( Midshipman)
    πŸ“£










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    16 Posts 52 Comments 0 Photos 89 Likes
    Most recent posts shown first   (Show Oldest First) (Print Booklet)
    πŸ“ Almost splash time!!
    24 days ago by Cashrc ( Midshipman)
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    Hi everybody! Well, I’m feeling better, and did quite a bit of work on the PT. She’s almost ready, need to button down the guns, add the prop, leak and ballast check and she’s done. Both guns are built and installed, and mixed so I can have both swing at the same time or independently. Took a few pics and I have a function check video to show off the guns. Next update should be the maiden.
    Cash
    Robbe PT15 Function Test
    ▢️
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    πŸ’¬ Re: Almost splash time!!
    24 days ago by Martin555 ( Rear Admiral)
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    Nice work Cash,
    Looking forward to seeing her on the water.

    Martin555.
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    πŸ’¬ Re: Almost splash time!!
    23 days ago by figtree7nts ( Vice Admiral)
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    Hi Cash,

    You've done an outstanding job on her!
    I can't wait to see her in the water!
    Job well done!πŸ‘πŸ‘πŸ‘

    Cheers, Ed
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    πŸ’¬ Re: Almost splash time!!
    23 days ago by Rookysailor ( Lieutenant)
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    What a cracking finish you have on the boat Cash,
    should look great out on the water, 1st classπŸ‘

    Cheers, Pete
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    πŸ“ Under the weather...
    1 month ago by Cashrc ( Midshipman)
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    Hi y’all. Well, the PT15 got a bit stalled as I was a bit under the weather for the last week, and I also didn’t want to progress further until I decided how to β€œdrive” the guns. There was/is a nasty little bug going around the dealership that had many of us sick. No fever, but congestion, lack of energy, coughing up crud, etc. it was enough to slow me down considerably, but not keep me from work. I didn’t run boats this past Sunday as I stayed in bed till well past noon. Anyway, I’m on the mend, still have a bit of this but most of the symptoms are gone, with the exception of coughing up some congestion from time to time. Annoying, but it is what it is. As far as the guns go, I’ve decided to try to direct drive them with a pair of 180 degree servos vs doing the whole pulley and offset servo gig. I’ll lose a little movement, but I’ll gain a much simplified install. More than likely I’ll be working on her after Christmas, and I’ll have pics then.
    Cash

    guns
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    πŸ’¬ Re: Under the weather...
    1 month ago by MouldBuilder ( Lieutenant)
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    Glad to hear you are better.
    I had a similar bug a couple of weeks ago. Just felt drained and unsettled. So much so that I had to take my first two sick days off of work for 25 years.
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    πŸ’¬ Re: Under the weather...
    1 month ago by Martin555 ( Rear Admiral)
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    Hi Cash,
    Glad you are getting better in time for the Christmas festivities.

    Martin555.
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    πŸ“ 1st gun almost done
    1 month ago by Cashrc ( Midshipman)
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    I did a little more work on the first gun this morning, turned out ok. Don’t know if I’m going to take it much further as I might end up getting a pair of resin or plastic Bofors gun kits and using those instead. I’ll build up the second gun to match, then go from there.
    Cash

    gun
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    πŸ’¬ Re: 1st gun almost done
    1 month ago by redpmg ( Lieutenant)
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    Looks pretty good Cash - almost be a shame to replace it . Its a standard 40mm Bofors - if you need drawings for more detail I have some which can be scanned for you.
    Built in 67 for the Japanese Self Defence Force replacing the earlier PT 10 - 35m long and displaced 100tons (info came courtesy of Tamiya on the web !)
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    πŸ’¬ Re: 1st gun almost done
    1 month ago by mturpin013 ( Lieutenant Commander)
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    Im no expert on war ships but I think a piece of equipment that is hand made is far better than a commercially manufactured one and yours look great
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    πŸ’¬ Re: 1st gun almost done
    1 month ago by MouldBuilder ( Lieutenant)
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    I think that gun looks perfect.😊

    gun
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    πŸ’¬ Re: 1st gun almost done
    1 month ago by redpmg ( Lieutenant)
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    Found this while going through my archives - don't know if its any use- Its the Earlier PT10
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    πŸ’¬ Re: 1st gun almost done
    1 month ago by Cashrc ( Midshipman)
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    Thanks for the pics!!
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    πŸ“ 1st gun roughed in
    1 month ago by Cashrc ( Midshipman)
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    Here’s a couple of pics of the 1st gun, bear in mind it’s not finished and needs some detail sanding and another couple coats of paint, plus a few more details. It’s built up from a brass barrel, wood, abs and bits of wire. I really wish Robbe had gone to a styrene kit of parts for the guns, but they didn’t. I figure the decision making process sounded like this:
    β€œHey, Gerhardt, here’s the plans for the gun moldings for the new PT were putting in production soon, waddya think?” β€œWell, Kurt, that looks sehr gut, but the boss says we have to use up existing stocks before making any new moldings.” β€œSoooo....we have to design a gun from bits of wood, brass, and abs?” β€œJa”.🀣

    gun
    guns
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    πŸ’¬ Re: 1st gun roughed in
    1 month ago by MouldBuilder ( Lieutenant)
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    See your point but it looks good anyway.πŸ˜€
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    πŸ’¬ Re: 1st gun roughed in
    1 month ago by redpmg ( Lieutenant)
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    Hi Cash - pretty good so far - sure you will super detail it detail it in your usual style - as you say pity they did not use mouldings - but its a pretty old kit - first saw one in the 80's and Robbe probably felt there was no reason to update the kit.......

    kit
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    πŸ’¬ Re: 1st gun roughed in
    1 month ago by Rookysailor ( Lieutenant)
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    See what you mean Cash, but it should be fun detailing it all, like the ammo boxesπŸ‘

    Cheers, Pete
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    πŸ’¬ Re: 1st gun roughed in
    1 month ago by figtree7nts ( Vice Admiral)
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    Hi Cash,

    I like it! πŸ‘

    Cheer, Ed
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    πŸ“ Ready for guns
    2 months ago by Cashrc ( Midshipman)
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    Hi y’all..just a quick update, the railings and most of the deck details are done. I need to give the rails another coat of paint, maybe paint the chains (need to decide color, want it to contrast with the light grey) and then I’ll starts building the guns. Need to decide early on if I want them to traverse, or if I want to add that feature later.

    guns
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    πŸ’¬ Re: Ready for guns
    2 months ago by Martin555 ( Rear Admiral)
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    Hi Cash,
    If it was me I would make the Guns operational at this stage.
    Then you won't have to change the Ballast after trimming the Boat.
    You could always connect them up electrical later if you wish.

    Martin555.

    Guns
    Boat
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    πŸ’¬ Re: Ready for guns
    2 months ago by Cashrc ( Midshipman)
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    Think that’s a good idea, or at least add some removable weight to simulate the servo weight. The plans show a servo with a large pulley driving a smaller pulley on the gun, this way you have a 120 degree servo driving the guns roughly 270 degrees, but I might see if I have the room to just direct drive the gun with a modified servo, or a store bought 270 degree servo

    gun
    guns
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    πŸ’¬ Re: Ready for guns
    2 months ago by RNinMunich ( Fleet Admiral)
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    Hi Cash,
    "The plans show a servo with a large pulley driving a smaller pulley on the gun, this way you have a 120 degree servo driving the guns roughly 270 degrees, but I might see if I have the room to just direct drive the gun with a modified servo, or a store bought 270 degree servo "
    When faced with the same conundrum on my destroyer many years ago I found that gears were a better, more reliable option. Repeatable movement, easier than modding servos, and much cheaper than buying special servosπŸ˜‰
    Slowing the servo travel down is recommendable though, otherwise the barrel twitches back an forth like a fly swatter!πŸ€”
    Pic shows X and Y turret drive. The pulley drive to Y gun tends to slip☹️ as the pulleys are smooth, almost polished so little grip. Mod required!
    Cheers, Doug 😎
    PS the mountings are ball races left over from car restoration daysπŸ˜‰

    gun
    guns
    pulleys
    Y gun
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    πŸ’¬ Re: Ready for guns
    2 months ago by Cashrc ( Midshipman)
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    Thanks Doug, I’ll keep that idea in mind. I’m also thinking checking out some robotics parts house as they have some gears and belts that are made to be hobby servo driven.
    Im telling y’all right now, don’t be surprised if I end up with some 1/35 scale resin or plastic Bofors gun kits on this boat in lieu of the kit supplied parts. The guns, as supplied, are a bit β€œchallengingβ€πŸ€£

    kit
    guns
    boat
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    πŸ“ Torpedos off the starboard bow!!
    2 months ago by Cashrc ( Midshipman)
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    Hi y’all. I have the torpedos and tubes painted and fitted to the deck, and did the aft railings too. I simplified the torpedo install, there’s a number of brass wire clamps you have to make up, paint and install, but after looking at both the box art and other PT15s built, most people omit them, and on the few boats that have them they’re hard to see, hidden for the most part. Figured they weren’t worth the time and trouble.
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    πŸ’¬ Re: Torpedos off the starboard bow!!
    2 months ago by Martin555 ( Rear Admiral)
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    Hi Cash,
    She is looking really good.
    Well done.

    Martin555.
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    πŸ’¬ Re: Torpedos off the starboard bow!!
    2 months ago by MouldBuilder ( Lieutenant)
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    Super looking boat.πŸ˜€
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    πŸ“ Some deck fittings
    2 months ago by Cashrc ( Midshipman)
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    Hi all. Got a bit more done the past couple of nights. Built and installed one hatch, glued and painted ammo cans and built the life raft canister supports, painted canisters and installed the assembly’s. Working on torpedos now.

    hatch
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    πŸ’¬ Re: Some deck fittings
    2 months ago by Martin555 ( Rear Admiral)
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    Nice work Cash.
    Keep it up.


    Martin555.
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    πŸ’¬ Re: Some deck fittings
    2 months ago by figtree7nts ( Vice Admiral)
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    Hi Cash,

    You are doing a great job on her!
    Keep up the good work!

    Ed
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    πŸ“ Superstructure done (for now)
    2 months ago by Cashrc ( Midshipman)
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    Hi everybody. Will keep this short and sweet, have to hit the hay. Superstructure pretty well done, mast installed and a couple of details added, and I decided to go ahead and install the running lights. She’s looking almost shipshape now!!
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    πŸ’¬ Re: Superstructure done (for now)
    2 months ago by Martin555 ( Rear Admiral)
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    Hi Cash,
    She is coming to life bit by bit.
    Nice work.
    Well done.

    Martin555.
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    πŸ“ Aerials and masts
    2 months ago by Cashrc ( Midshipman)
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    Hi everybody!!! Great weekend so far, drove the Studebaker this morning, saw β€œFord vs Ferrari” with my family (great movie btw) and had time to work on the PT. I did the side aerials last night, got the mast about half done today. Now, if you’ve kept up with this blog you’ll find that I just don’t like making small detail parts from wood, unless it’s supposed to look like wood. The side aerials are supposed to be glued into small pieces of wood that are rounded and fitted to the side of the fwd cabin so that the aerials are about a 20 degree angle. Nope. Not doing that. I have a small stock of various sizes of carbon tube, it was easier and I think, better looking to cut a small piece, sand the angle in, glue that to the cabin and insert the wire for the aerial. Also, Robbe recommends that you put a loop in the aerial end for safety. I used small thrust buttons for rubber model planes glued to the tip. I think that looks better.
    The mast was started today, I substituted 5mm carbon tube in lieu of the 5mm wood dowel, everything else is kit supplied. I think the superstructure will be done by Monday evening, maybe Wednesday latest.

    cabin
    kit
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    πŸ’¬ Re: Aerials and masts
    2 months ago by Martin555 ( Rear Admiral)
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    Very nice work Cash.
    With all of those aerials fitted please be careful that you don't poke your eye out.

    Martin555.
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    πŸ“ Railing at the rails!!
    2 months ago by Cashrc ( Midshipman)
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    Hi all. Did a bit more the past few evenings, got most of the railing installed. I really think next time I build a boat with hand rails and the like I’ll build up the superstructure, locate and drill all the holes THEN paint the cabin and install the railings after. I think 20 percent of the time I have in this is correcting any scratches and errant glue dobs that seem to haunt my work. Anyhow, a couple more small details then it’s antennas and mast.
    Cash

    boat
    hand rails
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    πŸ’¬ Re: Railing at the rails!!
    2 months ago by Martin555 ( Rear Admiral)
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    Hi Cash,
    To me the detail work is the most interesting part of the build and starts to bring the boat alive.
    You are certainly starting to bring you'r boat alive.
    Well done, nice work.

    Martin555.
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