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    cenbeth
    Member Stats
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    Member No.#1546
    Registered๐Ÿ“…13th Oct 2011
    Last Online๐Ÿ“…13th Jun 2022
    City๐Ÿ“Clwyd
    Country๐Ÿ‡ฌ๐Ÿ‡งUnited Kingdom
    Genderโ™‚๏ธMale
    Age๐Ÿ‘ถNot Provided
    Posts๐Ÿ’ฌ225
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    Likes Received๐Ÿ‘73

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    Liked Xmas in September??? 9 months ago
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    Recent Posts
    ๐Ÿ’ฌ Re: Bilge & Circulating Pump Outflow.
    3 months ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    I would have thught that they would be lower so as not necessitate cutting the irons. But hey, what do I know!
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    ๐Ÿ‘€ 160 Views
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    ๐Ÿ“ sail control ????
    6 months ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi,

    On the weight of the keel, may I suggest that you place it in a filled bath and add weight to it until it floats to the waterline? Then remove the weight and weigh them. I take a small amount of the resultant weight to allow for trimming.

    I hope this makes sense.

    Best of luck
    Edward
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    ๐Ÿ“ Servo issues etc
    10 months ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi Dave
    I've stripped the main sail servos out and I've mislead you all. The arm servo is HiTec HS-765HB and the main sail is a Futaba S5801.
    Cheers
    Edward
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    ๐Ÿ‘€ 14 Views
    ๐Ÿ“ Servo issues etc
    10 months ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi Stephen

    I've just measured the model; its 4 foot long pus 15.5 inch bowsprit. It has a 14 inch beam and the draft is about 6 inches plis 4 inches for the bulb keel (detachable)
    Cheers
    Edward
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    ๐Ÿ“ Servo issues etc
    10 months ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi Dave

    I'll try and answer your questions.

    Ch1 Jib (arm) & Foresail (drum)via Y adapter
    Ch 2 Speed controller; Mtronics Viper Marine 15
    Ch 3 Main Sail - Drum
    Ch 4 rudder - normal high power servo.

    The battery splits via a Y lead to the Mtronics and a bus bar that serves the two drum winches.

    All servos are Futaba. I am not aware that Futaba make different drum winches and I've thrown away the boxes. I would have bought the strongest they do at the time.

    The tests done so far have been under a No Load state so the current draw should be minimal.

    Does this help?

    Edward
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    ๐Ÿ“ Servo issues etc
    10 months ago by cenbeth ( Chief Petty Officer 1st Class)
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    Hi Stephen,
    The model is about 4 feet long, plus a bow sprit. It has a beam of about 12 inches. The ballast is about 12Kg. Sorry about the range of units - put it down to my age!
    Yes, it is an auxiliary motor; a monoperm special if I remember correctly. The speed controller is a Milltronics. I can do some pictures but not now; its bed time here!
    The Servomorph P96 is currently unavailable and I'm waiting to hear from Components Shop when they hop to have them.
    Edward
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    ๐Ÿ“ Servo issues etc
    10 months ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Thanks Garry, I'll give it a try. Will they work with the speed controller too? Edward
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    ๐Ÿ“ Servo issues etc
    10 months ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    I am building a twice scale Cariad Bristol Pilot Cutter. I have a Futaba servos for the rudder, main sail (drum), Jib (arm servo) and fore sail (Drum), a Miltronics speed controller and BEC. The Receiver is a FrSky while the Transmitter is a Futaba 6EX-2.4GHz. I have been told that the Transmitter will not work with a FrSky receiver, but it has binded together fine and works on the bench.

    The problem I have is the throw of the servos is not sufficient and the speed controller is either on or off and will not go in reverse. There is no graduation of speed.

    Last time I used R/C was in the early 1980s and that was with 27MHz. I am currently at a loss how I could improve the servos and any advice would be gratefully received.

    The boat is almost ready to go into the water but I need the servos to work correctly.
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    ๐Ÿ’ฌ Re: Scratch built, Working Steam powered Drifter trawler LT100, to 1:24th scale.
    2 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi,

    I know that steam locos have a bypass valve on the water feed pipework to allow the partial return of the feedwater. Would one help with your system?

    I'm enjoying your blog!

    Keep it up

    Edward
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    ๐Ÿ“ HMS Dido
    2 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    HMS Dido did indeed start off life with two twin forward turrets but was soon fitted out with three.
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    ๐Ÿ“ HMS Dido
    2 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    White Ensign do a 1/700 kit. This could be a bit fiddly but the cost would be relatively modest. Deans Marine used to do a 1/96 semi kit and Fleetscale Marine do a 1/128 semi kit too. Personally, I like the Fleetscale one.
    The main difference in HMS Dido to the other ships is the cross-bracing on the foremast and degaussing wires around the hull being exposed. The armorment changed over time too so select the right date!
    Good luck with the build and let us know how you are progressing!
    ๐Ÿ‘ Like
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    ๐Ÿ‘€ 11 Views
    ๐Ÿ“ Casting a lead bulb keel
    3 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Useful information. I'm not sure where I'd get these powders from though. When I designed the plugs I avoided undercuts and had no need to use the mould more than once but if anybody did need to your advice seems more than sound.

    powders
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    ๐Ÿ‘€ 13 Views
    ๐Ÿ“ Casting a lead bulb keel
    3 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Mine were left in the workshop for about a month, possibly longer, before being put in the oven for a couple of hours. The problem with the last casting was that the Plaster of Paris was too old.
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    ๐Ÿ“ Casting a lead bulb keel
    3 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi,

    Iโ€™m sorry about the car. It got copied across accidentally.

    Best wishes

    Edward

    car
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    ๐Ÿ‘€ 15 Views
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    ๐Ÿ“ Casting a lead bulb keel
    3 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    View All
    Please note. The photographs are in reverse order!

    About three years ago I started to make and cast a bulb keel for my wooden Pilot boat, Cariad. Well, I have finally done it but not without some false starts and accidents. I donโ€™t propose to dwell too long on them!

    My first task was to establish how much weight I would need. The boat is larger than the fibreglass hulls produced by Chris Brown. The hull is almost complete and painted so I ran the bath (while my wife was out!) and floated her in it. I then added weights until her waterline looked right then weighed the weight which was just over 13Kg. I decided to make the bulb keel a bit less than this to leave room for trimming the model.

    I how needed to make a plug of the keel. Luckily I have a lathe which simplified the process although you could use an electric drill to turn down the front and rear ends. The density of lead is 11.34g/cc or there about, so it possible to calculate the size I would need using basic maths. I did this in sections, firstly the nose and tail (made from sheets of plywood glued together then turned down on the lathe), then the body (made from a plastic rainwater pipe) and finally the attachment to the hull (from wood). From the total I got the final weight. I adjusted the weight by altering the length of the body.

    The mould needed to be in three parts: two sides and a section to reflect the size of the keel. It was made from Plaster of Paris. To contain the mould I made up some timber boxes and a plywood sheet to hold half the plug to start the moulding process off. This had to be greased well so as to release the plug. To hold the casting to the hull I needed a threaded rod which I originally made from 1/4โ€ brass rod which was incorporated into the moulds prior to casting. Later I changed this rod to stainless steel.

    The first mould I made was a bit damp even though I had let it dry for a couple of months in my dry shed. Too much air bubbles were introduced and the size just didnโ€™t look right. Iโ€™d also included some feeder holes to allow me to fill the lead and for air to escape. They were not successful either because the lead solidified around them. The casting had to be re-melted and the mould re-made.

    For the second mould I made a new plug using a narrower section of drain pipe but the mould was also a bit damp but the main problem was the filling points. Again, they were just too narrow and clogged up with the lead. I decided to do away with the filling points and left the top of the mould open to the air. I did this by cutting the Plaster of Paris with a jig saw and making up the irregularities of the cutting with more plaster.

    The next casting caused me no end of trouble because it leaked like a sieve despite being held together with clamps. I had to stop casing the lead. Because I had about 12 Kg of molten lead to deal with, I didnโ€™t want to leave it as a solid lump of lead. It is better to have a number of smaller bits to add to the melt pot gradually: melt a small quantity first and gradually add other bits. I therefore cast it into small ingot moulds. What I did was cast one ingot, wait a minute for it to solidify then dunk it into a bucket of water to finally cool it which resulted in the ingot and mould separating. The mould would then be removed from the bucket and set aside to finish steaming. Another mistake! I thought it had finished steaming so went to cast another ingot when it exploded and scattered molten around, including over me. I was lucky and only ended up with a burnt left arm and needing to buy another pair of glasses.

    After being severely told off by my wife as well as being very nervous about trying again I again made yet another mould. This one I dried off in the oven (my wife was out!) for a couple of hours at about 140 deg C. This helped no end but I still got a bit of bubbling. However the casting looked alright despite needing a bit of cleaning up.

    Lessons Learnt:

    Use fresh Plaster of Paris
    Grease the plugs before casting the Plaster of Paris, including greasing the mould interface to prevent sticking.
    Make sure your body is well protected, including a full face shield while casting lead.
    Use stainless steel rod as the fixing to the hull. Brass is too bendy/soft.
    Make the filling hole in the mould as large as possible.
    Ensure the mould is as dry as possible before casting

    boat
    lathe
    rod
    plug
    jig saw
    pair
    face shield
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    ๐Ÿ’ฌ The bow blocks & outer keel
    4 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    I read somewhere that if you diagonally plank a hull that can give you concave hulls. I have never done this but would be interested to hear from people who have.

    hull
    keel
    bow
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    ๐Ÿ“ Brixham trawler IBEX
    4 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi Sam,

    Yes, a Monoperm Super I think it is. it is only small as I reckon the original would only have had a small motor.

    I had issues with getting the rudder to work because the rudder shaft is at an angle. Another thing I'm anticipating is the size of the rudder; it may need to be increased in size.

    I think that thinking how problems can be overcome is half the fun!

    Edward

    motor
    rudder
    trawler
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    ๐Ÿ“ Brixham trawler IBEX
    4 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi Sam,

    I guess so. if you want to be technical I suppose you need to think where your centre of gravity is, and where your centre of effort is from the sails etc.

    Are you going to cast the keel or make it up?

    Edward

    trawler
    sail
    keel
    sails
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    ๐Ÿ“ Brixham trawler IBEX
    4 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi Samnewbie
    I have a Cariad which is wooden hulled at twice scale. I decided to use a false keel but as I bought the hull completed needed to retro-fit one. I agree with you! if you can fit the tube as early on as possible it will make life a bit easier. My keel needs to be about 12kg and the tube is a couple of inches behind the mast. I am still trying to cast the keel; I'm now on my fourth attempt!

    I have calculated the keel weight and plan on it being about 1kg lighter than need be. This will allow me to finely trim the boat up once complete.

    Good luck with yours.

    Edward

    hull
    wood
    weight
    trawler
    pt boat
    wooden
    wood boat
    keel
    cariad
    wooden boat
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    ๐Ÿ“ Props
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Clockwise, looking at it from the photo.

    prop
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    ๐Ÿ‘€ 10 Views
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    ๐Ÿ“ Ebay Horrors
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    I can only agree with your advice. I have had similar experiences and would like to add, always pay using PayPal. I know Paypal's fees to a seller are high but this shouldn't effect you. Anyway, I'm glad it worked out for you. Edward

    ebay
    advice
    e bay
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    ๐Ÿ‘€ 9 Views
    ๐Ÿ’ฌ paddle tug Aid
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi,
    I have a copy which I bought new in the early 70s for 60p! There is no ISBN number. The original was published in 1948 so my version is a reprint from 1971.
    Aid looks a nice boat which should make an interesting model. I am looking forward to reading how construction proceeds and the techniques you adopt. Good luck with it!
    Edward

    model
    tug
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    ๐Ÿ’ฌ progress
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
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    Great.
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    ๐Ÿ‘€ 13 Views
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    ๐Ÿ’ฌ progress
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi. Looking good.
    Are you happy that you won't get any water ingress? it looks like the tightening screw will be below the waterline.
    Edward

    crew
    waterline
    water line
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    ๐Ÿ“ Brixham trawler IBEX
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    A detachable bulb keel will result in a more stable sailing experience. The further away the weight is from the centre of buoyancy the better.

    sailing
    weight
    trawler
    sail
    buoyancy
    keel
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    ๐Ÿ“ Brixham trawler IBEX
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi

    With my sailing pilot cutter Cariad, when the hull was largely complete I put her in the bath an put weights in until the waterline was reached. I then weighed the weights. I then tried to make the bulb keel slightly lighter to allow for trimming.

    I would make provision for the bulb keel at an early stage of construction. I didn't do this and it was a right pain!

    Good luck

    Edward

    hull
    sailing
    weight
    trawler
    sail
    waterline
    keel
    water line
    cariad
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    ๐Ÿ’ฌ CERVIA "TUG" 54" (4.5 foot long)
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi,
    I had one of these too although she is now sold. I bought my hull from Greenwich Maritime Models but they are now well gone. She will be an impressive model when finished although personally I would not use an ic engine.
    Best of luck
    Edward

    hull
    model
    engine
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    ๐Ÿ’ฌ Turbine boat
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    Hi Les

    I enjoy problem solving, in essence. Currently I'm building a twice scale Cariad, a Bristol pilot sailing boat. Currently I have a 12kg bulb keel to cast; I'm on my third attempt! Still, it's fun.

    I'm interested to hear how you get on with yours. Do you have any drawings you could put on line?

    Edward

    sailing
    build
    sail
    keel
    pilot boat
    drawings
    cariad
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    ๐Ÿ’ฌ Turbine boat
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
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    Looks interesting! I can guess what some of the things in the photos do, but not all. What dimensions and weight is the completed model?
    Edward

    model
    weight
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    ๐Ÿ“ fire boat
    5 years ago by cenbeth ( Chief Petty Officer 1st Class)
    Flag
    The Joy's of working! I didn't think I'd miss work when I retired but I certainly miss the drawing office and photocopiers! Make the most of your facilities while you can!

    Happy modelling,

    Edward

    model
    fire boat
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    ๐Ÿ‘€ 9 Views


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