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    Haverlock
    Member Stats
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    Member No.#3378
    Registered๐Ÿ“…31st May 2015
    Last Online๐Ÿ“…19th Apr 2019
    City๐Ÿ“Woolwich
    Country๐Ÿ‡ฌ๐Ÿ‡งUnited Kingdom
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    Posts๐Ÿ’ฌ522
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    Recent Activity
    Liked fitting sound module to a tug that has 2 motors and a mixer 3 years ago
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    "that's not a bug its just an undocumented creature." Sir Terence David John "Terry" Pratchett, OBE (28 April 1948 - 12 March 2015)
    Members Harbour
    (Working Vessel) African Queen
    A return to modelling after a long time. Slowly reaching completion. Billing boats kit. The ( plastic) steam engine is motorised and triggered on/off via an electronic switcher. Steam sound unit fitted into ( fake) boiler. Steam whistle sounder switched from same switcher as engine motor. Action switcher. (Motor: HYDRA15COMBO) (ESC: HYDRA15COMBO) (5/10)
    Recent Posts
    ๐Ÿ“ Model boat w gas motor/nitro
    12 days ago by Haverlock ( Sub-Lieutenant)
    Flag
    If you use a fuel that has castor oil rather than synthetic you can say its organic!

    fuel
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    ๐Ÿ“ Soldering
    1 month ago by Haverlock ( Sub-Lieutenant)
    Flag
    if your not used to using a torch please make sure whatever your resting the work on will not burn!! Oh and please remember things stay hot for longer than you might think cooling a soft soldered joint with water is not a good idea allow it to cool slowly. Get a couple of cheap pairs of pliers and some rubber bands to use for clamps if the parts are small and light enough a 3rd hand is useful https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2047675... some examples there.
    https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR3.TRC0.A0.H0.Xthird+hand.TRS0&_nkw=third+hand&_sacat=0
    ๐Ÿ”—

    cooling
    parts
    clamps
    soldering
    e bay
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    ๐Ÿ“ Soldering
    1 month ago by Haverlock ( Sub-Lieutenant)
    Flag
    it seems hard at first but like so many things once you have the hang of things it does get easier. One thing I would say is avoid the lead free solders for starters received wisdom is that its harder to use. For the amounts we use the health hazard is vanishingly small just do not let any kids teeth on your joints.

    soldering
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    ๐Ÿ“ Anteo 2 Tug
    1 month ago by Haverlock ( Sub-Lieutenant)
    Flag
    You can power a brushless from lead acid batteries electric is electric. Lipo batteries are often used because of their ability to provide power with a relatively low weight and can dump LOTS of amps.
    As Colin pointed out 2 6volt batteries in parallel will provide 6 volts and cannot be tapped for 12v to obtain 12v the batteries need to be in series and 6 volts can be tapped off but will only provide the energy from one of the two batteries.

    electric
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    energy
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    ๐Ÿ“ Anteo 2 Tug
    1 month ago by Haverlock ( Sub-Lieutenant)
    Flag
    if your intending to use a car ESC have a good read before you buy some of them require you to select reverse then go back to neutral before selecting reverse again to actually reverse the motor. The first reverse acts as a brake. Just to satisfy my curiosity why did you want brushed rather than brushless? There are a lot of brushless motors used in the model car sport and generally have advantages over brushed motors.

    motor
    model
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    brushless motor
    brush
    esc
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    brushed motor
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    ๐Ÿ“ Planking
    2 months ago by Haverlock ( Sub-Lieutenant)
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    because I am tight fisted and wanted to get my monies worth! ๐Ÿ˜œ

    planking
    wanted
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    ๐Ÿ“ Planking
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    if you can stand the smell get some nappy liners and lay them on the hull then saturate with polyester resin ( + hardener). Once it set hard ( give it a week) you can sand it down with 600 used wet. Gives a smooth finish that is almost invisible. Sealed and hard wearing.

    hull
    planking
    resin
    seal
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    ๐Ÿ“ Planking
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    What type of boat/ship if its purely a sport boat you can cover the planking with tissue and dope then high build primer. Sand it down and paint with whatever takes your fancy. On the other hand if your wanting the planking to show ( scale type model) you need to seal the wood on the outside and inside with a decent varnish that should provide all sealing you need.

    paint
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    wood
    primer
    port
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    planking
    ship
    show
    varnish
    scale model
    seal
    cover
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    ๐Ÿ“ soldering
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    If your using an electric soldering iron avoid " active" fluxes if your willing to use a flame then good old fashioned " killed spirits" is as fine a flux as your going to find for soft soldering.
    Thinking about things if your using an IC engine and your making a prop shroud then please consider hard ( silver ) solder. Just think about the effect of a failed joint and a rapidly spinning prop. if your joining tubes at app 90 degrees think about drilling the tube your going to join to and fitting a spigot to solder the joining tube to. Making a good mechanical joint is an almost essential requirement for a sound long lasting soldered joint.

    prop
    electric
    engine
    drill
    prop tube
    soldering
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    ๐Ÿ“ soldering
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    First rule of soldering is clean it all then clean it again ohh and then clean. Seriously use an abrasive to make sure joint areas are clear of oxides. Presuming your using soft solder get some rosin flux https://www.ebay.co.uk/itm/Soft-Solder-Paste-Soldering-Flux-... one example. Try and make your joints really good fits. Solder will wick into a close fitting joint. if possible " Tin" the individual parts first that is getting a layer of solder onto the area to be soldered before final assembly. Then try to fix your parts together in some kind of clamp they need to be held still until the solder cools. NEVER cool the joint quickly! Allow it to cool naturally that way the joint will be at its strongest. Make sure your heat source is strong enough the solder should melt and run freely. if your soldering brass tube honestly I would use a small butane torch but also I would if possible use hard ( silver) solder since if you chose the right one it is a match to brass and makes the joint look like one piece. Hope this is of some help.
    https://www.ebay.co.uk/itm/Soft-Solder-Paste-Soldering-Flux-Grease-Soldering-Accessories-D01850/111141455814?hash=item19e08c07c6:g:-cYAAOSwnFZXUiS8:rk:13:pf:0
    ๐Ÿ”—

    parts
    soldering
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    ๐Ÿ“ Bending balsa
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    its a VERY well known technique its how we used to make rolled balsa bodies for rubber powered competition airplanes. Back in the day we used spent developing solutions from blue print machines ( ammonia solution). Rolling the balsa sheet around a snooker queue. That is how tight a curve you can get if you give it long enough to soak. Full strength takes a couple of weeks to recover.

    chines
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    ๐Ÿ“ RC circuit
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    View Video
    Since your going to replace your Tx and Rx consider a computer radio like the taranis. Each of your rudder servos can be on its own dedicated channel as can the ESC for each motor. Using the built in mixing functions you can "tune" the setup so as to get the effects your looking for plus you can do things like both rudders moving in opposite directions to give a brake effect. Setting up the mixing looks difficult but once your into it, it follows a logic. https://www.youtube.com/watch?v=Yq_H9vzCz8g&t=21s
    https://www.youtube.com/watch?v=Yq_H9vzCz8g&t=21s
    ๐Ÿ”—
    Taranis/OpenTX Mixing Tutorial
    โ–ถ๏ธ

    motor
    circuit
    rudder
    radio
    esc
    channel
    computer
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    ๐Ÿ“ Painting white metal
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    I found the enamel over acrylic comment interesting I have never had a reaction between acrylic and enamel paints. The only reaction I have seen ( to my chagrin) was cellulose over enamel ( do not do it EVER) enamel over cellulose is fine. Acrylic not using powerful solvents tends to be safe over anything and once "set" pretty resistant to the solvents in enamel paint. However when it comes to a painting sequence I have actually used cellulose ( clear shrinking dope) followed by enamel for base colour then acrylic for details.

    white metal
    paint
    acrylic
    paints
    action
    enamel
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    ๐Ÿ“ Mtronics W-tail marine mixer connections.
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    View Video
    Its really quite simple modern radio systems are computerised so you can do all the mixing you want from the transmitter. No need to buy mixers for the receiver end. Setting things up the first time you do it is confusing I agree but once you have a grip on things it becomes more simple. The good thing about using a modern system is that you can change things on the fly and even have different mixes selectable on the same model and change while your sailing.

    https://www.youtube.com/watch?v=Yq_H9vzCz8g

    there is a video so you can see what I am talking about.
    https://www.youtube.com/watch?v=Yq_H9vzCz8g
    ๐Ÿ”—
    Taranis/OpenTX Mixing Tutorial
    โ–ถ๏ธ

    model
    sailing
    radio
    receiver
    transmitter
    sail
    video
    computer
    system
    mtronics
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    ๐Ÿ“ Mtronics W-tail marine mixer connections.
    2 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    just to add to the fun and games of this thread rather than looking at aftermarket mixers why not go the whole hog and get something like the taranis system. You can mix channels at will and proportionate relationships. This means you can tailor the responses on the mixed channels.

    prop
    channel
    system
    mtronics
    mixer
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    ๐Ÿ“ Paint for Thames River Police Boat.
    4 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    I did contact the curator to see if it was possible to get some data this was the reply

    "Not without knowing the type of boat approximate year etc.....I am currently out of the country and returning in Feb....I suggest the model maker contacts me then with as much detail as possible and I will try and assist.


    Regards


    Rob Jeffries (Hon. Curator)


    "

    So try again in Feb with details and see how he can help

    paint
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    model
    thames
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    ๐Ÿ“ Paint for Thames River Police Boat.
    4 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    One would suspect that since police launches were not a high volume item the colours were " what do we have in stock" rather than a specified shade. A given listed colour may well vary from batch to batch. So its reasonable to presume the actual launches may well have had differing shades of the same colour. Since your building a model even were you to find some of the actual paint used it would look wrong on a model since you should be in effect viewing the model as though it were the full sized article looked at from far enough away to see it at the size you have chosen.

    paint
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    model
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    ๐Ÿ“ Paint for Thames River Police Boat.
    4 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    Have you tried contacting the curator to see if he can help?

    curator@thamespolicemuseum.org.uk

    paint
    police boat
    thames
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    ๐Ÿ“ Proximity (Hall effect) sensor wiring
    5 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    While I accept you had that in mind not everyone would realise the situation. Stating the obvious needs to be done on occasions.

    wiring
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    ๐Ÿ“ Proximity (Hall effect) sensor wiring
    5 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    switching off and on via the ESC switch does NOT disconnect the battery from the ESC just stops the ESC passing current. Power is still being used. The only way to end all current flow is to disconnect the batter by either opening the pos or neg lead from the battery. Mounting the magnet on the end of a screw and having that fit into a threaded hole should deal with the problem of keeping it in place while running.

    wiring
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    battery power
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    ๐Ÿ“ Proximity (Hall effect) sensor wiring
    5 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    I do not know how much knowledge of electronics your friend has but I need to point out that a hall effect sensor is not like a relay. While they do act like a switch ( sort of) they need to be powered and have a hall effect voltage to switch. This would mean in the use intended there would be a current drain on the sensor and if the power supply ( battery?) voltage fell to far it would not function.
    The effect you want could be replaced by a reed relay cheap and simple to use. However reed relays can only pass low currents so would need to be cascaded with a higher rated relay before switching the main battery supply on and off.

    https://www.ebay.co.uk/itm/10-Pcs-2-5X14mm-3-Pin-4W-Glass-Re...

    these reed relays have both normally open and normally closed contacts and at a couple of quid for 10 worth buying so he can experiment.
    https://www.ebay.co.uk/itm/10-Pcs-2-5X14mm-3-Pin-4W-Glass-Reed-Relay-Magnetic-Switches-N-O-N-C-SPDT/372165424048?hash=item56a6c9b3b0:g:vgAAAOSwJtdaL2~p:rk:53:pf:0
    ๐Ÿ”—

    wiring
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    e bay
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    ๐Ÿ“ gas shot off
    5 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    as a first thought if you have a spare channel on your transmitter use it to drive a servo to close a shut off valve it could also function as a valve to prevent accidental gas leakage when connecting everything up. Trying to do it auto is fraught with danger since even if your out of water your still going to have pressure. if on the other hand your wanting to stop the gas if your pressure falls to low why?

    transmitter
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    ๐Ÿ“ All hooked up, nowt happens...
    5 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    first question which no one seems to have mentioned is :- did you have the transmitter switched on BEFORE you powered up the receiver/ esc ? if not de power the receiver and try switching on the transmitter .

    Most of these systems have an interlock to prevent the motor running if there is no transmitter.

    motor
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    system
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    ๐Ÿ“ Metal sanding plates
    5 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l13...
    https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=NT+Sander+&_sacat=0
    ๐Ÿ”—

    sanding
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    ๐Ÿ“ Equipment wire
    6 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    Have a look for intruder alarm wire comes in 4 and 6 core and is stranded as opposed to solid wire which a lot of the telephone wire was ( dunno if it still is)

    https://www.ebay.co.uk/itm/Alarm-Cable-6-Core-White-Intruder...

    if you need thinner still ( and unless the wire is supported VERY well I advise against it ) use wire wrapping wire.

    https://www.ebay.co.uk/itm/0-25mm-Wire-Wrapping-Wire-30AWG-C...

    hope this helps
    https://www.ebay.co.uk/itm/Alarm-Cable-6-Core-White-Intruder-Burglar-Secuirty-Wire-PVC-Insulated/252492643054?hash=item3ac9bbfaee:m:mv4ZmI2-stkMj17vCG6Go4w:rk:3:pf:0
    ๐Ÿ”—
    https://www.ebay.co.uk/itm/0-25mm-Wire-Wrapping-Wire-30AWG-Cable-305m-New-Red-T4D5/123178150109?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D52543%26meid%3D17f03e5b33dd44069a6017a2c126df6e%26pid%3D100005%26rk%3D3%26rkt%3D8%26sd%3D121195610390%26itm%3D123178150109&_trksid=p2047675.c100005.m1851
    ๐Ÿ”—
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    ๐Ÿ“ Is there a way to...?
    6 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    the short answer is YES! however it may be a little more difficult than your willing to undertake I guess you want to allow some one to select full throttle but have limited speed. Depending on your transmitter you may be able to have dual rates on throttle. if not read this article its a walk through on retro fitting dual rates on throttle.

    https://www.instructables.com/id/Add-dual-rates-to-a-channel... href='https://model-boats.com/search?q=tag:transmitter' onclick="loadpage('search?q=tag:transmitter'); return false;" class="taghighlight">transmitter/
    https://www.instructables.com/id/Add-dual-rates-to-a-channel-of-a-transmitter/
    ๐Ÿ”—

    transmitter
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    ๐Ÿ“ Transfers
    6 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    https://www.ebay.co.uk/bhp/laser-decal-paper

    My point was and is using an inkjet requires you to seal the printed item before water slide since inkjet ink tends to be water soluble while laser printer ink is not so its one step saved.

    obviously once in place on a model it needs to have a protective layer of something.
    https://www.ebay.co.uk/bhp/laser-decal-paper
    ๐Ÿ”—

    model
    seal
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    ๐Ÿ“ Transfers
    6 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    its even better if you can get a hold of a laser printer since the "ink" is waterproof so no need to varnish before doing the waterslide.

    roof
    varnish
    waterproof
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    ๐Ÿ“ Brushless motors (again)
    6 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    This looks like a BEAST https://www.rapidrcmodels.com/ntm--4248-650kv-v2-brushless-outrunner-motor-5562-p.asp run it on a 4s battery ( ok go 5s and a smaller prop)
    https://www.rapidrcmodels.com/ntm--4248-650kv-v2-brushless-outrunner-motor-5562-p.asp
    ๐Ÿ”—

    motor
    prop
    brushless motor
    brush
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    ๐Ÿ“ Brushless motors (again)
    6 months ago by Haverlock ( Sub-Lieutenant)
    Flag
    depending upon the type of motor cooling it can be a problem. Most brushless motors are out runners so the case rotates! in runners are usually for higher speed applications (or driving a gearbox). if you have an idea as to the size of IC engine the boat was intended to have then this list may be a help


    .049 or .051 = 100 watts

    0.10 = 200 watts

    0.15 = 300 watts

    0.25 = 500 watts

    0.32 = 640 watts

    0.40 = 800 watts

    0.45 = 900 watts

    0.51 = 1020 watts

    0.61 = 1220 watts

    0.75 = 1500 watts

    0.91 = 1820 watts


    Since Watts are Volts * Amps ( I know this is not accurate for a reactive load like an electric motor but its a rule of thumb)

    This gives you a ball park next point is the KV ( revs per volt) of a motor. The higher the KV the smaller the prop. Finally buy a Watt meter they are not expensive and give you a chance to " fine tune" a setup.

    https://www.ebay.co.uk/itm/FT08-RC-150A-Hight-Precision-Watt...

    Car ESCs ( usually) have a reverse function while the airplane versions do not. They are generally cheaper than boat specific ESCs.
    https://www.ebay.co.uk/itm/FT08-RC-150A-Hight-Precision-Watt-Meter-and-Power-Analyzer-w-Backlight-LCD-U3F1/223101148808?epid=23023179441&hash=item33f1dd5e88:g:LYAAAOSwV3pba1JA:rk:11:pf:0
    ๐Ÿ”—

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