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    HARTLEY FLARELINE, NEW PROJECT
    by jbkiwi πŸ‡³πŸ‡Ώ ( Fleet Admiral)
    πŸ“£










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    πŸ“ HARTLEY CABIN BOAT, MUSIC INFRA RED CONTROL EXTENSION
    2 months ago by jbkiwi ( Fleet Admiral)
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    Just received my sack of infra red pick-ups today and had a crack at fitting an extension to the one on the board. The extension is needed as the BT/IR music board is now hidden under the front bunk, and the IR pick-up on it can't be seen by the remote. The extended pick-up is now mounted above the dash and should be in a good position to receive a signal. Works really well, even with the original still in place, (Graham was right, and no smoke😁) I did order a spare board just in case😊, but can now use that in something else.
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    πŸ’¬ Re: HARTLEY CABIN BOAT, MUSIC INFRA RED CONTROL EXTENSION
    2 months ago by jbkiwi ( Fleet Admiral)
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    Hi Martin, I did see the question but thought I'd wait for the new bits to arrive and I can do a sort of exploded diagram showing what bits go where. There were a number of wires soldered on this one which might have made it confusing. I have a new board(with remote) and a spare remote as well which should be here soon.

    Re a larger scale Hartley, I've already had the largest scale version possible, but it wouldn't fit in my modelling room now😁lol Not sure what to do next, as I have a number of projects to try and finish (one includes fitting a Seagull Silver Century motor in a Chrysler 15hp casing) I've just disassembled the old Chrysler motor today ( it did run but parts are impossible to find these days) Plan is to cut the drive end of the crank off and adapt the Seagull drive to it. I've already made an adapter plate for the motor. The idea is to have a proper forward and reverse and neutral and to make it quieter (Seagulls are pretty noisy on a long run) Just a bit of fun!😊 If the the Seagull doesn't work, a Chinese air cooled 4 stroke might be next.

    JB
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    πŸ’¬ Re: HARTLEY CABIN BOAT, MUSIC INFRA RED CONTROL EXTENSION
    2 months ago by Martin555 ( Fleet Admiral)
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    Hi Jb,
    RE :- I did order a spare board just in case😊, but can now use that in something else.
    Could it be a larger scale Hartley Flareline ?

    I think you must of missed my question i had asked a little further down. ( a possible Thread/How-To)

    Martin555.
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    πŸ“ HARTLEY IMPROVEMENTS,- RADIO
    3 months ago by jbkiwi ( Fleet Admiral)
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    Just fitted my small BT player under the front cabin roof to use as a radio. It plays through the BT board but requires an aerial. I have made a working aerial using a spring as a base (so it can be folded down) and a wire soldered to the wire aerial and fed through the spring and through a hole in the cabin. it is attached to an adaptor plug which plugs into the BT player. Works very well and does not require unplugging to remove the cabin. player will only need removing for charging.

    I will now be able to play music from a micro SD card on the BT board using its' remote, from the card in the player via the BT board and the radio in the player via the BT board.

    The BT board will be hidden under the front bunks once everything is sorted, (hopefully with an afore mentioned IR pick-up extension for the remote to 'see'. I've ordered a sack of IR pick-ups from AlExp to try, and another BT board in case smoke leaks out.
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    πŸ’¬ Re: HARTLEY IMPROVEMENTS,- RADIO
    3 months ago by Martin555 ( Fleet Admiral)
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    Fleet Admiral JB,

    Nice work.

    When your bits and pieces arrive would it be possible to do a small Thread or 'How-To' on how to connect up the sound system with photos and how to program it to put the music on.
    And where all the equipment could be obtained from.

    This will be something that many members might like to fit in their boats, it will also help new guys to the hobby.

    Martin555.
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    πŸ“ HARTLEY FLARELINE, MUSIC FITTED
    3 months ago by jbkiwi ( Fleet Admiral)
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    I've trial fitted a twin speaker BT module which is powered by a 1s LiPo. Speakers are 8 Ohm .25W (the board has a 3W max output) I was thinking of fitting a small amp to it, (as per Grahams suggestion) but it can produce some reasonable volume, depending on the recording level. If the recording was done at a high level, the volume will be louder, (as I've found with transferring my vinyl to flash drive, - tapes are a bit harder to do as they tend to be a bit duller- especially after 40 yrs 😁) I'll see how it sounds on the water.

    Music is running off the micro SD card in the vid, but I can also use BT to transmit from the phone radio, - or music (on micro SD card) and radio from my small BT player (small red player in pics). The remote works with the card inserted in the board, and anything else is by BT. Quite a lot of fun playing with this. Had it running for around 5 hrs from the card and only used .2v from the 2200 mAh LiPo ((1 cell from a dud 3s) I have a 1s 2000 mAh from a vape machine which is a lot smaller and lighter which I would use on the water.

    The board has a limited equaliser, volume, fast fwd/back, next track (by button or numbers, on off etc. Quite amazing for its' size. I have 170 entries on the card at the moment,(mostly album sides with a number of single songs) which took a bit of sorting out. The board sorts/plays them in a haphazard way, which didn't match the order I recorded them in (or alphabetically) ?? I have them all numbered on a sheet of paper now to make a song/album easy to find.

    I was thinking, that once it's all tucked away in the boat, I might extend the IR pick-up for the remote, to somewhere more easily 'seen' by the remote (perhaps on the dash) I've found the same pick-ups on AlExp for a few dollars a bag of 10, (I'll need them, as the pick-up on the board will be destroyed if I take it off. Something else to play with if I get bored.

    The speakers are hidden under the galley top and in the 'head' compartment, in wedge shaped boxes, which will be trimmed and painted before screwing into place. All wires are fitted with JST plugs in case things need removing, and board will probably be fitted in one of the forward bunk boxes (if I can extend the BT pick-up) otherwise the board may be disguised as a squab.

    Roy Phillips (The Peddlers) is still living here (been here since 81 and he's cracking 80)
    BT board testing
    ▢️
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    πŸ“ HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by jbkiwi ( Fleet Admiral)
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    I needed to be able to carry everything together, to places I might like to try for a better launching video. Problem was/is that there is a 100m or so down a beach to a spot which I discovered, which looks like an ideal area to have a 'play'. If I couldn't carry everything at once, it would be too dicey to make a few trips,-leaving pieces unattended in a public area, out of sight for 5 mins each trip. Therefore the boat box was knocked up, mostly from bits I had left over from house projects. Mainly 5mm ply with 18x18 pine framing.

    The trailer sits on blocks to raise it slightly so as not to flat spot the tyres when stored, and is held in place by a screw at the front and 2 notches at the back. There are Formica 'locks' at the back which turn over the trailer frame at the back to hold it in the notches. The boat is lowered in complete with the trailer, with the help of a cord with a 'spreader bar' at the back The trailer is 'locked' in place then the tow car and radio shelves are inserted.

    The boat and tow car are held in place by sponge pads on the lid, (the tow car springs help hold it still as well, as the lid pushes down on the roof a few mm) There is a shaped piece of thin cardboard which slides down the back of the tow car and folds over the roof,-just to stop the lid restraint cord catching on the tow-bar. Everything fits in with 2mm to spare height wise. The box has a rope shoulder strap for carrying short distances, (needs some padding) but I am looking for some large pram or golf trundler wheels for 'long distance travel' ( some of the prams have clip on/off wheels which would be useful,- might have to buy a complete pram to get the bits)
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by jbkiwi ( Fleet Admiral)
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    Pretty much Martin,πŸ˜‚

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by Martin555 ( Fleet Admiral)
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    Jb,
    Dose your plane have the same amount of pieces as that Jigsaw LOL!!

    Martin555.
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by jbkiwi ( Fleet Admiral)
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    Don't worry Martin, it's all well secured and padded, and will only be going on soft sand mostly. I can carry it reasonably easily with the shoulder strap if needs be. I see you haven't lost your sense of humour😁, and yes, the plane now fits nicely in a shoe box, just have to assemble it at the flying site πŸ˜‚.

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by Martin555 ( Fleet Admiral)
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    Jb,
    Thank's
    The only thing about having wheels attached to the box is vibration.
    Will it shake the contents of the box in to sizes to match your plane. LOL!!

    Martin555.
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by jbkiwi ( Fleet Admiral)
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    Hi Martin, nice to have you back! You are right, one of those electric golf trundlers would be ideal ( a lot of Chinese use them here,-lazy buggers, more money than sense)😁 Thought I might just use wheels at one end, as I might not be able to get too much in the car with the box in there. I'll see how I get on once I get the opportunity to give it all a try, (rubbish weather at the moment, even rain!!! wooha, )- need it as the ground is like concrete with large cracks a foot deep!

    Not sure what's next, (maybe rebuilding the last plane I built, and just test flew for the first time since I built it early last year,) - didn't end wellπŸ˜‚,- lots of bits,- my wing design was flawed, See before and after pics for a laugh. At least the fuselage stayed in one piece and can be re-used. Back to the drawing board πŸ˜€ Can't make up my mind on future boats yet, - still thinking.

    I now have sound in my 'Jeep' towing vehicle, which is another mod, (I seem to be obsessed with adding stuff) (vid) and I'm waiting for a good day to try another video (never satisfied as it's hard to get things spot on by yourself, - operating a video, boat and tow vehicle all at once is a mission in this case!, especially while trying to keep yourself and your shadow out of the shot. All that stuff keeps you busy which is the main point I suppose😁.

    Don't over-do it trying to catch up all at once, will you?!

    JB
    RC 'JEEP' 2WD 1/8 SCALE HOMEBUILT, WITH 'GT POWER' SOUND FITTED
    ▢️
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by Martin555 ( Fleet Admiral)
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    Hi Jb,
    Well i have done a bit of catching up on this project and the amount of experiments and added bits is amazing.

    Even the transportation case is fantastic.
    I can see a modified RC Golf trolly being used/attached to this case to save you carrying it.

    So is it a secret as to what the next project will be ?

    Martin555.
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by jbkiwi ( Fleet Admiral)
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    Now there's an Idea Graham !πŸ˜πŸ‘ - perhaps powered by a small 4 stroke mower engine with a centrifugal clutch, 21 speed Roadranger transmission..............😁 don't get me started lol.

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by Graham93 ( Commodore)
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    Hi JB,

    Nice box. What you need now is to put wheels on it and attach it to an RC truck like this πŸ˜‚πŸ€£

    Graham93
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by jbkiwi ( Fleet Admiral)
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    Hi Peter, box is not really flash, just made for the job. It's always a problem moving countries with models. I spent days packing a number of planes, boats and a helicopter back in the late 70s to take them back to NZ from Norfolk Island (only about 500 miles away), and when I got to the customs here in NZ, they made me take them all out (even had to undo a few kits) so they could look inside them😠, no way I could get them packed up again. Had to try and carry a huge mess on a trolley to the waiting car. I'll be interested to see how you get on with yours. Sometimes I've found, that good strong cardboard boxes with polystyrene sheet side packing, and then filled with polystyrene packing chips does the trick, -recently sent 2 helicopters I sold, down south like that, and they arrived in one piece.

    Problem is, unless you can take them in a car with you, you don't know how people will treat them. Moved possessions to and from Fiji by ship about 20yrs ago, and had some things clearly marked ''don't stack anything on top-fragile!!" made no difference at all, came flattened anyhow, (luckily not too much damage due to me packing them really solidly, (lots of padding, tape etc) You can never pack well enough for idiots! Wooden crates are the best, but you pay for the weight. Good luck with your move.

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE, TRAVEL BOX
    4 months ago by MouldBuilder ( Commodore)
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    Even the box is the Bees Knees. I will be making a box to move Dusseldorf to Hungary. There will be a picture on my retirement thread but I almost feel embarrassed to post it even though I have not made it yet. I am afraid that yours is much nicer than my effort will be.
    Peter.😁
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    πŸ“ HARTLEY FLARELINE, TOW VEHICLE MODS
    4 months ago by jbkiwi ( Fleet Admiral)
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    Just tried the new 'handbrake' on the tow vehicle with the boat attached and it works 100%. Will actually stop the whole unit while rolling down the slope, and with a bit more weight in the back of tow vehicle, it should be good for another launching attempt at a proper ramp. Answering your question Steve, water seems to make little difference, (actually seems slightly better)
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    πŸ’¬ Re: HARTLEY FLARELINE, TOW VEHICLE MODS
    4 months ago by MouldBuilder ( Commodore)
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    Great photos JB. That really looks perfect.
    Peter.πŸ‘πŸ‘
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    πŸ’¬ Re: HARTLEY FLARELINE, TOW VEHICLE MODS
    4 months ago by jbkiwi ( Fleet Admiral)
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    Thanks for the kind comment Steve, it is a trailer boat after all and I thought a stand wouldn't look quite right. I actually towed the original with a Farmall 'A' which I had done up, but there are no scale RC tractors that big, which is a shame as I think it would have looked better. Might find one one day.

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE, TOW VEHICLE MODS
    4 months ago by stevedownunder ( Sub-Lieutenant)
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    Great looking setup JB,

    Cheers,
    Stephen.
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    πŸ“ HARTLEY FLARELINE, TOW VEHICLE MODS
    4 months ago by jbkiwi ( Fleet Admiral)
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    I know it's not a boat, but it's attached to one 😁 - I've been trying to do a decent trailer launching vid, but have had a problem with the vehicle having no 'handbrake' to stop it (and the boat) rolling back on the big boat ramps which are quite steep. It's also hard to find just the right spot where there are no people, nice slope to the water etc. I have now come up with a simple driveline brake (think Landrover) which works pretty well on the vehicle (yet to see if it will work with the weight of the boat and trailer,- could need a lump of lead for traction). The cord is wound round the driveshaft so that in reverse, once the servo pulls on it,
    it automatically wants to tighten itself and grips quite well.

    The servo is plugged into the rotary switch on the TX,but so the braking can be applied gradually for control when backing down the ramp (at least that's the theory😁) another turn or two on the shaft will multiply the braking effort if necessary. The vehicle is also very low geared 1000 RPM@12V geared motor and the diff is about 4:1 so will idle up the slope in the pic. Tows the boat and trailer easily ( about 8lbs) but could do with a bit more weight for traction (vehicle weighs 1.8kg).

    Always something to play with, improvements to make😁
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    πŸ’¬ Re: HARTLEY FLARELINE, TOW VEHICLE MODS
    4 months ago by jbkiwi ( Fleet Admiral)
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    Hi Steve, only one way to find out I guess, although it shouldn't need to go in the water more than up to the rear axles to launch (especially in salt like the first attempt) - would depend on the slope. Going to give it a go on the back path this arvo with the boat on. Even if it got wet, it should be good enough to hold the vehicle and trailer once the boat is launched. I'll test your thought out as well.

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE, TOW VEHICLE MODS
    4 months ago by stevedownunder ( Sub-Lieutenant)
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    Ingenious JB,
    Will it still work if the cord gets wet?

    Cheers,
    Stephen.
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    πŸ“ HARTLEY FLARELINE JET, MORE COOLING MODS, -BATTERY
    5 months ago by jbkiwi ( Fleet Admiral)
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    Just another little morsel (re Monty Python) the boat is getting a bit like Mr Creosote from all the mods😁. This latest one is to cool the battery, as the 25c 3s got a bit too hot on the test run, being enclosed in the rear seat box. I have now hooked up another thermostat system with a cooling fan in the box, ( the other one is on the motor fans). I have used a 5v fan and reduced the 3s power to it with a small voltage regulator (same as all the others used) and interrupted the pos lead from the battery (JST plug is spliced into the battery lead and hot melted onto the XT60 plug) with a 30 deg C thermostat.

    If the battery temp exceeds 30 deg C, the fan starts, and will not turn off till the temp reaches 28 deg C, (may not cool completely with the motor in use, but it's better than nothing). I will be buying a higher C battery to replace the 25c (probably 40/45c ) which should stay cooler, - especially with the fan. Have also shortened the battery leads to make it easier to fit. The thermostat is just taped to the battery with a piece of masking tape, after the battery is fitted.
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MORE COOLING MODS, -BATTERY
    5 months ago by jbkiwi ( Fleet Admiral)
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    Gidday Steve, trying to wean it off the Tim Tams and Tooheys export Pilsner but it's not working πŸ˜‚. Can't take it near a cake shop !😁 I'll need an even bigger motor soon😁.

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MORE COOLING MODS, -BATTERY
    5 months ago by stevedownunder ( Sub-Lieutenant)
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    Hi JB,
    Great work.
    Don't let any after dinner mints come near your boat!!!🀣

    Cheers,
    Stephen.
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    πŸ“ HARTLEY FLARELINE, JET. COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    I have now fitted the new water pump pick-up (bottom skin fitting) and re-directed the pump plumbing to that. Have also fitted a new water exit fitting in the transom for the ESC water (now taken from the jet pick-up) All seems to work pretty well now, with the pump water now being continuous at 'idle' (previously stopped when the jet stopped) and the ESC water increasing with throttle (see latest vid).

    Careful when you look at 'spaghetti junction' (aka Medusas' hair) might cause hardening of the arteries, or body partsπŸ˜‚

    List of spaghetti 'boatognese' ingredients,-

    5 voltage regulators (lights, nav and interior, air pump, e-cig smoke and cooling fans)

    3 servos (1 micro for switching lights) 1 for bucket and 1 for steering

    1 electronic switch

    1 3000kva motor

    1 60A ESC

    1 ESC cooler

    1 9 ch RX

    1 Air pump

    1 Water pump

    1 Twin fan dummy motor (with thermostatic switch added for fans)

    1 Gt Power sound unit

    1 'Grahams' Brand' 'Smokomatic' timer

    1 E-cig smoke unit

    1 large cup of of wire

    2 dozen plugs

    Lashings of tube

    1 3s 2200mAh Lipo

    1 1s 1000mAh LiPo (lighting is on separate system)

    Think that's about it😁
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    πŸ’¬ Re: HARTLEY FLARELINE, JET. COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    Hi Graham, it would probably go a hell of a lot better if I took it all out, - but then it wouldn't be as much fun😁 A good percentage of that mess is to do with the smoke system, but it seems a shame not to use one after all the experimenting to get one working nicely😁

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE, JET. COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    Hi Stephen, could have been a lot neater, but it's all labelled and under the floor out of sight. Started out simple then sort of grew 😁. The latest vid should be in the site media section. How's it going virus wise in your neck of the woods?

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE, JET. COOLING MODS
    5 months ago by stevedownunder ( Sub-Lieutenant)
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    That is a lot of gear JB.
    I couldn't find the latest video.
    Great work.
    Cheers,
    Stephen.
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    πŸ’¬ Re: HARTLEY FLARELINE, JET. COOLING MODS
    5 months ago by Graham93 ( Commodore)
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    JB,

    Certainly looks β€˜fully loaded’ now ! And you’re worried about my build imitating the Vasa πŸ˜‚πŸ€£
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    πŸ“ HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    I found with the new motor, that the 60A ESC was getting a bit too warm as it has no air flowing over it, and due to the space restriction I can't fit a fan. I decided to knock up a simple water cooler for it, but due to not having a thick piece of ally plate 'in stock' and that we are on restrictions till tomorrow, I had to make do with some 4mm ally strip and make it in 2 pieces.

    It was cut to 25x25mm and end drilled at opposite corners, with both pieces clamped in the mill/drill. I then milled each piece about 2mm deep, and drilled and tapped the center 3mm to screw it together. The 4mm copper tubes will be glued in with a firm grey silicone engine gasket maker, which will be applied to the outside edges as well, then all screwed together. It will be strapped to the ESC, and water fed from the jet unit pick-up, which should push it around nicely when running. (could have used small stainless c/s screws through the bottom plate and screwed it to the fins, but would have been difficult to remove later if necessary)

    I'm going to make a separate pick-up at the stern for the water/smoke system, as it previously stopped feeding when the jet was stopped, even though it was using a pump , (I want it going while the 'engine' is idling). One more thing for the 'spaghetti junction'😁
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    Re Spaghetti junction Rob, a bit like Medusa, - you might turn to stone if you look at it, lol.

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    Would have liked to have made a solid one Graham, but this virus forces you to go through your "I'll keep this in case I need it someday" bins, - amazing what you find that you've forgotten aboutπŸ˜‚

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    Thanks Rob, -loosing count of the mods now😁 (and running out of room)

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    Not sure if mine are the same, (this is branded as a 'Flyermate'-waterproof ) but I've used a lot of these types in planes (up to 120A, - bought them from RC Echo in Hong Kong) and they seem to take a thrashing (and they are cheap!) The 'Red Brick' ESCs HK sold are the same breed, just in red heat shrink. I have 4 of those (60A) in a quad ducted fan experimental 'space ship' so I have plenty of spares if the smoke leaks out of this one.😁

    JB
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by jbkiwi ( Fleet Admiral)
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    Hi nasraf, thanks for the info. These ESCs actually have a thermal cutout and usually a small fan screwed to the fins is sufficient to cool them. As mentioned, I would have fitted one but it wouldn't fit under the floor, hence the water cooling idea, (just something to take a bit of heat away. It probably won't get too hot anyhow, as I won't be thrashing it too much, due to the fact it's only using a 3s 22ooMah LiPo to power everything (motor, water pump, air pump smoke and motor fans.) Water air and smoke can be switched off with Grahams clever timing switch so don't need to run constantly while out on the water)

    That's another thing to find, - a larger 3s battery which fits in the rear seat compartment, (think one of the car series may fit)

    I'll be checking the ESC when I get a chance to run the boat again on the pond, which will give a better idea, as the tank test is static and loads everything up abnormally, (same as planes with static Amps test,- set up on the ground to about 80% of max (battery, motor, prop) then once in the air it will unload to a safe level.

    Just re plumbing everything at the moment, -have installed a short water pick-up in the bottom for the water pump (was on the jet pick-up) and plumbed the jet pick-up to the ESC cooler, (hopefully it will push water through it). A couple more holes to drill for a new exit fitting and hose, and it should be ready for another test.

    More tubes! I need a bigger boatπŸ˜‚ - it's and electrician and plumbers nightmare lol.😁
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by nasraf ( Chief Petty Officer 1st Class)
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    I forgot to attach the pictures.
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by nasraf ( Chief Petty Officer 1st Class)
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    Nice heat sink but I would have concerns on how well the heat will be conducted out of the switching transistors. I have had failures before getting them into a boat, with these Chinese ESC's.

    I took one failed one apart by removing the shrink sleeve that holds the PCB mounted switching devices against the heat sink. Between them is an aluminium foil label. This arrangement does not allow a lot of air to get to the fins of the heat sink or provide a very good heat path out of the switching devices, there are a total of six, I assume they may be operating in parallel for the three switching channels. I do not know much about the theory of brushless dc motors, so do not know what their back emf characteristics are, but they are very unlike a brushed motor in that the speed is changed by altering the switching frequency and possibly if there is no back emf, the current switched does not vary much with speed, rather like the squirrel caged motor where the current is nearly constant with load and the power factor changes, this gives a problem due resistive losses.

    I have attached some pictures of one of my failed ESC, showing the construction. If you do not mind butchering your one and cutting off the shrink sleeve and attaching the PC assembly directly to your water cooled device, preferably with some heat conducting paste, it might stand a better chance of surviving.

    I shall watch with interest, as usual, your progress with water jet power.
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by robbob ( Admiral)
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    Hi JB.
    A nicely engineered solution given the material constraints πŸ‘πŸ‘.
    I'm sure Mike Turpin will approve too 😁
    I'd like to see a picture of the 'Spaghetti Junction' when it's all plumbed in πŸ€“.
    Rob.
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    πŸ’¬ Re: HARTLEY FLARELINE JET, MOTOR/ESC COOLING MODS
    5 months ago by Graham93 ( Commodore)
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    JB,

    Nice practical solution to solve the problem. That’s my sort of engineering, finding a way to make what you need within the constraints of the tools and materials available. Hope it works 🀞
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    πŸ“ HARTLEY FLARELINE, NEW MOTOR TEST.
    5 months ago by jbkiwi ( Fleet Admiral)
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    Received the new motor today for a power upgrade, and had to give it a try. It's a 3000kv 46mm Diam finned in-runner, as used in cars, rock climbers etc. It runs very smoothly and is very powerful and tourquey once the revs get up. A bit hesitant to start due to low torque at low revs but once it kicks in you can throttle it back a bit to a fast idle which is enough for 'cruise mode' to preserve the battery a bit.

    Not as nice at low revs as the high powered brushed motor (for chugging around) but should improve the top speed by a good amount. I'm just using a cheap aircraft 60A ESC (fwd only) to test it and this got quite hot after a good full throttle 60 second run in the tank, so may need to go bigger (I have the same one in 80 A) or water or fan cool it. Motor is rated for 40A but I will try to limit the throttle on the TX. Possibly need a 2000KV by the looks of it, (this being a smidgen hot and the brushed being a bit tame. I have a cheap high voltage (18v) brushed ESC coming, to try to boost the brushed motor (capable of running to 24v) as another experiment, as it is presently only running on 3s as dictated by the present ESC.

    Motor got to about 55/60 C after the run, but I clipped on the dummy motor/heatsink/twin fan unit, and it came on almost straight away with the 30C thermo switch I had previously fitted. Fans ran for about 3-4 mins and switched off at 28C (which was the room temp anyhow), so at least something works spot on. Should keep the temp down for general cruising around.

    The motor has so much power it spat the reinforced silicone tube coupling off (worked well on the brushed motor) so I made a closer fitting one, but it tried spitting that off as well. It has run forward and rubs on the front of the motor now, but is still hanging in there this time. Biggest problem is the huge variety of sizes on supposedly 3.17mm motor shafts and couplings (and all other sizes).

    Seems the Chinese haven't heard of reamers? (maybe their machines are just worn from making millions of fittings) Pretty much impossible to get a high speed shaft running smoothly as there is far too much play everywhere. Even the expensive one I just bought for the TFL jet units fits nothing exactly, and even though it's a 3pc rubber cross type, it's still no good if it's not balanced. Why they insist on making motors and couplings with these odd sized shafts and holes is beyond me, - but it's not just boats, it's everything with planes as well which can be extremely dangerous, if say, a prop comes off (most of their prop adapters are mostly rubbish,- the collet type being the best). If you make an accurate 4mm shaft for eg, and ream the adapter to 4mm, it can be made to fit exactly (maybe with a bit of polishing) perhaps they don't get this, or worse,-don't care.

    You hear many boats on YT screaming their heads off due to unbalanced shafts, which will ruin the motor and drive bearings in no time. The aluminium coil connectors are only good for one direction (with the coil direction not against it,- they can be cut left or right hand) The correct direction will tighten the coil, whereas the wrong direction will unwind the coil, distorting it and unbalancing it, (the one I got with the jet unit was LH which was wrong for the prop fitted,- not to mention the rubbish fit.) If I wanted to use it, I would have to fit the opposite hand prop and run the motor backwards. The quest for the perfect coupling goes onπŸ˜€
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