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chrisbrown
Recruit
1 / 4
Sea Queen
1959 kit built, restored two years ago,removed the ganette 15cc 4 stroke and replaced it with a bruhless motor which is a EMP 5065 410kv with a 100amp ESC and 4cell 5000 lipo turning a x70 two bladed prop, runs times up to 20 minutes, and a very good but over scale speed, will take a video of her next time a I take her out.
Liked by jacko and circle43nautical and
4 comments
  • chrisbrownRecruit
    Hi, I sold it on e bay, £748.00. what a resolt.
  • chiffsPetty Officer 2nd Class
    nice one
ianed57
Sub-Lieutenant
Lesro Rapier
Second decent run with this boat- rather sedate I think. At the moment it's drawing 33amps (stationary, 16.5 amps each motor) with both motors running from a 12v Nimh pack. I want to get each motor running off a separate LiPo and then I could probably increase the prop size- still well within the esc rating and the motors are very cool after a run at the moment. it seems a bit back heavy and I'd like to get it running flatter- so will try moving the batteries more amidships.
2 comments
  • Dave MVice Admiral
    HI Ian
    See you are making good use of the wattmeter 😀
    Like the video and agree the balance could benefit with a bit more weight amidships.
    Listening to the video sound suggests your motors are not developing full power so I suspect the NiMh's are not capable of delivering the amps required.
    You could try smaller props with the NiMh's to see if the performance Improves, could be your motors are working just below the optimum.
  • ianed57Sub-Lieutenant
    Dave, I found that the Nimh batteries were dropping off to around 9v at full power when measured with the wattmeter and this is why I want to go for Lipos, one on each motor. At the moment I'm taking everything from one pack and I think this is the limiting factor.
    When I get my Lipos I will stick them in the middle and try larger props, probably 40mmS types to begin with, having measured what's going on with the wattmeter first. it may be that the existing props will do better if the batteries are delivering up what the motors want. You're right, there is still plenty of headroom with this setup.
    Just got to rake up the cash for two largish capacity Lipos!

    The wattmeter is a splendid purchase- I'd say essential for this type of thing.

    Anyway, glad you liked the video- she still looks quite good toodling around at that speed.

    All the best...Ian
Gregg
Sub-Lieutenant
F1 Tunnel - Hobby King
First trial run after purchase off good old Ebay. Running 26kv motor and 11.1v lipo. its a little bit "skippy", but after returning to shore, it looks like it may simply be the height of the prop shaft, so now adjusted, ready for a second trial shortly....more to follow.
5 comments
  • Dave MVice Admiral
    Looks exciting. Are Tunnel boats more stable than other types?
  • GreggSub-Lieutenant
    They can be very stable and get a higher level of speed over a mono hull. BUT ...... yep, there always has to be one............ I find that a mono hull can sail in any type of water condition, twin hulls, or tunnel hulls are better suited for calmer water. the main risk is for the hull to flip over backwards if thits the crest of a wave and the wind gets under the bows, the centre section then acts as a sail , wind catches it and lifts the hull nose up........... and over !

    If you get the chance to sail one.......try it, they are good fun to sail, take a bit of concentration to get the best speed out of them, especially on turns.

    Its like any boat, there are good things and bad in all of them to a degree.
sharpy1071
Chief Petty Officer 2nd Class
1 / 2
veron fast patrol boat
Built from a Veron plan, had to do the lofting myself!! Got two brushed motors in it at the moment, hope to maiden it tomorrow(2/9/12). Hash up of the Trinidad and Tobago boats. Not real scale but enjoyed making it.
6 comments
  • ianed57Sub-Lieutenant
    Brian,
    Ouch! Sounds a bit expensive.On the advice of Dave M on this forum I bought myself a wattmeter and it certainly takes the guesswork out. I went through three esc's on my Lesro Sportsman before I got it right- hopefully! Also spent a good deal of time anxiously waiting for my Rapier to drift back to shore after it popped a fuse- twice. Now I know what the limits are and I just didn't have a big enough fuse in.

    I'm having just what you describe with batteries being too far astern- I'm going out Monday to try them in the middle of the boat. Also hoping to get some LiPos when I have decided on a make.

    Hope the new motors and fans work out and that you get some good shots on the water eventually.

    All the best...Ian
  • sharpy1071Chief Petty Officer 2nd Class
    HI Ian, well the original motors came from a discount store, £2.00 each from memory, they work Ok in my USS Crokett, but I have no glazing and the hot air can escape! I think the sequence went like got hot, melted fan, fan fell off, jammed Motor, fuse blew. I couldn't get any water cooling pre bent from Westbourne so will make my own tomorrow. I have opened up the funnel a bit more on the side and place louvres over the hole, I will get a photo. I did use LIPOs (turnigy 3cell 3500) but now have gone over to A123's much better I have 3 in series X 3 in parellel Giving 6600 MAmps @ 10.4volts.These are very safe batteries, almost unbreakable, I use them in my planes they weigh a little more than LIPOs but a lot less than Gel cells about a quarter and can be forces charged but you would have to sail all day to flatten them. Thanks for your interest, speak to you soon, Brian
ianed57
Sub-Lieutenant
1 / 3
Lesro Rapier
A Lesro Rapier built from a new kit undertaking its maiden voyage. Two 700 9.6v motors with two Mtroniks 40 amp esc's run on 12v with two 37.5mm props. The performance was somewhat disappointing. When the photo was taken I had a 14.4v pack in, forgetting the 12v limit on the esc's -but I got away with it!
28 comments
  • GreggSub-Lieutenant
    I would try and leave the cooling slots fully open, to allow air to circulate through the motor internals. Same goes for any air slots in the front face of the motor, always try and make a hole on the motor mount [if none in], to aid airflow through the motor.
    if you cover the slots up, you are only adding to the internal temperature of the motor you are trying to cool.
  • ianed57Sub-Lieutenant
    Thanks. I suppose it's obvious when you think about it. The motor mounts do have slots in the front face.
Gregg
Sub-Lieutenant
Cen Aqua.
First trials after upgrading the hull to brushless motor, instead of original 550 size motor. this test was on a 2 cell 7.4v lipo, I did try a 3 cell, but the stretch of water we use isn't long enough, I run out of water too quickly, so for now, 2 cells power it is. its still a handfull on turns, as the turn fins will take some setting up to get the best out of them to maintain a degree of speed, rather than drag factor off the turn fins.
3 comments
  • HuntsmanmanAble Seaman
    Mmmm.... turn fins? Perhaps he means a 'dagger plate' a vertical fin that should help prevent the boat from rolling and filpping on turns. Just theorizing I'm not sure though if two would be the answer, I wonder if they might actually hinder. With a single plate of the right size placed centrally the boat would be still be restrained from too much sideways roll yet not lose any directional control being able to pivot on the single plate, where as two plates would tend to act like two fixed rudders and be hinder to turning. I also fly planes and I agree with Dave M about fine control, if using a computerized radio dialing in both rates and expotential helps compensate for over enthusiastic waggling of the sticks and is nearly always required for fast craft particularly first time out. Anyway that sure looks like fun, that's a serious handful and on just 7 volts, well done!
  • GreggSub-Lieutenant
    Dagger boards are onl;y used on sail boats, turn fins are a fine edges plate, fitted to the transom, and adjustable in height/depth to the water, so it gives less "bite" when running straight, but digs in on turns to get the hull to bite in to the water.

    A rudder is fitted, so there is no way of fitting one of these centrally my freind, they have to fit either side/one side of the transom.
    "trimming the radio" does not cater for the movement on a fast boat, thats purely down to the person behind the sticks at the time!
    The "end game" on the video was when the rudder dug in too deeply and the boat just spun around due to an "over steer" moment........... thast just what can happen when playing around setting up brushless systems.
THECAPT2012
Leading Seaman
ALMUAZZAR
Almuazzar is type 42 destroyer built by Vosper. The model is powered by two smiths motors and a 50 amp scooter battery, she is 83 inc long 15 inc beam.
Liked by circle43nautical
7 comments
Gregg
Sub-Lieutenant
Kyosho Wave Master
Purchased secondhand, upgraded to a proper motor esc rather than the original/factory on/off micro switch for the motor power. Running a graupner 600 race motor and 7.4 lipo, basically just to run the brushes in on the motor before raising the battery voltage,
bit of a shaky video but try holding the transmitter and filming at same time on your own [ha ha].
it does have the capacity to move a ot faster, but would sooner work the motor in fully first
frankburgess
Master Seaman
old motor
this is another photo of the motor taken showing the drive side fitted with a metal fan
Liked by circle43nautical
6 comments
  • frankburgessMaster Seaman
    Thanks Dave
  • frankburgessMaster Seaman
    The Fireboat had it first run yesterday with the donated Johnson 888 motor and the original prop. Speed was satisfactory, just nicely on the plane and the battery lasted well, a 7.2V Nimh 3000, so I am happy with that. Controller was a donated Robbe minI 200. Unfortunately although this gave speed/stop control there was no reverse. it has pot adj for 'speed' and 'stop', which I adjusted, but Perhaps it was never designed to give reverse?

    Another project is a very old 1950 damaged 'ASL'hull. I have the original drawing titled 'British Power Boat' who were the builders in wartime. it has a 'whaleback' cabin surmounted by 2 machine guns in turrets. These I have cut from radio valves.
    Its a most unusual looking boat.
frankburgess
Master Seaman
1 / 2
no 94
HI everybody

Another ebay purchase, a Fire Tender which I think is from the 50's. it is fitted with a very unusual old motor with sprung loaded brushes, capacitors, and a fan.... seems to run happily on 12v, which I plan to reinstall. Does anybody recognise it? it was fitted with a 'spring' universal joint. I am fitting a conventional UJ. There is also a circular switch attached to the motor. This appears to be wired to switch in up to 3 battery supplies! but I think I will fit a modern controller with modern nicads.

I sail at the Maldon and Blackwater Model Boat Club at Heybridge.
Regards Frank Burgess
Liked by circle43nautical
9 comments
  • frankburgessMaster Seaman
    HI

    Yes it is...I scratch built it using a GRP 'workboat' hull as a base. I used a simple drawing from the 'Jolie Brise' book blown up to size. I altered the bow, stern and the keel to match the drawing. The rig is slightly undersize and simple the keel is deeper, the deck layout is very approximate taken from photos but simplified to make it more robust for sailing. it has a winch for sail control and the rudder is controlled from the tiller via lines and blocks to a servo under the cabin top.

    As you probably know the boat was bought as a Le Havre Pilot boat by EG Martin who then instigated the Fasnet Race, which Jolie Brise won 3 times.

    Thanks for recognising it.....best regards Frank
  • chiffsPetty Officer 2nd Class
    HI Frank I have built model of jolie brise from plans I got from France made few years ago as static model, I have made uo a false keel that I can fit as and when I get round to making sails, have provision for steering via chords running thro the deck in tubes to the steering servo, as yet no thought as to how to install sail winch as have only small openings where hatches fit. you are right about her being pilot cutter and winning fastnet 3 times, she was however built by Monsieur Paumelle in 1913, I hope at some time to get her on the water.
    Regards Chiffs
wullie
Able Seaman
S80 Schnellboot
This is my 1/24th scale S80 Schnellboot,it has a Metcalfe GRP hull,the superstructure is a mix of 3mm/4mm ply and 2mm plasticard,it has 3 x Graupner 600FG motors that have a 3.1 ratio gearboxes fitted,the props are 55mm witches hat type,and it has 3 x Electronize 30amp speed cont,it has a really good scale speed running on 2 motors but nearly jumps out of the water when all 3 are engaged,It was scratch built from plans,but not by me,I got it in plain grey,I did the paint job and added the crew,I sail her on a pond near to my home in Edzell,
2 comments
  • bilboRecruit
    That's not the one that got pooped on is it Wullie ?
  • wullieAble Seaman
    yup thats the one,little sh*ts,...but they've been locked out now,and their not getting back in

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