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>> Home > Tags > esc

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Twin Esc/Mixer by jarvo Fleet Admiral!   Posted: 10 hours ago
The basic answer is yes, but, ..... lay esc/mixer on its side, then lay the battery pack along side, just so you don't block the cooling holes in the esc. Mark

Twin Esc/Mixer by NPJ Captain   Posted: 14 hours ago
Your advice please.................... Would it be OK to position the Receiver Battery on top of the Esc/Mixer box? As you can see I have cut the holes as required for the Unit! All the best. NPJ

huntsman 46 by canabus Admiral   Posted: 1 day ago
Hi Pilot I have the Precedent Huntsman 34" hull with the 3648-1450kv, 100 Amp car ESC, 2 blade 40mm 1.4 pitch CNC prop and at present only running on a 3S 5800mah Lipo. I am still working on the cabin and that windscreen. Installed the front, rear, toilet and kitchen windows and frames today. The boat is very quick in the 35-40KPHour mark, so it's not slow. Canabus

huntsman 46 by canabus Admiral   Posted: 1 day ago
Hi Pilot If you are using 540 can size (35-36mm brushless motor) a 3639-1100kv 800watts, 3648-1450 1600watts or a XK 3674-1900 1769 watts. All run on 100Amp ESCs, but check the maximum voltage they handle. I use car ESCs with the electric fan on top because they run cooler at slow speeds and no water plumbing required. The same with the motors no cooling. Props for these motors 37mm 2 blade or 40-45 mm 2 blade. If you go for a larger motor for a larger prop, a L5055-700kv 1600watts same ESC, but, start with a 2 blade prop about 52mm. Battery a 3-6S 5800mah or more with a C rating of 40 plus. I have used the 35mm motors in 34 to 40" boats, but, for my 46" Vosper Crash Tender I am going to the 5055. To large a prop will cause over heating of the ESC, battery and Motor. A in line amp meter(Hobbyking 9598000004-0) is the one in use. It reads the maximum amps, so for run speed amps slow speed up to maximum as a hit the throttle hard will give you maximum amps. Canabus

huntsman 46 by jarvo Fleet Admiral!   Posted: 1 day ago
Hi Pilot, first of all welcome to the forum. Do you have any modeling experience?? Which kit or plan are you using??? I would recommend an outrunner look for one with about 700 - 800 watt output, 3s or 4s rated with an ESC rated at least 100 - 150 amps, as a start with a 40 - 45mm brass prop. Kit or plan, reduce the angle of the propshaft to about 15 - 20 degrees electric motors can lie lower in the hull which was designed for I/C motors with their flywheel hanging below the motor, needing extra clearance. Suppliers. Have a look at the hobbyking site, for motor and esc, once you have the basic build underway, decide on the batteries you are going to use. Hope this helps as a starter, look round the web sites get more info and we can direct you further as to your requirements Regards Mark

46" Firefloat What Motor/Battery by jarvo Fleet Admiral!   Posted: 2 days ago
Hi JJ. Just a word of warning, your Mtronics esc will not work with brushless motors, also 20amps is close to its limit with twin motors and fairly large props, performance wise, brushless is the way to go, but will need 2 esc's, wont run with one, if your dropping hints to the elves, spec your motors at about 700 watts and 600-700kva great torque with good revs at 7.2v even better at 12v Mark

46" Firefloat What Motor/Battery by moormedic Seaman   Posted: 3 days ago
Thanks again Will give that a try first and then perhaps see if Santa brings me some brushless motors 😁 Cheers J.J PS At the moment using a single ESC( 20A Mtronics) but would probably go for two if I move to brushless.

wardrobe by philpjuk Sub-Lieutenant   Posted: 3 days ago
yes still clockwork,The best improvements have been made by lightening the motor, drilling holes in everything and replacing a side plate with one made of alloy.It is just a nut on the sponson, they are adjustable for incidence.It will now plane on the sponsons "unsticking" the hull.The original was built when I was 13/14,the motor came from the family gramophone when my dad converted it to autochanger/amplifier,the wood came from the woodshed but I was short of plywood and realised the back of my wardrobe was plywood and was hidden behind clothes so when my parents were out I cut the bits I needed from it!,my mates christened it "the wardrobe".Performance is down to propeller choice and is a compromise between speed and runtime.I took it to a boating pond in a nearby town when my wife needed to visit it and a council "jobsworth" told me I was not allowed to sail it,"only yachts and electric boats on here sir"no amount of reasoning would make him change his mind and he escorted me out of the park!.

46" Firefloat What Motor/Battery by jarvo Fleet Admiral!   Posted: 4 days ago
Hi J. Your motors are nominal voltage 7.2v. Try a single 7.2v 3300 NimH pack, quality from Component Shop. It will be short running time, powering 2 motors but will give you an idea of performance, then you could buy a second, 1 for each motor, if this did not work out or you want more performance then go for brushless motors, still with the 2 battery packs. I would try the single pack first, suck it and see, develop it from there without breaking the bank!!!! Cant see any ESC, have you got 1 or 2? if 1 use a 'Y' lead to connect the second battery. Mark

46" Firefloat What Motor/Battery by moormedic Seaman   Posted: 4 days ago
Thanks Jarvo for the additional info...I did Google the safety bag afterwards actually. But...given what you've both advised.......as a stepwise approach, rather than discard x2motors plus ESCs plus batteries all at once, do you think perhaps upgrade the batteries first (more power less weight) and re-assess ? Then , if still not satisfactory, change the motors and Escs ? J

46" Firefloat What Motor/Battery by jarvo Fleet Admiral!   Posted: 4 days ago
HI JJ. Your question about a safety bag, Damaged / overcharged lipo's can catch fire, think of the Boeing scandal that grounded the fleet last year. Charging in a safety bag is advised the bag is fire retardant material, which will contain any problem. Your remarks about the boat not coming onto the plane is down to the weight of the battery, my fireboat started with 7.2v NimH packs 1 for each motor, Graupner 700bb's, good cruise but not quick, but short run time, 10mins. I have re-wired to allow 3s lipo's, but not had chance to test it yet, but should go like stink. With a fast hull, weight is important, 4 x lipo packs, 1kg, half the weight and possibly 6 times the power delivery. In your first post you mention 600 motors on 6volts, they are probably rated at 8.4volts, same as my 700's hence the lack of performance, also the battery, at 12ah it should last about 30mins, was it fully charged??? and is it showing at least 6volts, ie not got a duff cell??? Canabus, in his post described an ideal set up with brushless motors, 1600 watts is just over 2 hp, 750 per horsepower so you can see the difference in performance with different motors and battery set up's

46" Firefloat What Motor/Battery by canabus Admiral   Posted: 4 days ago
Hi What type of props are you using(size and number of blades). I see your basic problem is under powered motors and a very heavy battery. I made the big switch over three years ago from brush to brushless motors and to Lipo batteries. With the help on the forum and club members it was a learning curve, but, I would not go back. A 5800mah Lipo battery is in the weight of 450 to 570 grams and would give you a good 1/2 hour run time. A good balance charger and safety bag are the main requirements, also maximum charging for the 5800mah battery is 5.8 Amps(same as the old Nicads). Also a low voltage battery alarm. Your 600 motors can draw up to12Amps !!! Replacement same size motors for your mounts would be 35mm brushless motors, but, you will require two ESCs with a Y connector to run on the same throttle channel. Replacement brushless motors are far more powerful e.g. a Hobbyking 3639-1100kv with a 60Amp ESC on a 4S 5800mah Lipo Battery is 800watts and with two in your boat is 1600 watts!!! Your old motor would in the 100 watt each mark !! I have the same size crash tender, but, with a single brushless motor. I have all the order numbers for the motors etc. and a setup the ESCs if your require. Canabus

Predator (Aeromarine Laminates USA) by bilzin Sub-Lieutenant   Posted: 4 days ago
Aeromarine Laminates Predator 21 hull with HK 2630kv brushless outboard and Turnigy 120a w/c esc. Waterproof metal geared Servo and will have 4-6s lipo when completed.

Voltage step down by Dave M Fleet Admiral!   Posted: 6 days ago
Why not use the 12v battery if the ESC is Ok for 12v. Restrict the tx stick movement so that just 6v goes to the motor

Electronics Down Below (5) by RNinMunich Fleet Admiral!   Posted: 6 days ago
Hi Neil, You read too much!! 😉 Before you give yourself the work of altering the rudders see how she performs with the twin ESC & rudder mixer. For slow manoeuvring, especially in reverse, I'm pretty sure the rudders will be almost irrelevant, apart of course for controlling the mixer and hence motors. If you use the P94 in Mode 3 you can spin the boat on it's axis😉 The guys with small rudders in front of the props most likely don't have twin ESCs and a mixer. Two maxims: Why complicated when simple works! If it ain't broke don't fix it! I intend to 'suck it and see' first. Whatever you do have fun with it, but don't 'over engineer', cheers Doug 😎