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>> Home > Tags > batteries

battery life
battery mount
battery pack
battery power
battery voltage
12 volt motors to esc,s by sonar Admiral   Posted: 4 days ago
simple now 2 x motors 2 x esc,s 2 x 12 volt batteries. Sorted....

Brushless in or out by canabus Sub-Lieutenant   Posted: 4 days ago
Hi Sonar I have used both in boats and with no watercooling. No problems with both types. The in runners are good for replacing brush motors as the 35mm brushless motor are the same bolt holes as the 540 brush motors. My first brushless was a Trackstar 17T 2400kv into an old rc car, 90watts to 550 watts, turn it into an insane rocket. The main brushless motors we use in the boating club are Hobbyking 3639 750 and 1100kv, 3648 1450kv and the outrunner D3548 1100kv with a 2 blade 40-50mm props. ESC's are the car 60 and 100 amp which handle 2S to 4S Lipo batteries.

Wiring in a rx, an ESC and a battery (pack) by Haverlock Admiral   Posted: 7 days ago
first take a deep breath and calm down its not rocket science. Question does your ESC have a battery eliminator ? if so take away the dry batteries to use in something else. Now your nicads connect to the POWER side of the esc. make sure you have the correct polarity. The servo plug from the ESC plugs into your receiver whichever is your throttle channel. If you have a modern set then you can put it on the wrong way round with no worries since positive is the centre post. The output of the ESC connect to your motor. If its a brushed motor no need to worry about polarity for now. With your ESC there should be some setup instructions if there are none ...... Usually its connect and switch on receiver then switch transmitter on with throttle full listen for beeps then go to low throttle. Switch receiver off. When you switch on in future make sure transmitter is switched on FIRST ok having gotten this far it only remains to check the direction of rotation of the motor. Take off the prop ( saves fingers) and put a piece of masking tale around end of prop shaft. Switch on transmitter switch on receiver and try the throttle. If the motor spins in correct direction fine if not Brushed motor swap the motor leads over Brushless motor swap any 2 of the 3 motor leads over. Job done have a cuppa then decide to sort out the rudder.

3 Footer on a very rare outing by robbob Fleet Admiral!   Posted: 9 days ago
In response to Paul's question, the weight of my 46" crash tender is 6Kg without the main batteries and 7.2kg with. It got wet for the first time today with brief dunk in the 'test tank', and it sits about 10mm above the waterline all round 👍👍. I ran the motor up very cautiously while my son in-law held it tight, and the thrust even at about a quarter throttle is astonishing 😱. I didn't dare run it up to full throttle or it would easily empty the bath 😁. I just need somewhere to find somewhere to run it now, and the courage to 'give it some stick' to get it up on a plane (hopefully) 😉.

3 Footer on a very rare outing by pmdevlin Fleet Admiral!   Posted: 9 days ago
They where planning boats Martin, capable of 30 knots, look at this, the front quarter of the boat is out of the water This model was originally built in 1962 and over time has gone through a coupe of refurbs, I made it way too heavy and it sits too low in the water. The brushless motor is too big, hence thinking of just swopping it with a smaller motor as it doesn't need to go as fast as I originally wanted a few years ago. Its never handled very well, the spray rails are now worn and pretty ineffective. At slow speeds the weight displacement is all wrong, and its bow heavy, almost ploughing the water, and it takes too much speed to get on the plane, I think she needs a diet, new spray rails, and a rethink on the battery placement. Unfortunately its a boat that very rarely sees the light of day, It would be interesting to know what other peoples boats weigh, without batteries, if anyone knows? thanks

The Taycol Target Renovation by Westquay Captain   Posted: 13 days ago
I have a couple of old Avos that were my Dad's, both in nice leather cases, but what to do with them? The batteries are no longer available! M

Brushless motor and ESC by sonar Admiral   Posted: 14 days ago
Still looking for recommendations For a fast marine Brushless motor and esc. Also now noted Required batteries...

Miss Geico 29" by BOATSHED Commander   Posted: 15 days ago
This is the 29" Brushless Miss Geico. Running on two 14.8 volt 5000mAh LiPo batteries. In Herbert Woods Boatyard in Potter Heigham Norfolk. She is pretty quick but do not know her top speed. Turns flat out on full rudder lock. Runs for about 15 to 20 minutes. Would recommend as a great fun boat.

Tamco Tx/Rx by RNinMunich Fleet Admiral!   Posted: 15 days ago
Aha! 3pole 380s. 6A at Max efficiency, no figure for max drain at 7.2V I'm afraid. So at least 12A when both running flat out. ESC (20A) should cope with that, but now it's damaged 😭 By the way; if you do use an ESC with a BEC and you still want to use a sep. RX battery, to conserve the drive batteries, then you need to remove the RED lead from the ESC plug at the RX. Lift the little plastic tab over the connector and you can pull it out. Fold it back along the cable and insulate it. 😎

Bluebird K7 by Midlife306 Commander   Posted: 16 days ago
Hot wire foam cutter: I started off by watching just about every video on YouTube on the subject. I then bought a few meters of 0.25mm NiChrome wire. At first I thought I'd just need a vertical bench top cutter. An unwanted shelf was liberated from a kitchen unit to use as the base, a couple of 2x1's were screwed underneath to give clearance for the wire connection. A piece of MDF was used for the upper arm. To give some adjustment underneath a block of wood with a screw in one end for the wire to wrap around was screwed to the base in just one position so the block could pivot. I drilled a clearance hole in the end of the upper arm for a long bolt & put a small slot in the end of the bolt to wrap the wire around, a washer and spring were used to give the wire some tension. When the wire heats up it expands so you need something to maintain the tension. Wrap the NiChrome wire on the screw underneath, put it through a hole cunningly placed in line in the base & up to the slot in the bolt in the upper arm, compressing the spring at the same time. Now that's all sorted get 2 pieces of normal wire, attach one to the screw underneath & one to the bolt on top. This is the bit where I found conflicting information on YouTube, people used all sorts of different things to power their cutters, batteries, pc power supplies & resistors, model railway power supplies, laptop chargers etc etc, everyone recommend different voltages & amperages. Luckily my Lipo charger can be sued as a power supply so I started messing with volt/amp settings, I didn't want the wire to glow red as that's too hot, I ended up using 10 volts & 2 amps, it works a treat. Unfortunately this cutter does have its limitations, throat depth etc. I decided I needed a hand held cutter, going off what I'd learned from the bench cutter this was a doddle. 2 pieces of 7mm steel bar 300mm long, 2mm hole in each end. 1 piece of 30mm square pine for the handle, 8mm hole through each end. Smack bars through holes in handle, get 2 pieces of normal wire, attach one to each hole at handle end, I just twisted them on & taped everything over. Now here's the trick with the other end, when you attach the NiChrome wire make sure you squeeze the bars together a little to give the tension, attach the other ends of the wires to the power supply & away you go. Like any tool I guess you get better with practice, lol Cheers Wayne

Tamco Tx/Rx by NickW Sub-Lieutenant   Posted: 16 days ago
Well i've put the old Rx back on, re-connected the leads and nothing, so something probably has blown.....ok so i'll have to buy a new ESC, i'm waiting for a new handset to arrive. The pics below show the Hitec original Rx and the one that comes with the Tamco....also shown the ESC.....all the AA batteries have been replaced and the battery pack in the boat recharged....lets hope replacing all new items might just get it working.

glass cloth or tissue? by Westquay Captain   Posted: 19 days ago
Took me a while to work out what a GirlFriend minehunter was! I used to have zinc sacrificial anodes on my steel narrowboat. We noticed whe we had our wooden historic boat out that many steel boats were losing their zinc in as little as two years. Yet my old boat had them fitted new when I had it out for a blacking as it had NEVER had any and hadn't suffered at all! Free running, cheap Mabuchis, Cycle battery, Oh those were the days indeed, aber veiieicht so!! My wee Sea Urchin still has it's 58 year old Kako and original shaft and tin prop. I just can't find any flat bell batteries any more! Martin

And now it is ESC time by RNinMunich Fleet Admiral!   Posted: 20 days ago
Saves on motors, batteries and chargers as well, so now you can afford a decent sail winch! Nicht wahr 😉

Clay Removal by sandkb Admiral   Posted: 21 days ago
Looking very good Rod. I can't wait to start racing them up the river. Think I might power mine with a DLE petrol engine though rather than an electric. No worries about batteries going flat then. I think we should paint each of the 3 a different colour though because in close combat we may not know which craft we are actually controlling ! Like what can happen with our RC model aircraft ! lol

3 Footer on a very rare outing by pmdevlin Fleet Admiral!   Posted: 22 days ago
must be first time in a few years, its running too heavy, time to lose weight, and reposition the batteries, I had forgotten how much water this moves😱 I have also decided to go back to brushed, it doesn't need the speed this can do, it gets too high on the plane