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>> Home > Tags > batteries

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advise required by teejay Lieutenant   Posted: 16 hours ago
Hi all and thanks to Ron and Doug I have not forgotten about the TGY-i6 set and have looked at the suggestions from Ron. I looked at a lot of stuff it can be a bit of mine field, I have fond this at Cornwall models Servo, Batteries, Charger & 15A ESC This pack provides the radio control unit and all items necessary to complete an RC boat kit. Certain models may need a motor Contents: 2-Channel transmitter Reflex Pro 3.1 2.4GHZ 5-Channel receiver, CS-3 steering servo (3kg/cm force) Transmitter batteries, 7.2v/2100mAh drive battery 15Amp Marine Electronic Speed Controller Plug charger Multi-lingual instructions Part No: CMBRCP15 I think this may be the way for me to go as it seem to have all the things I need to learn about in the one package, I know I may have to up grade some parts but for the first timer I think it would do your opinions would be much appreciated

advise required by teejay Lieutenant   Posted: 1 day ago
Hi all and thanks to Ron and Doug I have not forgotten about the TGY-i6 set and have looked at the suggestions from Ron. I looked at a lot of stuff it can be a bit of mine field, I have fond this at Cornwall models Servo, Batteries, Charger & 15A ESC This pack provides the radio control unit and all items necessary to complete an RC boat kit. Certain models may need a motor Contents: 2-Channel transmitter Reflex Pro 3.1 2.4GHZ 5-Channel receiver, CS-3 steering servo (3kg/cm force) Transmitter batteries, 7.2v/2100mAh drive battery 15Amp Marine Electronic Speed Controller Plug charger Multi-lingual instructions Part No: CMBRCP15 I think this may be the way for me to go as it seem to have all the things I need to learn about in the one package, I know I may have to up grade some parts but for the first timer I think it would do your opinions would be much appreciated

Duke of Cornwall by Neil-S Seaman   Posted: 3 days ago
[Score: 8/10] 51"/7000g Duke of Cornwall Capable of 4mph and a runtime of 30mins Twin Propellors (3 Blade 20mm) Direct Drive to a Torpedo x 2 (3 Blade) Powered by Lead Acid (12v) 6Amp/h Batteries Controlled Through Electrinize (5Amps) ESC - Comments: This was a static scratch built model constructed by a model engineer probably in 1970s, I was gifted the boat by the local RNLI Branch with the proviso I looked after it and occasionally displayed it on Flag Days. The boat is a model of the Lizard and Cadgwith lifeboat 'Duke of Cornwall' which saw service for 20 years and saved 95 lives. I have fitted 6 channel San,wa remote control and the Torpedo engines and batteries. She runs very well on the water and achieves a good scale speed when both motors are at full power. Batteries are 12 volt gel type and new, I have never had a problem with endurance. Control is by two Electronize speed controllers which plug in independently to receiver. She has a two tone siren, worked from retract servo switch, which is useful for clearing a way through birds. Steering (like the real thing) was rather sluggish, a single blade rudder but it improves by using the two engines. She is pretty heavy to lift into the car, I use nylon strops to lower her into water. I have done several adjustments to her topside so that she more correctly resembles the 1962 Barnett lifeboat she is modelled on, main adjustment was to put mahogany veneer onto to forward and rear bulwarks, as the originals had. The original boat topside was painted grey and it was only later that areas were painted orange, she is a non self righting lifeboat one of the last of this type and modifications were made in the mid sixties to seal off the rear doors and provide a watertight compartment, as well as fully enclosing the wheelhouse (the model's wheelhouse is open at the rear, as was the original. All hatches and doors open. The railings are chain link and seem to be a very good match to the ones fitted. My only issue at the moment is the radio wires which seem to be very vulnerable, have used electric thread but not a great solution - something to look out for. I have purchased 3 crew and am about to paint them, two will be in the wheelhouse.

H.M.S BRAVE BORDERER by RHBaker Fleet Admiral!   Posted: 3 days ago
Looks like everything is set for the first open water test. Sun is shining, ice has gone and water smooth. Intention is to start the open water test program with a repeat of the pool test, except this time with everything wired correctly; the load cell positioned so the “pull” is more horizontal and ballast available to hold the propellers underwater if necessary. Hope these improvements help reading stability. To modify the “pull” arrangements, wrapped a light cord around the propeller shaft struts and fed the loose end above the transom shelf and out over the stern. The load cell was hooked into this and then tied to a fixed grating on the pond side. Started by measuring the electrical requirements for each of the three motors and the propeller bollard pull, using the 2 S battery. Found the bollard pull was up slightly at almost 3 lbs per propeller. Probably because they were now held at a greater depth in the water. Also blew several 20A fuses, so fitted 30, which seem to work. A series of runs showed adequate performance with plenty of spray, although the bow did not lift much onto the plane. The forefoot did raise almost above the water surface. Then tried a 3S battery. Although this was much heavier, the performance improved dramatically. The bollard pull was up to almost 18 lbs per shaft. The bow still did not lift much to a plane, although the forefoot was almost clear of the water at full speed. The battery was located just back from the bow, so it is suspected that it held the bow down. The impact of the transom flap down angle could also hold the bow down, but have decided to leave as is for the time being and avoid the temptation of making too many adjustment at once. Whilst it is still too early to draw definite conclusions, it seems as if a 3S battery will be required. The model sustained some slight damage due to the test arrangements, so will repair that and also fit the 2 bladed Hi Speed propellers. Will then repeat the program and report. Should be able to draw some definite conclusions then on the best power train. Neither of the batteries used, neither the 2 S nor the 3S are ones I would choose for this model. As a result the capacities and weights are not ideal. That must also be remembered in future deliberations.

It's a sad day!. by Westquay Fleet Admiral!   Posted: 5 days ago
Considering you can't run a pressurised boiler without a Vulcan steam certificate, there is no justification for banning steam, like New Brighton has. Mind you, when I saw what a silly little puddle they'd been left after the new developments on that town's seafront (hotel and retail) I wondered why they bothered turning up at all, but on 2 occasions I watched while I was staying there to visit a friend with my wife, there were two old boys with tugs and one of those had forgotten his batteries! Otherwise a Dad with a small boy and his off the shelf speedboat and even that was scowled at by the old farts. If a boat has a Mamod type of boiler it's not even considered a pressure vessel as its capacity is too low as is its "pressure", so you're covered all round. No need to ban anything as usual. Many parks have live steam railways and if they went bang they'd get their windows blown out in the town hall! Martin

Dremel Battery Pack! by RNinMunich Fleet Admiral!   Posted: 5 days ago
Here in Old Munich as well, washed out my Sea Scout trial planned for today😭 Looks like being and rainy and thundery week. Got everything packed in the rucksack ready to go if it brightens up; now let me see ... selection of drive batteries to test, in LiPo bag - check, Capacity / cell tester - check, TX and spare batts - check, Camcorder (batt fully charged) - check, Drying cloth - check, Basic tool set & Mini-multimeter- check, Bath towel if I have to swim again - 😡 Inflatable rescue kayak - !? Essential provisions (just a wee dram Officer) 😋 - check, Foam block boat stand - check, OH!! THE BOAT!! 😲 Might stick the PTB in the car as well, just to try it before I start on the reno and upgrade / conversion to PT109. In for a penny .....! Happy Dremelling Ed, mind yer fingers! Cheers Doug 😎

It's a sad day!. by Novagsi0 Captain   Posted: 6 days ago
Our "Imara" Tug has a cheddar steam plant, I might swap it for the motor and batteries it currently has. I can remember as a small child at a pool called the apex pool by Brean Sands. when a large power boat with a big KMB engine run up the bank out of the pool. The carpark was a gentle sloap straight into the water the boat passed me a 40 MPH on the tarmac. The prop I found, and had a small momento to remember the boat by. I actually still have the prop 35 years later and ran it on my power boat for a bit. Good times. (sorry for nicking the prop i was only 10!!) Stephen

It's a sad day!. by Westquay Fleet Admiral!   Posted: 7 days ago
Yep, built mine with my Dad, a 34" Crash Tender. We used the then new PVA glue and to be honest, 54 years later it still holds well and is waterproof. I really must finish it some day! I confess I never had an IC engine in a boat, but I've always had an ED Racer with water jacket and big brass flywheel. Still have it on my shelf with others, but I could never get the buggers to start! So Dad made sure the Crash Tender had a good electric motor when he spoiled me with it all for my 11th Christmas. I had REP single channel R/C and a Taycol Supermarine motor and Taycol coupling. That's what's in it and will stay in it. Alas the R/C gear was stolen. I could replicate the case, but there just ain't the time for all these things, so an old Mini Hex 1970s Propo set will go in it as a classic curio. I used it for years with the REP on the oyster ponds at Paglesham. Left, centre, right, centre, wiggle right, wiggle right and so on. The Taycol ate batteries! Martin

Radio in a yacht by Westquay Fleet Admiral!   Posted: 8 days ago
Right chaps, firstly many thanks for your suggestions. I won't be doing LiPos, because the charging is too complicated for me. I can't read the instructions of my fancy charger so it remains in its box. I forgot that I can get NiMhs in sealed packs, so that'll be something I get hold of, although the shop had more out of stock than in! Secretary, I liked the look of that servo you linked me to and will be getting one. Norman, I have today picked up my Spektrum DX5e from my daughter's place where it was in store. I found it whilst looking for something else as always! I already have the Orange Rx and can now try binding it, when I have some batteries for both items. I also have 27meg gear, three different lots and WILL be using it in my classic speedboat models. I waste as little as possible! I have now settled on a continuous loop for the sail control, which doesn't need spring tension, though haven't decided a good way to attach the sheets to the loop or how to tell when the loop has gone as far as it dare before getting a bit mixed up. But I have sorted out the plank system by making one section trap a second, both of which can be removed separately. I found a gear and shaft out of an old printer which I chucked in the lathe and turned a groove in for the loop line. Then I found a use finally for that 6mm ball race I've had in my drill drawer for years! It was an interference fit on the shaft. I had some PTFE plate for another task and in some spare I made a hole that the ball race pushes into a treat, below it an identical plate supports the other end of the shaft, PTFE being very low friction. All this levels the return "pulley" with the servo drum. I only have a limited length of run for the loop line, but it should be enough. It's all I got anyway. About 10" between pulley and drum centres. If I attach the sheet part way down the boom instead of the end I should have enough movement. So, progress. My son-in-law supplied some bike gear cable for the rudder actuation as the rudder stock is at an extreme, typically cutter, angle. A hunt through the supplies (Pringles tins) gave up enough aluminium tube to guide the cable. Alas, I installed with lots of epoxy the rudder tube and it turns out to be 4.5mm bore! Gawd knows where that came from. The tube built into the back of the rudder itself is 4 mm. So that'll be some lathe work ahead. All good fun between the gardening chores. Cheers, Martin

Radio in a yacht by stormin Sub-Lieutenant   Posted: 10 days ago
Not sure about the 6v in your winch Martin all I can say is one of my many many models (boats planes and cars) is a one meter racing class yacht, now I can't remember for the life of me which winch servo I fitted, it was 15 years ago. I do not race the yacht now just pootle about the lake and all I have ever used is four Duracell AA 4.8v batteries (other makes are available) in the boat serving the receiver the winch and rudder, the winch works fine, ok in strong winds if tacking X wind the sails may not draw in quickly but I normally wait until I'm turning and the boat is momentarily into wind before winching in (hope that makes sense). I'm sure the serious racing boys will be able to explain further. I can remember using a dedicated 4.8v battery serving my retract servo in a large scale aircraft many years ago but can't remember at the mo' how it was wired into the system. Norman.

LiPo batteries by RNinMunich Fleet Admiral!   Posted: 18 days ago
Evenin' Peter, hope you noted the % capacity before you left, be good to compare with the value in August. One more tip; store batteries cool. It slows down the internal chemistry which reduces the capacity. See attached tips from the fly-boys😉 Oh! And welcome home, cheers Doug 😎

Genesis 9000 by MouldBuilder Lieutenant   Posted: 18 days ago
I have brought the wiring home we with me. I will change the switch and take it back with me in August. I must admit that I thought the stern was a bit low in the water. To evenly distribute the weight, I put in two batteries as suggested. I will try to move the batteries forward to change the centre of gravity.😊

LiPo batteries by MouldBuilder Lieutenant   Posted: 19 days ago
Thanks Doug. I checked the percentage fill when I received them. They were 31% at 3.67 volts per cell. I am now at home so I cannot check them again until August.😱

LiPo batteries by RNinMunich Fleet Admiral!   Posted: 19 days ago
Hi Peter, check the capacity as well as the voltage. Around 20 to 40% is normal for storage and when they are delivered new. Cheers Doug 😎

LiPo batteries by MouldBuilder Lieutenant   Posted: 19 days ago
I have now left the batteries at a storage charge of 3.85 volts per cell. I will let you know where they stand when I return in August. The ammo boxes are a great idea. I bought two from ebay at £12 each. They are of super quality. I have transported one with the boat to my boating river in Hungary. The other is here. Thank for all the advice. It made things a lot easier than they could have been during my first uses of LiPo batteries. They are much easier to use now that I have some experience.😊