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>> Home > Tags > batteries

battery life
battery mount
battery pack
battery power
battery voltage
MISS GEICO POWER BOAT 29" by agoodboater Sub-Lieutenant   Posted: 1 day ago
for sale R C Miss Geico 29" brushless power boat twin hull complete set up with Spektrum DX2 radio control, inc 4 x 4000mah S2 lipo batteries very fast !! this is all brand new i bought this over a year ago and never used, so in near mint condition, change of circumstances forces sale at £275, cost me £430, so i am taking a big loss, but ha thats the hobby !!, ****cash on collection only **** TO VIEW 07903765943

Novice Build: Vintage Model Works 46" RAF Crash Tender by andyhynes Petty Officer   Posted: 7 days ago
I built mine a couple of years ago. The wood is good quality and the metal fittings dont take much cleaning up. My fireboat runs of a brushless motor running of lipos batteries and performs well. I used auto paints regards the finish. and very pleased with it. It performs a good as my 49" Perkasa which runs of two brushless motors with the lipos wired in series.

Sweet ❤️ ❤️❤️ Heart by Grandpa Sub-Lieutenant   Posted: 10 days ago
You have seen it being built. Now it is done. A Nor-Star Kingfisher kit but with some scratch building too. Because of the motor being longer than how the kit was originally designed, the second bulkhead was altered. I am running it with two 2400 Ni-MH 7.2 batteries, a Futoba servo, on a 2.4 GHz Spektrum.

Model Riva Sportsboat by JohnM Apprentice   Posted: 23 days ago
4ft model Riva Aquarama sports boat for sale, as featured in 'Model Boat' Sept. 2011. Mahogany build. Immaculate. Radio controlled. Twin electric motors. All batteries, controls etc. Hardly used due to bereavement. Based in Coventry UK. £300.

blowing the dust off the fireboat by pmdevlin Fleet Admiral!   Posted: 23 days ago
got it out of the box for the first time in two years! Boat was ok, after I remembered to use dual rates on the rudder, its been a while, but the batteries didn't do so well, you can hear the low voltage alarms going off and this was 1/2 throttle, need a bigger lake! v=0ZBC-0EqjuA

Bridge Build by Pav403 Commander   Posted: 24 days ago
Hello all, I've been busy with the Bridge build, this has proved a little tricky as the forward structure is at a slight angle when not on the ship. I've used a combination of 1/8 ply and 0.75mm plastic sheet. I needed the ply in this section as this will be where I will have hull access for batteries and needed the strength. The walls of the upper structure are plastic sheet which I think have come out well. There is still more to add (look out wings at the rear of the bridge need walls etc) I can the start to connect this to the decking before adding finer details. Coming on slowly is the hull, I will spend a bit more time here over the coming weeks to get it ready for sanding and then fibreglass coating. Good luck with your builds. Dave

Vosper Crash tender by bluestreak505 Chief Petty Officer   Posted: 30 days ago
[Score: 8/10] 37" Vosper Crash tender Capable of 8mph and a runtime of 40mins Twin Propellors (2 Blade S Type 40mm) Direct Drive to a 540 X 2 (2 Blade S Type) Powered by NiCad (7.2v) 3Amp/h Batteries Controlled Through mtronics 30amp x2 ESC - Comments: Built from a plastic hull, with light ply superstructure which is totally removable for access to batteries and motors.window frames cut from plastic self adhesive sheet. Nav lights and search light operated from transmitter.

Battery Life by Dave M Fleet Admiral!   Posted: 2 months ago
Hi Keith I see you have a 2 cell Lipo battery of 5100Ma. The charger shows Li 2S charging at 1amp with the overall voltage of 7.43volts on the charge so far. Your charger need to be set to the correct battery type if your battery is to be fully charged safely. You have a balance lead connected so the charger will take care of the process if correctly set up for the battery. There are several flavours of Li batteries so your charger need to be set for LiPo which appears to be the 2nd setting. I can't quite read the writing but suspect it is Lion, LiPo and LiFe. Your charger supports charging up the 5amp and I suggest you use this for your battery which is 5.1amp. As the charge proceeds your charger will reduce the current as full capacity is reached. My charger then flashes a message to say charge end and stops any current flow. Your may have a similar message or indication. When fully charged your battery will have a voltage of about 8.4v. You should not discharge below 6.3v which is probably where your ESC shut down power to your model. LiPos should not be stored fully charged. The safe storage voltage is 3.7v per cell or 7.4v in your case. There may be a setting on your charger that allows you to charge to this level. If you are still unsure please ask. A copy of the charger manual would help. Hope this helps.😁

Mersey ferry Rose for sale by 4clubs Fleet Admiral!   Posted: 2 months ago
1/48 scale (38inches long) Mersey ferry Rose from 1900's.2.4GHz Radio complete with radio TX batteries etc fully working model well detailed. Buyer collects from Maghull Liverpool Merseyside UK £500 ono.

raf crash tender by pmdevlin Fleet Admiral!   Posted: 2 months ago
Hi Dave, good to hear from you (sorry to hijack thread). 4 footer came out two years ago, Huntsman once in 2016, Its over 3 years since the 3 footer got wet! Orca once in 2016. I did build the PCF which I really liked, but it went immediately as too many people messaged saying they wanted it, so it funded some RC plane gear, which I am really into now. I sold a load of bits and bobs at the Blackpool show a few months ago, didn't renew with St Helens in 2015, or 2016, and wont this year. However.... Robs excellent blog has got me interested again, and Stephen kindly did a bespoke 3 d printing project on something rc related, info and pics to follow when its finished! Back on track... George, I'm going to advise only things I have done, or used, I'm not one to say do this, or that, but actually I have not done it myself. No doubt others will disagree, but this is my opinion only. Best performance in terms of speed is brushless, and lipo. Forget fear of fire and explosions, this only happens with abuse, and they are the common use with rc planes, helicopters, cars, its only boats that are really stuck in the dark ages with technology that have this big fear of brushless systems and lipos! However, to get initially set up, they do take more understanding and initial cash outlay, as you need a specific charger for one, and you do need to understand what you are doing. Brushless motors will unlease the power far more than brushed, and are usually lighter. rnigy-t600-brushless-outrunner -for-600-heli-880kv.html This motor is an example, there are much cheaper ones with similar specs, but I have used this motor in various applications, the most similar to your boat being my large Huntsman, with this motor on 6 cells lipo I achieved 25mph, but speed might not be what you want. So if you have the fast engine in your car, say a v12 Ferrari, if you run it on cheap fuel, it wont perform, same here, nicads and nimhs batteries are easy to maintain, you can drain them dead flat, but will give cheap fuel performance, like a bath tap trickling when the shower is on at the same time, and as they are dying technology, are expensive for what they are. Lipo is like turning up both bath taps and the force floods out, but now the tank will empty quicker, so you have less run time 😊 If brushless, its a specific speed controller, bbyking-50a-boat-esc-4a-ubec.h tml and you pay extra for reversing (other rc disciplines don't need reverse) and a marine esc might need to be water cooled, however, decent brushed motor speed controllers are not exactly cheap, so now you know why budget is important to give advice, you could be spending £100 here just to get up and running. Look at my 4 foot fireboat build blog, as its twin screw (personally a boat this size is better twin screw) you can get by with cheaper motors, mine where £30 the pair, I use lipo for all my boats, so I have the batteries, and are familiar with using them, the speed controllers where about £40 the pair, and if I was buying batts then probably another £40, so it all adds up! Single screw, less batteries. You could power with nimhs, and it might be acceptable ,performance for you. If your location is Ellesmere Port, have a Sunday morning drive to Hoylake, then New Brighton, and maybe take in St Helens Liverpool, and Runcorn, see boats in action, see what sort of performance suits you, and rethink the budget, what do you want to spend? Then you need the transmitter and receiver (if you don't already have these) the fittings (see Robs build blog) a prop shaft, and a suitable propeller I am North Wirral, you are more than welcome to come and have a chat and see some boats, but unfortunately I'm deep into another rc project for the next few weeks, once that is done I can share some time, if you want! Don't worry, I'm not all about speed, I can do brushed motors and nimhs and get a result, Any questions, just ask, Paul PS... Looks like a nice clean boat you have there😉

raf crash tender by Dave M Fleet Admiral!   Posted: 2 months ago
Hi George I have seen the earlier posts and can't add anything to the advice given. However if you are going to LiPo's please ask before you buy batteries or chargers. If you are wanting to go into fast speed and cost really isn't a factor, then Paul will give you all the help and advice you need. His Crash Tender is both detailed and fast👍. It won't be cheap but if speed is what you wan't then anything is possible. Paul Glad to see you are back with the model boats, may I see you at St Helens open day? Cheers Dave

raf crash tender by pmdevlin Fleet Admiral!   Posted: 2 months ago
George, is it single or twin screw, and what is your budget, motor, speed controller, transmitter, receiver, batteries? Do youi want to go fast for say 20 mins, or plod for ages! Then I can advise...!👍 Paul

raf crash tender by Haverlock Admiral   Posted: 2 months ago
within reason you are not limited to LiPo batteries. My reasons for pointing you in their direction are their ability to supply current for lower weights. I am not expert in their usage having only playing with them for a short time BUT once you take the plunge they are like everything else use some common sense and they are fine. Charging requires a LiPo charger -Power-iMAX-B6-AC-LCD-Screen-D igital-RC-Lipo-NiMh-Battery-Ba lance-Charger-/112221546397?ha sh=item1a20ece79d:g:mloAAOSwo4 pYPzgr That's the kind I use ( will charge nimh nicad and lead acid also) as to batteries some is good more is better ~laughs~ Its a case of run times at the current dumping your using I have some 5500Mah 3s ( nominal 12v ) lipo you can link batteries in parallel to get increased runtimes. One important thing to remember is not to run a LiPo down to too low a voltage the limit us usually given as 3.3v per cell so a 3s will give you a 9.9 v low point. IN practice aim for a higher cut off voltage. Depending on your radio setup ( I use frsky ) you may be able to have your battery voltages echoed to your transmitter. The charger will charge to full and also charge to storage voltages LiPo batteries must not be stored at full charge. Probably there is a lot more you need to know Dave M is way more expert than I.

raf crash tender by Haverlock Admiral   Posted: 2 months ago
Consider going brushless mechanically the motors are simpler ( no brushes) and they are more efficient. If you take the plunge and use LIPO batteries you can have any amount of performance. Not sure but I think an 800Kv outrunner would give you all the power you need and no gearbox needed. The torpedo motor has a recommended rating of Operating Voltage 12 volts. Current approx. 5.28A at max efficiency. RPM at 12.0v - 4289 at max efficiency. Weight 595g (approx) Shaft Diameter - 6.35mm The 800Kv has a 28A rating at 12 V so a wattmeter and a bit of fiddling you can match prop to motor and get some performance

Radio kit & batteries by robbob Fleet Admiral!   Posted: 2 months ago
Hi Alan. Good advice as always from you my friend 👍 but I had already taken this into account with a 'note to self' in an earlier blog posting to avoid double powering the receiver. The second battery that you see in the picture is a 6v pack just for the lighting circuits, I will be charging this on a separate changeover charge/operate switch. The receiver power switch that I have already has this function built in. Rob.