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>> Home > Tags > lipo

Longer run time by Haverlock Fleet Admiral!   Posted: 6 days ago
Your question does not have simple answers have you used a watt meter to see the current your motor is drawing at full throttle? With any installation its a good idea to do that test since its a good way to match motor and prop. LiPo batteries have a better current delivery than lead acid BUT you do need to be careful about end voltages so as not to damage the battery. Many ESC have a voltage cut off built in to protect LiPo batteries it may be your hitting that limit with your lead acid battery. The simplest solution to your problem is to look at the Amp/hour rating of your existing battery and get something with a higher rating. Going LiPo can give a much higher rating with a LOT less weight. The downside being the need for a special charger and the need to be careful about storage and end point voltages. As to putting 2 batteries in series to get a higher voltage yes you can BUT increasing the voltage to a brushless motor requires you match the prop to the new voltage running on the existing prop will probably cook the motor. How hot is your brushless running now? Outrunners generally can swing a bigger prop than inrunners.

Longer run time by RNinMunich Fleet Admiral!   Posted: 7 days ago
Hi, Lead acid doesn't like delivering the high currents brushless motors want. They are more suited to long term low currents. Go for a LiPo, 3 or 4S, something 7AH plus should keep you going for a while. Don't put batteries in parallel as one will inevitably try to charge the other, unless you have a hi power diode board in between them to prevent that. Cheers, Doug 😎

Bow wave suppression by wunwinglo Lieutenant   Posted: 13 days ago
Hi Floating Voter, I do so agree that I should be flying, not ploughing. In fact, she does plane quite well, but she is 'dirty' at very high speeds.I am concerned that sooner or later, I will have electrical problems, despite trying to be careful not to overuse the throttle. She is fitted with 2 x JP EnErG brushless 600 O/R 1550 (C35 141), driving 38mm scale-type brass three bladers, contra-rotating. The pack is a 7.4 v, 30C lipo.

Bow wave suppression by FloatingVoter Seaman   Posted: 16 days ago
Aren't you supposed to be riding over that bow wave not wallowing in it? If you have Lipo batteries you probably have brushless motors (kV? how many cells?) - try a smaller prop - much smaller - let the motors run free and show what they are capable of.

Bow wave suppression by wunwinglo Lieutenant   Posted: 17 days ago
Hi Doug, They are Lipo's, small and in the stern already!

Charging NiMhs, one for Doug?... by RNinMunich Fleet Admiral!   Posted: 17 days ago
Mornin' John (aka Sleepless in Unknown, UK, 😉) That's exactly the jig I found recently for the batch of XT connectors I bought when I finally went LiPo (better than NUTS!). Ref. your 'wall wart' (horrible expression, must have come from our 'colonial brothers. Sorry Ed!)- If the resistor burnt out I'd be very surprised if the rectifier wasn't also damaged. Check the voltage with your multimeter in both AC and DC ranges and let me know the results. Also give me the data of the 'wart'. Input voltage, W or VA rating, output voltage and current. Should all be embossed on the thing somewhere. Cheers, Doug 😎

Charging NiMhs, one for Doug?... by Westquay Fleet Admiral!   Posted: 17 days ago
Thanks Doug, I'll copy that down and pin it to the wall! H, the LiPo in the TX has just 4 gold pads on one end. No way to charge it anywhere else. Martin

Charging NiMhs, one for Doug?... by Haverlock Fleet Admiral!   Posted: 17 days ago
Lipos can be taken to a storage setting which is supposed to keep them good for a long term storage. You can still use the imax just make up a lead with a couple of crock clips to clip to the TX battery.

Charging NiMhs, one for Doug?... by RNinMunich Fleet Admiral!   Posted: 17 days ago
Hi Martin, No need to get yer knickers in a twist 😲 With the NiMh just stick 'em on your iMax every 2 months and run 'em through a discharge / charge cycle. Otherwise in three months they'll probably be Dodo-like 🤔 NiMh batts lose about 1% charge per day. So, assuming fully charged to start with, they will die in about three months. They should not be discharged below 1.0V per cell or they most likely will not recover and will not take a charge anymore. Your TX LiPo you have no control over so just rely on the charger in the TX. Over winter just switch it on every month or so and check if the red LED lights. If it does stick it on charge until the green LED lights again. Your other LiPo you can give a Storage charge with the iMax. Check it with your Capacity Tester now and again. Storage charge will probably indicate 30 to 50%. If it's less than 30% put it on a Storage charge again. Voltage per cell should never be allowed to go below 3.0V MINIMUM. Start a Battery Diary!! Cheers, Doug 😎 Back to hull sanding for me 😡 P'ing down again today so no outdoor spraying🤔 Just discovered construction fault in my fish cutter😲 First hull planks were set flush with the keel bottom instead of leaving about 1/4" of keel showing 😭 To saw or not to saw ? That is the question!!

Charging NiMhs, one for Doug?... by RNinMunich Fleet Admiral!   Posted: 17 days ago
Mornin' Martin, You don't need to cycle LiPos !!! Play 'silly buggers' with it and you might bugger it! 😡 Just use it normally and charge it when the red lamp appears on the TX front indicating low voltage. Keep an eye on it and unplug the USB charger lead as soon as the LED turns to green. You could also use your Capacity Tester to check the LiPo status, IF it will connect to it. Sounds like it has a very non-standard plug? Pic? The cycling is for NiMH batts to minimise the memory effect. Cheers, Doug 😎 PS Just checked the manual and saw the battery connector! You can forget connecting the battery to any other charger or the Tester 🤔

Charging NiMhs, one for Doug?... by Westquay Fleet Admiral!   Posted: 17 days ago
I guess the imax would, Haverlock, but for the fact that the LiPo in the Tx. has it's own built in connectors on the end of the case which connect with four sprung thingies in the Tx.'s battery box, so I suppose it has to be charged in situ, like a 'phone or a screwdriver/drill. I'll have to just play silly buggers with it to cycle it. Martin

Charging NiMhs, one for Doug?... by Haverlock Fleet Admiral!   Posted: 18 days ago
more on the care and feeding of the strange beast called LiPo

Charging NiMhs, one for Doug?... by Haverlock Fleet Admiral!   Posted: 18 days ago
your IMAX charger will handle a single cell LiPO fine! so you can put the LiPO into its storage state if your not going to use the TX for an extended time. style='background-color:yellow;'>lipo-battery-guide.html Some good data there on the care and feeding of LiPo batteries

Charging NiMhs, one for Doug?... by Haverlock Fleet Admiral!   Posted: 18 days ago
If the charge lead plugs into the transmitter while the LiPO is still connected it probably has the needed electronics to limit the charge. Failing that you can charge the LiPO from your main charger just plug the LiPO lead into the charger balance port

Charging NiMhs, one for Doug?... by Westquay Fleet Admiral!   Posted: 18 days ago
Hi Doug, the battery in the new FlySky Tx is a 1s LiPo, so 3.7volts. It's 800 Mah and the set comes with a charge lead from a USB port. But they're 5 Volts, aren't they? So wouldn't that damage it? And they don't cut off when charged do they? Chris's efags are done that way as is her phone and I had a 4 port USB thingy in the glove compartment of me Reliant Fox for Chris's fags and phones. Now I have a neat tower of 6 mains sockets and 4 USB ports and they are down as 5 volts too. I have it to use shorter leads on all my small power tools and to charge stuff. As long as I'm not risking frying a LiPo, I'll be happy! Cheers, Martin