5 cell batteries on 2.4 on jet aircraft servos
04-12-2010, 03:43 PM
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5 cell batteries on 2.4 on jet aircraft servos
Hi guys, I know this thread is jet related but you guys have the most experience with new 2.4 systems and I would like your feedback, This is a question I have asked else where in this prestigious forum..
When freshly charged 5 cell NiMH 6 V batteries they peak at about 7 Volts. Name brand digital servos are rated up to 6 Volts... Would this extra volt burn up these servos? I will use a dual battery system for redundancy on my 2.4 receiver which is recommended for 5 cell (6V)
Some people recommnend the use of voltage regulators but others DO NOT recommend that in fact they say servos would be OK. Any enlightment?
Thanks
When freshly charged 5 cell NiMH 6 V batteries they peak at about 7 Volts. Name brand digital servos are rated up to 6 Volts... Would this extra volt burn up these servos? I will use a dual battery system for redundancy on my 2.4 receiver which is recommended for 5 cell (6V)
Some people recommnend the use of voltage regulators but others DO NOT recommend that in fact they say servos would be OK. Any enlightment?
Thanks
04-12-2010, 05:33 PM
#3
RE: 5 cell batteries on 2.4 on jet aircraft servos
I run two 5cell nimh 2700's in all my jets, no problems but I do not use JR servo's because it apparently shortens their lifespan, any other servo is fine. Radio is JR DSX9 with JR 921 rx.
04-12-2010, 07:31 PM
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RE: 5 cell batteries on 2.4 on jet aircraft servos
I have flown my 10+ year old bandit both ways, with and without regulators using the 6v 5cell dual set up with dual switches. I know that the smaller JR 351 did not like the extra voltage off a fresh charge so I did go back to 5.7 volt regulators. Although the classic Bandit is small compared to the much larger jets of today it is a system that has worked well and I just plan to upgrade to the A123's with much larger amp's available.
04-12-2010, 09:10 PM
#5
RE: 5 cell batteries on 2.4 on jet aircraft servos
when the servo is rated for 6V that's a 5 cell pack (yes even fresh off the charger) so it's not a problem, just like a 4.8v rated one is fine with a 4 cell pack fresh off the charger.
Oh, and ditto on the battery thing as well, two A123's with Fromeco regulators.
04-13-2010, 07:32 AM
#8
RE: 5 cell batteries on 2.4 on jet aircraft servos
I use two A123's through a Fromeco Kodiak switch into Futaba 6014HS Rx without any regulators, the A123's come off the charger at 7.2volts but stabaise too 6.6volts very quickly and stay at that voltage for approximatly 2000mah of their 2300 capacity. A123's require a LiFi programme on your charger and ballancing every third charge or so, they do not go out of ballance in use as quickly a LiPo.
Mike
Mike
04-13-2010, 09:02 AM
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RE: 5 cell batteries on 2.4 on jet aircraft servos
All Metal
Do you have all digital servos in the airframe? You will be fine with a 5 cell NiCad. I Dont like the NiMH (false peaking issues I have experienced). You should always know how much Milli Amps your airframe uses per flight. For me It doesn't matter if its an F-100 or a Bobcat, all of my ships use right around 350 Milli Amps per flight. You should always know how many volts and how many milli amps are in your battery. Although not recommended you can use a 4 cell pack on 2.4, and have done it with a Top Gun MiG for 3 years now. I highly recommend a Data Logger. One battery one switch. I charge after every flight. The whole point is knowing how much juice is in your system before you taxi out....Things you cant do on other systems or charging after 3 or 5 flight later.
If you have good equipment I am sure you will have great success.
good luck
Justin Sands
Team JR/Horizon
BVM rep
Do you have all digital servos in the airframe? You will be fine with a 5 cell NiCad. I Dont like the NiMH (false peaking issues I have experienced). You should always know how much Milli Amps your airframe uses per flight. For me It doesn't matter if its an F-100 or a Bobcat, all of my ships use right around 350 Milli Amps per flight. You should always know how many volts and how many milli amps are in your battery. Although not recommended you can use a 4 cell pack on 2.4, and have done it with a Top Gun MiG for 3 years now. I highly recommend a Data Logger. One battery one switch. I charge after every flight. The whole point is knowing how much juice is in your system before you taxi out....Things you cant do on other systems or charging after 3 or 5 flight later.
If you have good equipment I am sure you will have great success.
good luck
Justin Sands
Team JR/Horizon
BVM rep
04-13-2010, 09:35 AM
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RE: 5 cell batteries on 2.4 on jet aircraft servos
ORIGINAL: sandslx
All Metal
Do you have all digital servos in the airframe? You will be fine with a 5 cell NiCad. I Dont like the NiMH (false peaking issues I have experienced). You should always know how much Milli Amps your airframe uses per flight. For me It doesn't matter if its an F-100 or a Bobcat, all of my ships use right around 350 Milli Amps per flight. You should always know how many volts and how many milli amps are in your battery. Although not recommended you can use a 4 cell pack on 2.4, and have done it with a Top Gun MiG for 3 years now. I highly recommend a Data Logger. One battery one switch. I charge after every flight. The whole point is knowing how much juice is in your system before you taxi out....Things you cant do on other systems or charging after 3 or 5 flight later.
If you have good equipment I am sure you will have great success.
good luck
Justin Sands
Team JR/Horizon
BVM rep
All Metal
Do you have all digital servos in the airframe? You will be fine with a 5 cell NiCad. I Dont like the NiMH (false peaking issues I have experienced). You should always know how much Milli Amps your airframe uses per flight. For me It doesn't matter if its an F-100 or a Bobcat, all of my ships use right around 350 Milli Amps per flight. You should always know how many volts and how many milli amps are in your battery. Although not recommended you can use a 4 cell pack on 2.4, and have done it with a Top Gun MiG for 3 years now. I highly recommend a Data Logger. One battery one switch. I charge after every flight. The whole point is knowing how much juice is in your system before you taxi out....Things you cant do on other systems or charging after 3 or 5 flight later.
If you have good equipment I am sure you will have great success.
good luck
Justin Sands
Team JR/Horizon
BVM rep
I am actually using a JR 12X with 1221 receiver, dual 2700 Mah digital servos, Don't have landing gear retraction system
