Don't understand
#1
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Don't understand
I see a lot of talk about RX batteries and how many flights you can get with them. If you have to buy a new battery why not get something like a sanyo 2500. For about 20 bucks. I normally use 6v and I am running sanyo 2700. Not that I want to fly all day, but at least I can fly 3-4-5 times then recharge. maybe my thinking is all wrong. I guess if you are going to run the battery close to marginal doesn't make any difference if it iis 600 or 2600. Just my 2c.
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RE: Don't understand
Size and weight can be a problem. There's a heckuva difference between a 4c 700 NiMh pack (AAA cells) and a 5c 2700 NiCd pack (C cells). With a big plane I agree, but I had fits in one of my planes (Modeltech Magic Extra) trying to squeeze a 600 4c NiCd in. Other planes just can't tolerate the several ounce difference in weight, or at least the placement of a heavy battery such as that. All things being equal, I agree, bigger is better, 5c's better than 4c.
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RE: Don't understand
Depending on what kind of current you're drawing for the reciever, a 600 mah battery pack will last MUCH longer than 3 or 4 flights. Even if you're drawing 600 mA to power all your servers and reciever, which is a pretty healthy rate, the battery should last about an hour.
Brad
Brad
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RE: Don't understand
I guess I was just using a figure of speach when I said 3-4-5 flights. I really don't know how many flights I could fly because I see very little drop in 4 flights. Even on my 4.8v I use the sanyo I think it is about 1700, not sure .
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RE: Don't understand
The other thing to remember is that a big battery will take longer to charge than a smaller one. Fine if you need the extra grunt, but if you don't why haul it?
I run most of my smaller stuff on 800mAh batteries which will charge up overnight on a wall wart. Bigger stuff gets bigger batteries and I have to think harder about charging, which makes my brain hurt[:@]
Just my $0.02 worth!
Terry
I run most of my smaller stuff on 800mAh batteries which will charge up overnight on a wall wart. Bigger stuff gets bigger batteries and I have to think harder about charging, which makes my brain hurt[:@]
Just my $0.02 worth!
Terry
#6
RE: Don't understand
I have JR Sport systems in most of my planes, and they come standard with a 700mAh NiCd pack. These are usually good for 4-5 flights, unless it is on the cold side. On my regular flyer, my Four Star 40, I bought a JR Sport 1500mAh NiMh pack for $19.99 and that pack will fly all day. It is the exact same size and weight as the standard pack.
#7
RE: Don't understand
I have an old champion eindecker that has a cox dragonfly .049r/c on it and 3 tower tss-10 servos and a 4 ch mini reciever battery is only 100 mah total weight is 16 oz and the flights are only about 5 minutes long on 3/4 oz of fuel.any larger battery would add to much weight and it is usually the 3rd or 4th plane that I bring for a flying sesion.
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RE: Don't understand
I use 1500mah Nicad or 2000mah Nimh on all my planes. I can fly all weekend without worry.
And if you are using a good charger it doesn't take any longer to charge, overnight slow charge always does the job.
And if you are using a good charger it doesn't take any longer to charge, overnight slow charge always does the job.
#9
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RE: Don't understand
My arguments for staying with lower capacity (500-700 mAh) NiCd batteries are:
1) They give me more than enough capacity for the amount of flying I want to do in any given day.
2) They are inexpensive and highly reliable
3) They last a really long time. I have some packs that are 7 years old and still cycle and self-discharge like new.
4) It is a simple matter to charge them overnight with a C/10 wall wart for the next day's flying.
1) They give me more than enough capacity for the amount of flying I want to do in any given day.
2) They are inexpensive and highly reliable
3) They last a really long time. I have some packs that are 7 years old and still cycle and self-discharge like new.
4) It is a simple matter to charge them overnight with a C/10 wall wart for the next day's flying.
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RE: Don't understand
wow only 4-5 flights on the 700? I average 12-13 a day and have to charge nightly. Im flying a big spad and load alot on the servos too. hmm
i guess im lucky flying
i guess im lucky flying
#11
RE: Don't understand
ORIGINAL: amdhotprocessor
wow only 4-5 flights on the 700? I average 12-13 a day and have to charge nightly. Im flying a big spad and load alot on the servos too. hmm
i guess im lucky flying
wow only 4-5 flights on the 700? I average 12-13 a day and have to charge nightly. Im flying a big spad and load alot on the servos too. hmm
i guess im lucky flying
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RE: Don't understand
also look at the servo you are running. when i fly my alpa the 900 or 1100 (which evercame with it) i could fly all day with st 47 standerd servos. that pack would last 1 flight with my funtana digital servo's. digs's need more power. i all use a volt watch but it most just for back up every 2 or 3 flight i rechage a 2500 6 volt just peace of mind ( i would hate to lose my plane becuse of some as dumd as not chargeing the pack)
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RE: Don't understand
Funny,
Even the smallest servo and RX combo will never last 12-13 flights reliably with a 600-700 MAH pack. That is, unless the flights are very short and unventful.
Long ago, I switched to LiPoly. Larger capacity, less weight and more reliability. I really like the stability and shelf-life too. NiCD and NiMH are fine, just heavy, bulky and a bit too 'old-school' for me.
HOWEVER, they are cheap, fairly reliable, and the weight savings of lithium is really only important for aerobatics and pattern.
Even the smallest servo and RX combo will never last 12-13 flights reliably with a 600-700 MAH pack. That is, unless the flights are very short and unventful.
Long ago, I switched to LiPoly. Larger capacity, less weight and more reliability. I really like the stability and shelf-life too. NiCD and NiMH are fine, just heavy, bulky and a bit too 'old-school' for me.
HOWEVER, they are cheap, fairly reliable, and the weight savings of lithium is really only important for aerobatics and pattern.
#14
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RE: Don't understand
I get about 75 minutes of flying time from a 600 mAh NiCd pack with about 40% capacity left in the pack at the end of the day. This is on a 5 servo 40-sized sport plane using standard servos (not digital). For me this is 5 flights. I tend to have long flights. Some at my field keep their flights much shorter, so I guess I could see someone claiming 10 flights with a conservative reserve.
The reasons I like NiCd are because it is very mature and very reliable technology. I believe NiCd is more reliable than NiMH and LiPO. I want to fly, not mess around with batteries, but I can certainly understand how someone would feel differently.
The reasons I like NiCd are because it is very mature and very reliable technology. I believe NiCd is more reliable than NiMH and LiPO. I want to fly, not mess around with batteries, but I can certainly understand how someone would feel differently.
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RE: Don't understand
well im flying a spad with 3 futaba 3004 and a micr on the throttle, but even the guys who fly the nicer planes get 5-6-7 out of them and these are planes with 5-7 servos. I guess it makes me a little upset because i switched to nitro to not have to wait on dumbass batteries. I hate waiting on batteries. I need about 30 rx pacs and a BIG charger... I got an idea!
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RE: Don't understand
Hi!
Where do you find R6 size NiCad batteries today???? Not in Europe anymore, that's for sure!
Over here we use only NiMH cells or Lipos . You can get 2800 mAh cells the same sixe and weight as 500 or 600mAh NiCads. So why use "small" 600mAh cells ???
I solder my own batteries using GP or Sanyo cells.
Where do you find R6 size NiCad batteries today???? Not in Europe anymore, that's for sure!
Over here we use only NiMH cells or Lipos . You can get 2800 mAh cells the same sixe and weight as 500 or 600mAh NiCads. So why use "small" 600mAh cells ???
I solder my own batteries using GP or Sanyo cells.