Question about Extra Cell in RX pack
03-26-2003, 02:43 PM
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Question about Extra Cell in RX pack
I'm a real noob when it comes to these RX packs. I bought a used radio at a swap meet a while back and I found that the guy has put an extra cell in the RX pack. He told me it pushed the servos a little harder? Is this true? I've got the setup in a plane of mine and the whole thing is pretty snappy. I haven't had any problems with it.
My question being, can I do this to my one of my hitec setups? It looks like a standard 600mAH 4 cell pack. Would adding another cell give it some more power? It's a simple Focus 4 with HS300 servos, very basic, but It would be nice to get a little bit quicker movement from them.
My question being, can I do this to my one of my hitec setups? It looks like a standard 600mAH 4 cell pack. Would adding another cell give it some more power? It's a simple Focus 4 with HS300 servos, very basic, but It would be nice to get a little bit quicker movement from them.
03-26-2003, 04:10 PM
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Question about Extra Cell in RX pack
The only way you can get more power is by putting in a bigger engine
For practical purposes, you will not notice, any improvement with an extra cell in your application.
For practical purposes, you will not notice, any improvement with an extra cell in your application.
03-26-2003, 04:42 PM
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yes
Yes, if you use a 5-cell pack instead of a 4-cell, you now have more power to output to your servos. You should read the manufacturer's recommendation to determine the max voltage Rx pack you can safely use.
03-26-2003, 05:23 PM
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Pros and cons of 4 vs 5 cell packs for rx
4 vs 5 cells for receiver packs
· 4 cells cost less
· 4 cells are more reliable than 5 (more parts/connections = less reliability)
· 4 cells give you longer flying time than 5 cells of equal capacity
· 4 cells are lighter
· 4 cells put less stress on radio and servo components (unless regulator is employed)
· 5 cells give you faster servo response
· 5 cells allow for voltage regulation to give you constant servo response.
· 5 cells give you a margin of safety if one cell shorts (but this is a rare occurrence in flight – if you don’t do an ESV check before you start flying, then you deserve what you get.)
Usually same charger that comes with your radio system will accommodate both 4 and 5 cells, for 5 cells the charge may take slightly longer. A standard Futaba Charger will charge 5 cells at about 40 mA, whereas it charges a 4 cell pack at 55 mA. For 5 cells charge 20% longer.
All present day radio systems seem to accommodate 5 cell receiver packs without problems.
· 4 cells cost less
· 4 cells are more reliable than 5 (more parts/connections = less reliability)
· 4 cells give you longer flying time than 5 cells of equal capacity
· 4 cells are lighter
· 4 cells put less stress on radio and servo components (unless regulator is employed)
· 5 cells give you faster servo response
· 5 cells allow for voltage regulation to give you constant servo response.
· 5 cells give you a margin of safety if one cell shorts (but this is a rare occurrence in flight – if you don’t do an ESV check before you start flying, then you deserve what you get.)
Usually same charger that comes with your radio system will accommodate both 4 and 5 cells, for 5 cells the charge may take slightly longer. A standard Futaba Charger will charge 5 cells at about 40 mA, whereas it charges a 4 cell pack at 55 mA. For 5 cells charge 20% longer.
All present day radio systems seem to accommodate 5 cell receiver packs without problems.
