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Remote Control Info
I am looking into a new Hobby of a Remote Control Quadcopter, but I have learned I need to learn a lot and I am going to put some of it here. Please note: I am new to this so any of it could be wrong!.
• Battery Basics
The most common battery for RC is now the Li-Po and I wanted to know what the different numbers, ratings, capacity etc... were.
• Voltage - First there is the S# number which the number of cells it has each puts out an average fo 3.7 volts.
• 1S = 1 cell x 3.7V = 3.7V
• 2S = 2 cells x 3.7V = 7.4V
• 3S = 3 cells x 3.7V = 11.1V
• 4S = 4 cell x 3.7V = 14.8
• 5S = 5 cells x 3.7V = 18.5V
• 6S = 6 cells x 3.7V = 22.2V
• 7S = 7 cell x 3.7V = 25.9V
• 10S = 10 cells x 3.7V = 37.0V
• 12S = 12 cells x 3.7V = 44.4V
• 14S = 14 cells x 3.7V = 51.8V
• There also Packs so a 3S2P would be a 2 Pack of 3S batteries put togethter to increase capacity.
• Capacity - This is the MAH rating or how much power it can hold.
• 1800MHA would put out 1800 mA (milliampere) or 1.8 Amp for an hour. The same battery could put out 3600 mA for 30 minutes, etc...
• They range from 120MHA to 180MHA for small S1 batteries to 1800MHA to 2200MHA for a standard 3S used in a average quadcopter.
• Discharge Rate - The C# show the maxiumn mA it can put out without harming the battery.
• 1800MHA with a 20C could safely put out 1800 X 20 = 36000 mA and at the maximun rate it would only last 3 Min. (60 min / 20 = 3)
• If you discharge a battery too fast it will get warm or even hot and do it to many times can ruin it. So if the battery you are using get warn after each use it will not live long and you should move to a higher C rating.

• Brushless Motor Ratings Basics
Looking at a quadcopter motor from HobbyKing. It has numbers of 2215 3550kv
• The 2215 indicates the Stator Size of 22mm by 15mm the main part inside the motor.
• The 3550kv means it will spin at 3550 rpm for each volt on it. Using this with a S3 battery at 11.1V it would spin at 39405 rpm.
• In the specifications should be a voltage range it can take, sometime listed as the batteries to be used with it. Also they list a rating shown in A (amps) as to how strong of an ESC (Electronic Speed Controller) is needed to power it.