Lipo's current/question
06-12-2006 | 11:35 PM
#1
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From: San Diego,
CA, AMERICAN SAMOA (USA)
Lipo's current/question
I've had my GP reflection for about 2 weeks now. I used SS-8 BL ESC, Rimfire outrunner, and 900 maH (12C) lipo.
My lipo worked for about 1 and a half weeks and now, if I add full power the ESC will turn the power off. I'm guessing that I need higher "C". Evey time I try to add 3/4 throttle, the ESC will turn off. I don't think its the ESC's problem. The rimfire requires 15 amps of surge current. I calculated something out, and I got the answer! My battery can give olny 10.8 amps! Because 0.9 (900 mah) x 12 (C) = 10.8 amps... Now I'm wodering, should I get a 1320 Mah pack (20 C)? It would give more then enough power for my rimfire.
Is anyone using GP reflection with Thunder power 3 cell 1320 lipo? I've heard guys getting 25 minute flights on theirs..
PS: My english is bad [
] I just came here
Paul
My lipo worked for about 1 and a half weeks and now, if I add full power the ESC will turn the power off. I'm guessing that I need higher "C". Evey time I try to add 3/4 throttle, the ESC will turn off. I don't think its the ESC's problem. The rimfire requires 15 amps of surge current. I calculated something out, and I got the answer! My battery can give olny 10.8 amps! Because 0.9 (900 mah) x 12 (C) = 10.8 amps... Now I'm wodering, should I get a 1320 Mah pack (20 C)? It would give more then enough power for my rimfire.
Is anyone using GP reflection with Thunder power 3 cell 1320 lipo? I've heard guys getting 25 minute flights on theirs..
PS: My english is bad [
] I just came herePaul
06-13-2006 | 07:22 AM
#2
Senior Member
RE: Lipo's current/question
Paul,
Yes, that should work fine. Use a pack that can deliver your expected current using the 70% rule-of-thumb.
Example:
A ThunderPower 1320mAh pack can be discharged at 13C average discharge rate and up to 20C for short bursts. This means that the pack can be discharged at 17A with peaks up to 26A.
70% of 20C burst is 14C or 18amps.
Good luck!
Yes, that should work fine. Use a pack that can deliver your expected current using the 70% rule-of-thumb.
Example:
A ThunderPower 1320mAh pack can be discharged at 13C average discharge rate and up to 20C for short bursts. This means that the pack can be discharged at 17A with peaks up to 26A.
70% of 20C burst is 14C or 18amps.
Good luck!
