[NSRCA-discussion] Electric Data Logger

[J.Oddino]

I've got quite a bit of in-flight data from the full blown data logger with telemetry.  It is an excellent way of keeping track of your batteries especially on a new plane.  I had a helper watching the mAh used while I was flying so I wouldn't exceed 80% of the capacity.  After a number of flights I found the consumption was very consistent from flight to flight and I eventually could see I could depend on time of flight to predict battery usage.  The peak current is normally slightly lower than that during the run-up on the ground before taking off.  The current graphs are very interesting.  I find I'm only over 40 amps for about 8 seconds at a time and then well below 40 for the next 10 to 30 seconds.  The average Watts during a flight is about 900 so the motor and ESC stay quite cool. 

Jim O 


----- Original Message ----- 
  From: Ed White 
  To: NSRCA Mailing List 
  Sent: Sunday, December 03, 2006 10:22 AM
  Subject: [NSRCA-discussion] Electric Data Logger


  Anybody tried this on their electrics?  

  http://www.eagletreesystems.com/MicroPower/micro.htm

  Seems like a good way to track how much of your batteries you are using in flight.  I'm also wodering about if there is a significant difference between current measured on the ground and in the air.

  Ed



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