Jan 262014
 

IMG_20140126_123343Grabbed the battery by the leads, and did some radical surgery! The truth is, I did not have a 4S handy, but 2 pieces  of 2S were waiting to be used for something. It’s one of these things where the warning label says: Only do this under the supervision of a responsible adult.  Since I’m slowly converting to the yellow connectors, I went from there. My Unilog current sensor is one with 4 mm connectors. Therefore some surgery was required. The end result is a more compact unit, where one side still has my 4 mm anti-spark connector, while the other side has a matching yellow bit.  Size and weight wise I am more or less close to where I was before. The only trade-off is the capacity of the battery, it’s slightly lower of course. But since it’s a glider, who cares. I just finished charging and gave it a try.  57 Amps! Now we’re talking 😉 That’s approx 850 Watts static. Slightly higher then the previous 300 Watt. My battery is a Nanotech 2650 mAh, rated at 20-50C. 20C is 66 amps, so I am safe there. My controller is a Robbe BL 690 , which is good for 70 Amp peak. I know the motor is good for 450 Watt. Ouch!  Got another prop somewhere: 15 * 8 in stead of 17 * 8 Aeronaut. Testing again (static) I read 45 Amps or 675 Watt. That feels slightly safer for now. It used to take 15 sec’s at a leisurely pace to get to 100 odd meters.  Double the power is double the height? I’ll go for a 10 sec run first!

What happened to all the Big planes? Nothing, we are in an nature conservation area,  not allowed to fly combustion engines from Nov-April.  Never mind that my Carden makes less noise then a 1000 geese! It’s something we have to live with.

 

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