stunthanger.com
Electric Stunt => Gettin all AMP'ed up! => Topic started by: Darkstar1 on December 20, 2009, 02:28:19 PM
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On a much nicer day today success was had with the Eratix stunter. After the changes were made from the first
time I was able to get a RPM and prop setting that was right 4 me. At least I can fly short flights and trim the model until It's ready for a full run. With a APC 12.75-13in 4.5p at 10,000 RPM I can fly at 5.3sec laps with consistent line tension everywhere. After the basic trimming chores were done, I let Frank Williams loose at it. (I think I may have
corrupted him again.) Sorry Sally. <= Ill put the details on the set up thread. Now I can get busy again! Heres's
the data from the last three flights.
Later.
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Darrell,
You can tell on the second flight with the same battery that you are starting to run out of steam (or "juice") when the Motor Power Out is hitting 100%.
I think this means you need a slightly larger battery, or a slightly higher kV, or a slightly higher prop pitch that allows you to drop the rpm a bit.
The drain is claiming that you used 2250 mAHr for the first two flights (which were on the same pack I believe). I don't recall the pack size, but it should be at least ~2800mAHr to keep to the 80% rule.
But at least you have flying weather! :'(
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Alan,
The batteries are all Turingy 4000mah 4cell batteries. The last flight Frank flew that battery was fully charged
I am already thinking about buying a couple of TP 5 cell 33-3900 batteries. U are right I could and probably
play with some of the variables to get better performance. Better start repitching props S?P Thanks.
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I would just repitch slightly---maybe to 5", and see where that gets you.
Might as well setup for a real full pattern and see where the motor output power % goes to. The object is to always be something less than 100%.