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Midwest Products Aero-Star .40 by SteveM. Viewed 673 times.
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SteveM02-Jun-08 17:39
Today's mail brought the rest of the Aero-Star power plant minus the prop. E-Flite Power 90, CC HV-85, CC BEC, and 2300 mAh A123 cells to be made into two 3S2P packs.
SteveM02-Jun-08 17:44
This system is far more than what is required for the size 40 Aero-Star. But the battery and prop choices I have made (14" to 15") should produce 400-500 watts which should be appropriate. Later on I can add more battery cells in series to get 1000 watts or more for a size 60 or 90 warbird.
jgood03-Jun-08 16:51
What kind of cells are they Steve? LiPo?
SteveM03-Jun-08 17:54
These are LiFe cells by A123 and are the the big brother of what I have been using in the Tyro. When abused they do not go into an exothermic reaction like LiPo, and they can be charged at 5C and discharged at over 30C. The Tyro batteries charge faster than I can drain them by flying. I got two used DeWalt battery packs but one had some sort of Sony cell in them. The fella that sold them to me is sending another with A123 cells but I am going to give the Sony cells a try as a 5S2P pack is nearly identical to a 6S2P pack of the A123 cells. But the Sony cells are only good for 10C discharge and I have yet to find out how fast they can be charged.
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