I have thoroughly enjoyed reading all the great things you guys are building.
You guys really seem to know what you are doing. I am building an electric
aircraft and am hoping someone might help me figure a few things out. I have
three motor options I think will work for my prototype. The Briggs+Stratton
Etek brushless, the Perm PMG-132 w/bushes, and the Lemco Lem-200 w/brushes.
Because the Etek is brushless is it quieter? Is it more energy efficient?
Does anyone know the efficiency % of the new brushless Etek?
Which motor will drain the batteries the quickest. One that runs on 72volts
and 110Amps or one using 48volts and 165amps?
The engine will only need to run at full power for the first 2mins. After that
it will mostly run at percentages around 65% to 80% and occasionally at 0 to
descend and full power to climb.
Are there any battery packs available commercially that weigh less then 50 lbs
that could power such a set up for at least 30min? LiPo? A123? Could someone
show me how to calculate how much battery power I will need? Can I run these
batteries all the way down or do I need to recharge before they are completely
drained. Thanks for the help and great message board. -Mike
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