Proposed glow-to-electric conversion rule of thumb?
06-21-2005, 11:46 AM
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Proposed glow-to-electric conversion rule of thumb?
As time goes on we get more and more data points for glow-to-electric conversions, and I personally am starting to see a trend here with sport planes.
It seems that for roughly every .10 cubic inches of glow displacement, we tend to use 1 LiPoly cell at ~40 Amps:
"25-size" conversions use a 3S LiPoly pack.
"40-size" conversions use a 4S LiPoly pack.
"46-size" conversions use a 5S LiPoly pack.
"60-size" conversions use a 6S LiPoly pack.
A "90-size" conversion would fly extremely well on a 9S LiPoly pack at 40 Amps if you extrapolate.
That covers the lion's share of conversions that a typical sport flier would want to perform.
My logic is that you're looking for ~100 Watts per pound, and typical sport planes in each of these size ranges run roughly the same weight, give or take a few ounces. .25-size runs in the 3-4lb range. .40-size at 5-6lbs. .46-size at 6-7lbs. .60-size at 8-9lbs.
It seems that for roughly every .10 cubic inches of glow displacement, we tend to use 1 LiPoly cell at ~40 Amps:
"25-size" conversions use a 3S LiPoly pack.
"40-size" conversions use a 4S LiPoly pack.
"46-size" conversions use a 5S LiPoly pack.
"60-size" conversions use a 6S LiPoly pack.
A "90-size" conversion would fly extremely well on a 9S LiPoly pack at 40 Amps if you extrapolate.
That covers the lion's share of conversions that a typical sport flier would want to perform.
My logic is that you're looking for ~100 Watts per pound, and typical sport planes in each of these size ranges run roughly the same weight, give or take a few ounces. .25-size runs in the 3-4lb range. .40-size at 5-6lbs. .46-size at 6-7lbs. .60-size at 8-9lbs.
