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Old 02-29-2008, 01:27 AM
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Mike Connor
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Default RE: (Something Fast?) Delta Build Thread


ORIGINAL: gooseF22

First motor tests went well with the A123's in 6S on a 6x5.5 apc on the medusa 2500...

Mike, can you run the numbers and see what thrust and rpm you get?

....it hits 1:1 thrust at about 2/3 throttle... and sweep the forward edge a little more to cut drag. ...I hope to maiden in about 3 weeks
ThrustHP, often better for comparison then actual data, shows a 6x5.5 prop would have to turn 25,500 rpm to generate 2.5 lbs of thrust. The medusa web site calculator shows a couple of thousand rpm less would get your there. I am not that good with the electric calculations yet.

You should be able to remove up to 10% of the vertical fin area and be fine. Any more then that is untested.

Yours should be quick to cover since it does not have a raised hatch. I cover mine in half a day but that is using three colors. I can cover the bottom in one color in about 15 minutes.

Looking forward to the maiden.