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Permalink Reply by Martin Seven on March 29, 2010 at 1:56pm

1.4 kg lifted by these puppies turned by these motors hooked up to this battery through these ESCs. It can barely take off at about 5 kg AUW, so I'm guessing the thrust peaks somewhere in the 50 N ballpark. It can hover at 15 amps and stay in the air for a little over 30 minutes.

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AdminPermalink Reply by Thomas J Coyle III on March 29, 2010 at 6:04pm

Martin,

Are you really using a 4S with those Turnigy motors and not having overheating problems? An eleven pound quadrarotor, I assuming that it is a quadrarotor, is huge. Can you post a picture?

Regards,
TCIII

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AdminPermalink Reply by Thomas J Coyle III on March 29, 2010 at 5:59pm

Robin,

Try this website's forum for numerous examples: http://aeroquad.com/

Regards,
TCIII

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Permalink Reply by Troy Reabe on April 28, 2010 at 12:03am

Sorry is this sounds harsh but just a quick reply

for a quad, you need to pick one of the varables you have listed and go from there. So lets start with the airframe weight; this would be the finial wight. you want a motor/prop setup that can provide at lease 2x the thrust as the weight, more =better

for a copter of any sort the bigger the rotor disk the more thrust you can get, to a point.( just like in planes push forward to go down, pull back slightly to go up, and pull all the way back to go down)

airframe weight: as light as you can
motor thrust: as much as you can
propeller sizes: a simple static test at about 70% power and pick the one with the most thrust
battery type: Lipo

If you want to give a starting point of what you want for a finish product I could help you pick out some parts.

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