Long range video test, flying out and back to .8 miles (1.38Km). Total flight distance of 1.73 miles (2.78Km) and flight time of 4:10. I still need to purchase some new 4 cell batteries, 4 cell is the way to go for quadcopters and I hope to improve this flight time and range even further. This was only a 2200mah 4 cell battery.
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1380 meters in 90 sec = 15,3 m/s
15,3 m/s = 55 km/h
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Like I am running 14*4.7 blades at 3S and the g/W = 12.81 g/w for 640g of thrust per motor... while 11*4.7 blades running on 4S = 10.71 g/W for 650g of thrust.
So it seems that I would get a lower efficency with a 4S pack.. granted I want to use 4S so I get faster less wind prone props.
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http://www.rctimer.com/index.php?gOo=goods_details.dwt&goodsid=523&productname=
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Do you have a logger of some sort and a 3S battery.. I wonder how much wattage you are running at 3S and then at 4S to maintain hover.
I want to run 4S because right now my larger quad is greatly affected by wind.. so faster smaller blades sounds nice... but I don't think I would get the same flight time or better with a higher voltage based on the efficency table I have on the motors.
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