Why so long a flight times?

[picasso]

I noticed on some of the UAV's that are using Lipoly batteries they are getting an hour to an hour and a half flight times. Whats different about these planes as opposed to your normal park flyer? One of the planes is the dragonfly at http://www.rctoys.com/predator.php

[CactusJackSlade]

Wing area and motor/battery combinations.

If you notice, UAV's are more like gliders with motors = high lift wings... add an efficient power source and you have nice long flights.


I regularly get 1 hour on my set-up.

CJS

[picasso]

What do you fly? I would love to get an hour of fly time. Thanks...

[Vindication]

Another big difference:

When you flying RC people have the tendency to fly with the throttle open. If you fly w/ the throttle nearly closed you will get really good flight times. Flight time just equals = lift/drag efficiency + motor consumption + batt capacity.

-Vind

[CactusJackSlade]

What do you fly? I would love to get an hour of fly time. Thanks...

The Depron Dragon: Lots of wing area, FAT and slow airfoil minimal motor combo for the application. I'm currently running 2 x 1320 mAh Lipos to get 1 hour... I just bought 2 1650 mAh Lipos... should be good for almost 1.5 hours.

All this said, that is on a no wind day and flying conservatively.

Try this search on the Depron Dragon:
http://www.rcgroups.com/forums/search.php?searchid=5282261