That's a great video, thanks Steve!
As to the conclusion that this would be "impossible without the Lithium
Batteries" I offer a different view:
The RC aircraft hobby has succeeded well for over a decade with NiMH
batteries and NiCds for decades before that. The hexacopter would work fine
with either of these earlier battery types---only drawback would be greater
weight and size for a given capacity. Given its ability to lift a full coke
bottle, the extra weight wouldn't be an issue at all for its ability to
fly---maneuverability is surely improved with the compactness of the lithium
batteries for sure, but outside of maneuverability, there isn't anything
impossible here that NiMH couldn't do.
The most important factors making this 'copter a success are high
performance motors (thanks to NdBFe magnets), modern high-density
electronics including microcontrollers, gyros, accelerometers and GPS
modules. To make even a 2-axis auto-stable helicopter 20yrs ago typically
required incorporating 2 Sperry gyro modules that were about 3"diam each---a
former colleague of mine did this.
There are still a lot of folks using NiMH batteries for gliders, planes and
perhaps helicopters in the RC hobby. Of my several gliders, only one uses
Lithiums (Kokams) and only because the entire payload cavity is 1"dia or
less and about 3" long.
Anyway, very very cool 'copter. Thanks for posting this!
-Myles
-----Original Message-----
From:
[email protected] [mailto:
[email protected]] On Behalf
Of Steven Lough
Sent: Sunday, February 13, 2011 4:34 PM
To: SEVA; EVDL Receiver
Subject: [EVDL] OT OT OT - but TOO fantastic to not share with my engineer
and tekky Friends
And it all would have been impossible without the Lithium Batteries we
are all going to
be using in our EV's
Much engineering data, and more than a few Videos other than this first one
AT: http://mikrokopter.de/ucwiki/VideoAbspielen?id=188
--
Steven S Lough
President: Seattle EV Associatin
206 524 1351
WEB: www.seattleeva.org
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