[ExI] flying cars?
spike66 at att.net
Sat Jun 25 05:31:50 UTC 2011
From: extropy-chat-bounces at lists.extropy.org
[mailto:extropy-chat-bounces at lists.extropy.org] On Behalf Of Keith Henson
Subject: Re: [ExI] flying cars?
On Fri, Jun 24, 2011 at 7:31 AM, spike <spike66 at att.net> wrote:
>> Hi Keith, this is cool, but... What he has there I think is actually
strictly a hovercraft.
>Could be. But what I think is likely or if not in this case shortly is the
application of a lot of computation to control.
>You can see that in those little electric quad and hex helicopters. Keith
Ja, I can imagine something like this in freeflight with four rotors in a
cruciform configuration. With only the two and only thrust vector control,
you can almost see the instability in any flight regime out of ground
effect. A gust of wind or any perturbation, over it goes in a roll,
entering a mode which thrust vectoring provides insufficient control
authority to recover, even if you assume perfect compensation. We had a
saying for that. With some flight configurations, it was said this craft
could not be stabilized even with god at the controls.
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