Re: [HOE] Re: hoe-digest.20010121

[Sam & Max <samnmax@swbell.net>]

Patrick Phalen wrote:
> 
> > Hmm. . . anybody know what the real world affect of
> > multiple rotors are?
> 
> The simple answer is it depends...
> On a bigger copter it is most likely for added stability...
> For something like an Apache (or Hind) it is more sound
> dampening.  IIRC, there is some very complicated
> Bournouli-type equation going on describing the turbulent
> flow of the air around the rotors (and the speed at which
> they move)
> 
> If you've ever NOT heard an Apache (or Hind) creeping up on
> you, you'd understand the result...
> 
> Patrick "Not that I've *actually* seen a Hind, mind you,
> nor know that an Apache is quieter" Phalen

Sorry Pat, but on this one I have to mention that the Hind is without a doubt
the god-ugliest loud helicopter I have ever heard. The thing is just loud. And
if you ever get a chance they do have a fully flight worthy member of this
beastie at Fort Hood Texas. The Hind-D variant. Trust me, you will hear it loong
before you see it.  :) 
-- 
David Heth