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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-225031@logan.com>
Subject: Fly cooling was Re: [FlyRotary] Re: Everybody ok?
Date: Thu, 24 Jun 2004 14:37:46 -0400
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Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message ----- 
From: <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, June 24, 2004 1:38 PM
Subject: [FlyRotary] Re: Everybody ok?


>
>
>
> > Interesting trim actuator... how do you wire it in?
> >
> >      <M>
> >
> >
> > Ernest Christley <echristley@nc.rr.com> wrote:
> >
> >  I've been trying to actually get some airplane
> parts built.  Did
> > somepainting this week.  Here's the result.
> >
> >
>
>
> I guess the plan was to have an intelligent trim
> actuator.  It was supposed to flap real hard as it
> got close to the ground. No wires or switches to
> worry about.
>
> Looks like I'll have to do some redesign, 'cause it
> appears that the paint will kill the fl^H^Hactuator.
>
> Just had another flash of brilliance...Ed, do you
> have any equations that would compute the cooling
> ability of a streamlined duct ehnanced with flies!?!
>


Well, lets see.... yep, just found a formula for that design approach.

It looks like that the enhance cooling would be proportional to the linear
increase in the number of flies you could harness to fly in close formation
just behind the cooler core.  It should produce approx. 300% increase in
cooling effectiveness for the typical evaporator core.  Unfortunately, the
calculation also shows that the fly mass will go up to the cube of the
number of flies used which means the gross weight of the cooling system
would increase by approx. 2700% for the typical experimental.  Oh, here is a
foot note.  "...fly excrement covering the canopy proved to be a design
challenge not yet overcome.."

Well, looks like you could do it - but you wouldn't like the results {:>)

Ed