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Reply-To: "David Carter" <dcarter@datarecall.net>
From: "David Carter" <dcarter@datarecall.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-86615@logan.com>
Subject: Re: [FlyRotary] Re: Two problems solved, 2 more pop up...
Date: Mon, 24 May 2004 16:00:10 -0500
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The painted aircraft was a Cessna (aluminum).

David

----- Original Message ----- 
From: "Alex Madsen" <madsena@rose-hulman.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, May 24, 2004 1:27 AM
Subject: [FlyRotary] Re: Two problems solved, 2 more pop up...


> I am skeptical of this. Where the light colored aircraft composite? This
> would make a difference. The higher thermal conductivity of the AL would
> make it seem much hotter than composites. Both aircraft must be
> constructed of the same material. Were they?  Anyway off to look at my
> heat transfer book to see what it has to say on this topic.
> 
> Alex Madsen
> 
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of David Carter
> Sent: Sunday, May 23, 2004 11:49 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Two problems solved, 2 more pop up...
> 
> I've noticed that shiney polished aluminum airplanes are quite hot in
> the
> sun, whereas white and light cream colored painted exteriors are quite
> cool.
> I used to think and "aluminum" finish would be best for reflecting heat,
> but
> I no longer think that.  I think the same situation would prevail inside
> the
> cowl.
> 
> David
> 
> ----- Original Message ----- 
> From: "Chad Robinson" <crj@lucubration.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Sunday, May 23, 2004 9:25 PM
> Subject: [FlyRotary] Re: Two problems solved, 2 more pop up...
> 
> 
> <snip> Given that the primary goal is reflecting radiated heat (rather
> than
> "real"
> > thermal insulation) what's wrong with a coat or two of shiny silver
> paint?
> > It's not as good as polished aluminum but it's decent, and high on the
> > reflective scale. Sherwin Williams (and others) sells a product called
> > "Silver-Brite" that is marketed as "heat reflective" and "dry heat
> resistant
> > to 700degF". I haven't tested its adherence to epoxy so it might need
> a
> primer
> > coat to help it stick better (it's designed for metal) but that's not
> a
> > painful step. In any event, it would sure be a lot easier to apply
> than
> either
> > foil OR fiberfrax, especially to an oddly-shaped cowl.
> >
> > Unless real thermal insulation properties are necesary?
> >
> > Regards,
> > Chad
> 
> 
> 
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> 
> 
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