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Date: Thu, 03 May 2012 13:20:51 -0400
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Subject: Re: [LML] Necessity of A/C in IV-P?
From: "William A. Hogarty" <billhogarty@gmail.com>
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Sometime in the last century, one of the original Lancair engineers
told me that even with the 3rd intercooler, the
air coming into the cabin of the IV-P would be no less than 1.16 x
ambient.  Since the wife likes to see the shows
in Vegas, adding A/C was a no-brainer once I found out that TCM makes
a special adapter for the TSIO 550 to hang
a small  compressor off the back of the engine.  I had to move the
battery back behind the pressure bulkhead, but
getting it away from the heat of the engine compartment didnt hurt.  I
even figured a way to avoid cutting holes in the
bottom of the fuselage. Total cost for the added components was in the
neighborhood of $ 2K.


On Thu, May 3, 2012 at 5:28 AM, Jim Nordin <panelmaker@earthlink.net> wrote=
:
> It can be really warn even at 17,000 feet without A/C in an IV-PT. Why? T=
he
> bleed air is super warm. Absolutely necessary? Not IMHO. But a few letdow=
ns
> from 20k+ and a drip drip drip off the end of your nose will tell you it=
=92s
> nice. Or in summer heat in Houston, Phoenix or some other sauna, it is ev=
en
> better than nice.
>
> Wouldn=92t it be good to use that air to air heat exchanger in line with =
the
> bleed air to the cabin? HEAVY.
>
> Jim
>
> ________________________________
>
> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Da=
n &
> Kari Olsen
> Sent: Wednesday, May 02, 2012 11:05 AM
> To: lml@lancaironline.net
> Subject: [LML] Necessity of A/C in IV-P?
>
>
>
> LML Gang,
>
>
>
> With all the discussion of structural integrity compromises of the IV-P
> fuselage by cutting air conditioning holes, I have a question for you
> seasoned IV-P drivers=85=A0 How necessary is air conditioning in this air=
craft?
>
>
>
> I have been flying my 320 for almost 9 years now and certainly would love=
 to
> have had it during ground operations on hot summer days with the green ho=
use
> canopy.=A0 However, once moving and at altitude, there is no need.=A0 I r=
ealize
> that the IV-P is going to have warmer air because of the pressurization b=
ut
> it is also typically flying much higher (colder ambient) and it doesn=92t=
 have
> the bubble canopy.
>
>
>
> So, in normal cross country cruise operations above FL180, do any of you
> that don=92t have A/C *really* wish that you had it?
>
>
>
> I=92m early in the building of my IV-P and don=92t want to put it in for =
several
> reasons:
>
> =B7=A0=A0=A0=A0=A0=A0=A0=A0 Weight
>
> =B7=A0=A0=A0=A0=A0=A0=A0=A0 Potential structural issues
>
> =B7=A0=A0=A0=A0=A0=A0=A0=A0 Cost
>
> =B7=A0=A0=A0=A0=A0=A0=A0=A0 One more thing to break down the road
>
>
>
> I live in Colorado and will be using this plane as a cross country travel=
er
> with my wife, so comfort is certainly a factor but not at all costs.=A0 O=
ne
> thought is to get one of those cooler-with-ice-and-a-fan systems to toss =
in
> the back seat for those few days that are very hot.
>
>
>
> I appreciate your input.
>
>
>
> Dan Olsen
>
> Fort Collins, CO
>
> N320DK =96 640hrs
>
> IV-P =96 10% done