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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? The
bleed air is super warm. Absolutely necessary? Not IMHO. But a few letdowns
from 20k+ and a drip drip drip off the end of your nose will tell you it’s
nice. Or in summer heat in Houston, Phoenix or some other sauna, it is even
better than nice.
Wouldn’t 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 Dan &
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… How necessary is air conditioning in this aircraft?
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 house
canopy. However, once moving and at altitude, there is no need. I realize
that the IV-P is going to have warmer air because of the pressurization but
it is also typically flying much higher (colder ambient) and it doesn’t have
the bubble canopy.
So, in normal cross country cruise operations above FL180, do any of you
that don’t have A/C *really* wish that you had it?
I’m early in the building of my IV-P and don’t want to put it in for several
reasons:
· Weight
· Potential structural issues
· Cost
· One more thing to break down the road
I live in Colorado and will be using this plane as a cross country traveler
with my wife, so comfort is certainly a factor but not at all costs. One
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 – 640hrs
IV-P – 10% done
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