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Date: Tue, 12 Sep 2006 14:55:16 -0400
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From: billhogarty <billhogarty@hughes.net>
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Subject: L-IV Air Condition
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I put relatively low cost air conditioning (< $2K) in my L-IV P using 
the stock TSIO 550 E1B engine sometime ago and it seems to work pretty 
good.   I would not recommend my unit for a retrofit but it was a pretty 
easy install before the fuselage top went on.

The key to my installation is using the TCM compressor bracket that 
mounts on the rear of the engine.  See page 09-05 in the engine parts 
manual.  This is the one expensive item.  TCM  asked $ 1400 but Lancair 
ordered it for me for $ 700.  Also, there is room to mount a backup 
alternator on the accessory case, but I had to move the battery from the 
firewall  to the  baggage compartment to make things fit.

I use a small Sanden A/C compressor with bulkhead fittings to route the 
freon hoses (#8 for pressure and # 10 for suction) thru the firewall and 
pressure bulkhead to the evaporator that is mounted in the rear of the 
fuselage under the inlet for the overhead airduct.  The cold air from 
the evaporator  is sent through the overhead duct into the  cabin using 
the six eyeball vents in the console for distribution. I left the 3 inch 
blower in the system to provide additional circulation when needed.

The only real compromise in this system is in the size of the condenser 
that dumps the heat from the freon as it expands. Here, larger is better 
but where to install???  I found a thin unit measuring 12x18x1inch and 
mounted it under the baggage floor where it just clears the gear legs 
when retracted  To increase efficiency, I routed external air thru the 
condenser from the NACA vent in the tail, using a 4 inch blower to cool 
the condenser.

My system is designed to provide A/C  only on the ground with the engine 
running .  I use an "either-or" control switch that selects 
Pressurization or Off or Air-Condition

Additional details available on request.

Regards, Bill Hogarty