Message-ID: <00b601c1d2e4$d928f100$f70c4094@oemcomputer>
From: "Tom Hall" <tomhall@starband.net>
To: <lancair.list@olsusa.com>
Subject: Turbine Lancair IVPT
Date: Sat, 23 Mar 2002 22:34:35 -0500
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The Lancair Newsletter Vol. 16, issue No. 2, contains a more precise and
considered evaluation of range, speed and fuel consumption than the one in
Private Pilot. At max. allowable ITT and 24,000, speed should be more on the
order of 330 kts and burn of 36GPH.  Max range is obtained at the more
sedate 295Kts economy power setting and fuel burn drops to 28 GPH at 24,000.
Even at this setting, max VFR range is probably less than 1000NM although at
econo cruise, range may reach 850NM with reserves.

I agree that $220k is not reasonably attainable, but $250k may be doable.
The fast build Turbine kit is actually $110.4 k. The prop is more in the
range of 13.5-14.5k, unless you opt for the Hartzell, which is 25k. A 601-D
Walter can be had with new IRAN for $32.5k. While i'm sure that you can
spend 10k for an interior, I believe that a diligent buyer can cut that in
half. Paint also should be well less than 10k. Obviously one can spend 30k
or 300k for avionics and such. Naturally, fast build doors and builder's
assist weeks also add $.

Bleed air for pressurization and heat is no problem, BUT it does come at the
cost of some reduction in efficiency. The factory a/c just installed
pressure bulkheads in late fall.

The fuel capacity is 125 gal. and is gained by a sump beneath the fuel
valve.

I had concerns of fuel vs range and that was my main interest during test
flight. Even at low altitude (12,000), the power can be reduced to a burn of
32 GPH and still see a TAS in excess of 250Kts.

Takeoff stabilized at 200kts and ROC of 3800-4000FPM. With regard to
decents, at 4000 FPM, it doesn't take long to get from 10,000 to the ground
and still stay below 200kts. As you indicate, ATC can cause delays in climb,
but with power reduced and  still 200+ kts and fuel burn 30 GPH or less, you
can get out of most airspace in no time. Better yet, avoid or go over.
Naturally, if you are going over 18,000, you have to play with the system,
but cross country, that's usually not a problem.

There are no perfect aircraft. Some are fast. Some have great range and low
fuel consumption. Some are great short field. All are compromises. After my
trip to Redmond, I decided that I could live with 300kts and a 700-800 mile
IFR range. OK, I may have to stop for fuel on a 1000 NM trip going west. My
current a/c has 8hours of fuel and i usually do that anyway, even though it
may not be necessary. IVP pistons are great aircraft too.
Ya pays ya money and ya takes ya chances.

Tom Hall

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