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<< Lancair Builders' Mail List >>
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We are building a IVP (85% done) and I would like to
get an opinion from you guys out there, because every
IVP owner I have spoken to so far has given me a
different answer (what makes me think I will get a
clear answer here ?)
1. Does you IVP engine overheat ? Can you climb from
sea level to 29,000 feet in one go ? Or do you have to
level off a few times to make the temps go down ? The
reason I ask this is because we have bought a pair of
carbon gills from Gary Burns that would be installed
just under the turbos, and are supposed to eliminate
this problem. Furthermore this airplane would be used
in India where the hot outside temperature would
already not help much. I met Tony last week and he
told me to go ahead and install them because Everyone
out there had that problem, he has similar gills and
is just fine. The guys at Lancair claim that with the
fast-build engine option the bafflings they now make
are so good that this once-upon-a-time problem is now
eliminated. Can someone out there give me a clear
answer ? I would particularly like to hear from IV
pilots who live in hot/humid climates.
2. How about your cabin temps ? While taxiing I guess
you can leave your door cracked-open and let some
fresh air in that way. The fresh air that comes from
the back (empennage section) would work very little on
the ground as it works primarily on ram air
encountered in flight. But once in flight we would
normally pressurize the plane and therefore get air
that is heated by the turbos. Does the air intercooler
do a good job at lowering the temperature ? I saw a
IVP that had been installed with an air conditioner
and that makes me nervous. Some people I met at the
Salem airport that are now building their third IVP
have designed a clever system. Their cabin air is
passed through an intercooler in the baggage
compartment, and the ram air that comes from the
empennage is not brought into the cabin, but instead
only used to cool the intercooler. A fan pushes hot
cabin air into the intercoler, and that air is then
distributed through the overhead console. That way
they make use of empennage ram air even when they are
pressurized. A similar system could be devised where
the pilot throws in some ice cubes over those fins
(with adequate drainage) to provide for cool air even
while taxiing out. Again, as many comments are
welcome, especially from pilots in hot parts of the
world, and anyone whose memory goes as far back as
last summer.
Many thanks to all on this list for the daily
entertainment, regards, fili
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