Michael,
How “many more pistons” (your
quote from below)???
My data (see prior post) shows
approx 8:1 ratio of IV’s&IVP’s to IVP-T’s. (I’m
sure there are some errors in my data – but at least it’s an honest
attempt, and the error can go either way. In fact, my data probably misses
some IV’s that have been converted to IV-T’s and never updated in
the FAA registry. This roughly mirrors the accident ratio from Jeff 31:4
You can perceive/claim the IV’s have
been flying longer, but the magnitude of the number of aircraft certified by
year doesn’t really support that either (since over 80% of the IV’s
flying are from the same period as the IVP-T’s). It’s true there
are some old IV’s from the 90’s (< 50), but the bulk of the flying
IV-P fleet (>200) is <5 years old. Overall, the age/hours/miles perception/argument
is approximately a wash.
Furthermore, one might guess that given
the investment and expense (insurance) that the turbines are flying more miles (on
average) due to speed and mission profile, and it’s just to $ to let them
sit. (I’ll admit no data/research here – just logical
inference).
Overall, this data tends to indicate your
perceptions/statements are not accurate. My data may be wrong and hence
the conclusions wrong – I’m very open to correction from anyone
with access to better data, but it is based on the data/facts as available.
The Wright’s legacy is doing the research
and the math - otherwise it’s really only a hypothesis, not a conclusion/fact
(not something to risk your life with)!!!
Rick Titsworth
Cell: 313-506-5604
p.s. The “apparent” overall accident
rate, approx 2% per year (1:50 ???) should be a wakeup call to those of us (like
me) who probably don’t get enough meaningful re-current training and/or
are taking too many risks. (Someone please check all my math on this).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
From post on 11/15/2006:
Not to overstate the obvious there are so many more piston IVs flying that the normalized accident rate of turbines is so
much higher, and that piston IVs have been flying for so many more years.
Michael Smith
As of 8 June 2006 there were 4 IVP turbine
accidents reported/ 25 IV accidents and 6 straight IV accidents. I know because
I keep a set of books on this and brief the Lancair group every year at OSH on this.