.....FYI---

Anyone looking at this should be very carefull drawing conclusions.
The main piece of data missing is the total number of hours flown in
each make....without this a "fair" comparison can't be made...this is
basic statistics...can't calculate a batting average without knowing
how many times a player has been at bat...The NTSB website
"normalizes" accident data with hours flown(actually, accidents per x
number of hours). In simple terms..the denominator is missing....this
is a raw count of accidents...

...my 2 cents...have a little practice crunching these kinds of
statistics..
Rich


wrote in message ...
This is according to the NTSB database and reflects helicopter crashes
between 1/1/1999 and 5/11/2004 for the helicopter models mentioned
only.

Helicopter Total Accidents Total Fatal Percent Fatal
=========== ================ =========== =============
Mini 500 7 2 28%
Robinson R22 178 30 17%
Brantly B2B 7 1 14%
Rotorway 48 2 4%
Safari 0 0 --
================================================== =======

Note that there are huge numbers of R22s and Rotorway helicopters out
there which account for the larger number of accidents. Not
surprising was the relatively few crashes of Mini500s, Brantlys and
Safaris because these helicopters are rare by comparison. There were
no reported crashes of Safari helicopters during that period and there
was only one prior to 1999. The Rotorway category also includes
Scorpion helicopters.

What this table shows is the percentage of fatalies to the total
number of crashes. From this data, we can conclude that if one is in
a crash, its better to be in a Rotorway. Although there is not enough
data to conclude this, it looks like the Safari may be better at not
having accidents in the first place.

There are two pieces of data that would be nice to have and those are
the mean number of hours between accidents and the mean number of
hours between fatalities. If anybody has this, please post it.