Using the FAA registry: http://registry.faa.gov/aircraftinquiry/AcftRef_Inquiry.aspx
Total number of Cirrus are 4,600
Total number of Piper are 45,000
Given the age of the Piper fleet assume 25% are not flying that leaves about 34,000 assumed to be flying somewhat regularly.
All the Cirrus are new enough to be flying regularly.
NTSB for 2015:
18 Cirrus crashes, 5 fatal.
206 Piper crashes, 52 fatal.
The ratio holds for number flying, number crashing and number fatal. The Cirrus is no more crash-prone than any other aircraft…and the parachute reduces fatalities.
USFlyer wrote:
There are about 4,500 Pipers flying in the USA, 6,000 Cirrus.
USFlyer wrote:
Total number of Cirrus are 4,600
Total number of Piper are 45,000
So not only were the number of Pipers off by a factor of 10, but also you had about 30% too many Cirrus a/c?
USFlyer wrote:
Given the age of the Piper fleet assume 25% are not flying that leaves about 34,000 assumed to be flying somewhat regularly.
Even given this assumption, your original figure was off by a factor 7-8.
Actually the 6000 Cirrus SR2x was about right ;-) COPA used that number this year.
