In article Darryl Ramm writes:

Why would you cap a DG-1000 at a 3,000 hour life? There are already
published 3000, 6000, 9000 (and every 1000 hours) inspections for the
DG-1000. There are many high time ASK-21 around well beyond 3,000
hours. Many well used and patched up but still bright and shiny and
modern looking.

My bad. I was way too asleep when I wrote that.

I found later that the service life of the ask-21 is 18,000 hours,
apparently with similar inspections, where the DG claims 12,000 per
another poster. In either case, the cost for that does go way down.


OTOH the price quoted did was too low. No trailer, instruments, other
options, etc. and I'm not sure a linear depreciation is the right
model.


Indeed, all true. I had forgotten about trailer/instruments/etc.,
stupidly assuming they were included. Linear depreciation is most
likely wrong, too, though lots of cost/hour operation calculations
seem to use i.

I should have included insurance costs and other costs that are
calculated into operating cost. For aircraft used for clubs and
training, I would expect this to be a big item, and the order of
magnitude higher price of the glider would have a large effect on
the price of the annual insurance bill.


But, I blew it big on the 3000 hours.

Alan