Stuart and Sammy are pretty much on-target there, Doug.

This is slightly off-topic for r.a.i, so I'll try to be brief.
I don't know where you post from, so I hope U.S. cost figures
are what you are asking for.
I wouldn't even try to guess costs for other parts of the world.

The three big fixed-cost items of Annual Inspection, Insurance,
and Heated Hangar will each exceed US$5000 per year.
Unheated hangars might be less, but my personal opinion is that
heated hangars pay for themselves by reduced maintenance costs,
at least in a climate like Ohio, where I live.

I've had annuals cost less, but I've had one cost US$20,000, too.
That one had a lot of labor to replace the leaking bellows seals
on the gear-actuating rods, where they penetrate the pressure vessel,
and at the same time to comply with a costly A.D. regarding fuel-line
chafing in the difficult-to-reach areas behind the firewalls.

Reserve for engines is about US$100 per hour.
Probably that is higher than you expect, but mainly because the
cylinders of the big-bore Continental engines rarely make TBO.
Expect new cylinders or a top overhaul on mid-time TSIO520s.

The exhaust system gets lots of stress from temperature and pressure.
It glows brightly at night, and passengers notice the light.
Inconel exhaust parts are available from the collectors back to
the turbocharger, and I've been gradually switching from the original
stainless steel to inconel each time I replace a piece.

All in, hourly costs will be triple or quadruple your fuel cost,
depending on how many hours per year you fly to spread the fixed costs.
But you can guess that the 340 has to be a sweet airplane,
or I wouldn't have held on to mine for more than twenty years.
When the brokers call to buy it from me, I always tell them that
if I sold my 340, I'd have to go out buy another one just like it!

FWIW, the 340's good looks stem from the fact that it was one of
the few Cessna twins to reach production the way the appearance
designers first drew it. The aerodynamics people didn't need to
bugger up its clean lines to make it fly right.
---JRC---

"Doug" wrote in message =
om...
What sort of cost is there in owning and running a Cessna 340?
=20