Very expensive. Takes too highly skilled and experienced people
all day. I think this is routine every 3000 hours.
I suspect it happens more often than that.

This engine is 725 HP and weighs 400 pounds.
We have this engine beat on HP to weight ratio.

The TTC Mazda turbo rotary  is 650 HP and only weighs 250 pounds with Bell
47 gear box. It can be entirely rebuilt in less than a day by one person
if you sand
blast the rotors :-)

It remains to be seen what the rotary  life would be. The SiNi apex
seals are good
for 20,000 hours. Not 2000 hours..20,000 hours. Nobody has tried SiTi
side seals
yet to my knowledge.

The cost of the engine however is one tenth that of the PT6.

The current plans are to tow the TTC aircraft to cal city on Monday,
get the wings back on maybe Monday night or Tues morning
and then fly it Tues day or maybe wed day.

Paul Lamar

Oh I know how that is, I was a 68B, a turbine engine mechanic in the Army and I even had Depo level order Tear downs all the way to the number one bearing on the Lycoming turbines. I could even make matched sets of blades to replace all the blades in the compressor section.

I got my PT 6 sign off from the boys down in So cal. The Firm I work for in the Central Valley had 4 Turbine aircraft,  2 Beechcraft King Air's and 2 DE Haviland Otters, 1 -200 and 1-300.During the Summers we flew a lot, so many hours I would actually have to pull the PTMs and run them down to Turbo Power it's SoCal to have them do the inspections.

I only had time during the winter when I flying was slow to do the inspections myself.
It was incredibly expensive either way.

David Mikesell

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