Cessna Anticipates AvGas Demise

Bertie the Bunyip wrote:

This is what happens

BS. This is what happens when you don't follow the POH.

On Oct 6, 6:03 pm, Larry Dighera wrote:
On Sun, 07 Oct 2007 00:47:45 +0200, Stefan
wrote in :

It's fully FADEC controlled, so no overheating possible.

Except in the case of a leak in the coolant system.

In addition to the cooling system, the gearing adds weight,
complexity, and additional failure points, not to mention the
necessity for electric power for the FADEC system.

Don't get me wrong; it may be far superior to the IO-360 with regard
to fuel efficiency and performance at altitude due to the turbo, but I
think we'll have to monitor the use of this engine, and see how it
performs in service over time before drawing any hard and fast
conclusions.

If you go to their website and click on Service Bulletins,
you'll see a long list of things they've already had to deal with.
Probably normal for a radically new engine, but it does make one a bit
nervous about reliability.
http://www.centurion-engines.com/

Textron, who owns both Cessna and Lycoming, has given Cessna
clearance to go shopping for other engines. The Lycoming crankshaft
circus has inflamed tempers enough that even the parent company is fed
up. So now the new Cessna LSA will have the Continental O-200 (yuck)
and the 172 will try the Thielert. Lycoming had better either hope
that the Thielert is a bomb or else get their crankshaft act
together.
Seems to me that I heard that Superior was going to produce
Lyc cranks under PMA rules. I hope they make them better than their
cylinders: http://rgl.faa.gov/Regulatory_and_Gu...4?OpenDocument

Dan

Stefan wrote in news:46484$47082ac5$d9a271ba
:

Bertie the Bunyip wrote:

This is what happens

BS. This is what happens when you don't follow the POH.


Not BS, and you snipped the question.

Waht happens when battery power is taken from the fadec?


This is what happens.


Bertie

Matt Whiting wrote:

It's fully FADEC controlled, so no overheating possible.

Automobile engines have been digitally controlled for two decades and
they still can overheat.

Yes, but they don't overheat because somebody set the wrong combination of
three different knobs.

Dan_Thomas_ wrote

Seems to me that I heard that Superior was going to produce
Lyc cranks under PMA rules. I hope they make them better than their
cylinders:
http://rgl.faa.gov/Regulatory_and_Gu...4?OpenDocument

Seems as though I remember that they are offering to replace them on
Superior's dime, unlike Lyc, though.
--
Jim in NC

There's no TBO. They call it a TBR, where the whole engine is
replaced with a new one. I can't put my finger on the time but I think
it's around 2400 hours.


Ain't that great? Power by the hour. You know in advance what it will
cost you to run that engine 2400 hours. No surprise midtime overhauls.
If it doesn't make TBR, Thielert will prorate it on the new engine.

--
Thomas Borchert (EDDH)

Matt,

It's liquid cooled, so no discussion about shock cooling anymore.

So we prevent a problem that isn't really a problem.


No. Read carefully. We prevent DISCUSSION about a problem that isn't a
problem ;-)


It's geared, so a prop strike doesn't affect the engine.

The engine still stops suddenly unless the gearbox fails or is
designed
to fail before any significant acceleration is transferred to the
engine.

There is no direct mechanical connection between the engine and the
prop, as I understand it. Same goes for the Rotax 912/914 series.

Thielert's website is in English... ;-)

--
Thomas Borchert (EDDH)

Matt,

so with Lycs and Contis
lasting 2,000 hours fairly routinely,

If only! They mostly don't, as we all know. Think midtime top overhauls.
Think crankshaft ADs.

the Thielert needs to at least
double that ... unless the replacement cost is equivalent to an overhaul
of a Lyc or Conti.

It's in the same ballpark with 2400 TBR.

--
Thomas Borchert (EDDH)

Larry,

What powers the FADEC in the event of an electrical system failure?


A battery. Yes, in the case of the DA-42, this was implemented lousily,
as someone found out the hard way when he didn't follow the POH. The
system is being changed to prevent fools from...
Other installations are different.

In case you worry about this "single point of failure", your Lyc or
Continental has tons of them, too.

--
Thomas Borchert (EDDH)

Thomas Borchert wrote in
:

Larry,

What powers the FADEC in the event of an electrical system failure?


A battery. Yes, in the case of the DA-42, this was implemented lousily,
as someone found out the hard way when he didn't follow the POH. The
system is being changed to prevent fools from...
Other installations are different.

In case you worry about this "single point of failure", your Lyc or
Continental has tons of them, too.


But not invovling electricity.

Any airplane I've flown that has Fadec has some sort of manual reversion.


Bertie