Finally: The right-sized Thielert

On Wed, 17 May 2006 17:42:17 -0700, "BTIZ"
wrote:

Jet A is more expensive out our local pumps than 100LL but about 80cents.
BT

How much is home heating oil?

Don

"BTIZ" wrote in message
news:JpPag.1293$rS6.170@fed1read11...
Jet A is more expensive out our local pumps than 100LL but about 80cents.
BT

Fairly common in areas where the "jet-setters" congregate, like Jackson
Hole, Squaw Valley, Aspen...

On 17-May-2006, "soxinbox" wrote:

I wonder whether its constant speed or constant pitch. I also wonder how
much useful load it eats up.


I believe that the Thielert engines tend to be a bit lighter than gasoline
engines of comparable power. Useful load probably won't change that much
but PAYLOAD should get a nice bump up because the diesel's lower SFC means
less fuel will be needed for a given mission, even taking into account that
diesel fuel (which is essentially the same as Jet-A) is slightly heavier (in
lbs/gal) than gasoline.

I strongly suspect that any modern piston aircraft engine over 200 hp will
be configurable for a constant speed prop. However, FADEC might take
control of RPMs out of the pilot's hands


-Elliott Drucker

wrote:
Useful load probably won't change that much
but PAYLOAD should get a nice bump up because the diesel's lower SFC means
less fuel will be needed for a given mission, even taking into account that
diesel fuel (which is essentially the same as Jet-A) is slightly heavier (in
lbs/gal) than gasoline.

Actually in this discussion, the density of the jet fuel isn't a factor
because BSFC is based on weight, not volume. Diesel engine has a lower
BSFC means it needs less weight of the fuel to produce the same amount
of power.

Soxinbox,

I wonder whether its constant speed or constant pitch.


Speed. But you as a pilot don't get to select it. There's just one
single lever for "noise control": Forward means more noise, pull back
and it gets quieter. That lever doesn't even have any mechanical
connection to the engine, only an electrical link to the engine control
units.

Oh, and the reaction to this information says a lot about how much a
pilot really wants innovation in aviation.

--
Thomas Borchert (EDDH)

"Ronnie" writes:

I thought the fuel for these aviation diesel engine
was Jet A. Is the data below for Jet A or for
diesel fuel?

How does Jet A compare to gasoline?


Jet A == kerosene.

Gasoline is 6.25 lbs/gallon {at ~70F}
Kero is 6.84 lbs/gallon...

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& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
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"Thomas Borchert" wrote in message
...

Oh, and the reaction to this information says a lot about how much a
pilot really wants innovation in aviation.

--
Thomas Borchert (EDDH)

Nope. It says how much a pilot wants to trust a small computer and its
software and engine actuators.
John Severyn @KLVK

J.,

It says how much a pilot wants to trust a small computer and its
software and engine actuators.


instead of a small mechanical linkage and its hardware?

--
Thomas Borchert (EDDH)

In article ,
Thomas Borchert wrote:

It says how much a pilot wants to trust a small computer and its
software and engine actuators.

instead of a small mechanical linkage and its hardware?

Hardware failure modes are much better understood.

What's the reliability of software?

--
Bob Noel
Looking for a sig the
lawyers will hate

Bob,

Hardware failure modes are much better understood.

Says who? Numbers, please.

What's the reliability of software?

Not sure I understand the question.

--
Thomas Borchert (EDDH)