new twin concept from Cirrus

Thomas Borchert wrote:

It was my (mis?)understanding that a diesel is, HP/lb, heavier than a
standard aircraft engine, especially when getting into the higher
(over 250) HP models. Correct?

Not necessarily, but the big Thielert at 350 HP is heavier than an
IO-520/550. 60 pounds or so.

On the other hand, the diesel airplane will typically require less fuel in
order to complete the same mission as the avgas airplane. The saved fuel
weight can offset some or all of the weight penalty of the heavier engine.

Of course this does not apply when topping off the tanks - but in that
case, the diesel airplane gains a lot in range.

So it looks like there is a free lunch after all - at least when not
counting the acquisition costs! :-)


Greetings,
Markus

("Thomas Borchert" wrote)
I may have reported this here already, but I live in Hamburg, Germany,
home of the Thielert group. And at the Hamburg airport, I have seen what
seemed to be a prototype of an SR-22 fitted with the big 350-HP Thielert.


Clipboard and a white lab coat are all you'll need. Go poke around and
report back.

Thanks. :-)


Montblack
In this country we call it pulling a "Rockford".
http://www.timstvshowcase.com/rockford.html

Markus,

On the other hand, the diesel airplane will typically require less fuel in
order to complete the same mission as the avgas airplane.


Yes, but fuel is not usually stored at the very front end of the plane (think
CG).

--
Thomas Borchert (EDDH)

Montblack,

Clipboard and a white lab coat are all you'll need. Go poke around and
report back.


I was more vague than I could have been because I have been asked to...

--
Thomas Borchert (EDDH)

("Thomas Borchert" wrote)
I was more vague than I could have been because I have been asked to...


http://www.snowcrest.net/donnelly/piglatin.html
"isthay ouldshay orkway" :-)


Ontblackmay

Matt B. wrote:

There's a significant difference between tubronormalizing and
turbosupercharging and evidently that's what Cirrus is going after.

I don't think the turbo mod was from Cirrus, it was aftermarket. Other
than limiting boost to produce a maximum manifold pressure of X
(turbonormalized engine), what other significant differences are there
between the two systems?