G1000 Check out

Thomas Borchert wrote:
Jose,

Is the fuel lighter, or does it use less fuel per mile or per hour (for
the same power)?


Diesel has more energy per weight than Avgas. And the modern diesel
engines use less fuel for the same power. Much less. But the engines, at
least the ones certificated, are not lighter. Some are heavier than
comparable Avgas engines.


The thermal energy per weight unit is roughly the same for
all hydro-carbon liquids, AVGAS and JET-A1 (used by aviation
diesels) included.

What makes for the better fuel economy of a Diesel engine (compared
to the gasoline engine Otto process) is from two sources:

- the greater compression ratio makes an ideal thermal
engine (Carnot process) work with better efficiency,

- the long combustion in a Diesel engine makes the process
approximate the ideal process better (constant pressure).

--

Tauno Voipio
tauno voipio (at) iki fi

Jim Macklin wrote:
Maybe, but you have to live near where I'll live. You also
have to be an NRA Life member for at least 5 years.

NRA ten plus, but I think I didn't pay my last due. Have plenty of
toys that go Bang! :^)

The Monk

"Thomas Borchert" wrote

And the modern diesel
engines use less fuel for the same power. Much less. But the engines, at
least the ones certificated, are not lighter. Some are heavier than
comparable Avgas engines.

It can be argued that an aviation diesel can be much smaller than an
aviation gas engine, displacement wise, and still perform the same. The
superior torque of a diesel, plus the longer duration of the power stroke
just seems to turn a prop better. Thus, you can come closer with the weight
comparison.
--
Jim in NC

I would certainly think so. However, I wasn't consulted. I assume it
came down to money.

Life member since 1968, don't have to pay every year that
way. Bought my boys and wife life memberships too. Don't
have many toys today, will buy that Legend Cub someday. The
odds of winning the lottery are about 160 million to 1, damn
near a sure thing.

Can't afford the new AOPA life member option until I win
that lottery, but I am also EAA Life with a fairly low
number.


--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"Flyingmonk" wrote in message
ups.com...
| Jim Macklin wrote:
| Maybe, but you have to live near where I'll live. You
also
| have to be an NRA Life member for at least 5 years.
|
| NRA ten plus, but I think I didn't pay my last due. Have
plenty of
| toys that go Bang! :^)
|
| The Monk
|

but I am also EAA Life with a fairly low
number.

What was that? You're an EAA low life?

Jose
--
You can choose whom to befriend, but you cannot choose whom to love.
for Email, make the obvious change in the address.