100 LL Replacement?

[Dave[_5_]]

I came across an interesting set of slides that go into considerable
technical detail about the problems of coming up with a replacement
for 100LL. The conclusion: Avgas 91/96UL (Unleaded), as apparently now
available in Sweden. Check it out: http://www.iaopa.org/info/assembly21/hjelmberg_files/frame.htm

David Johnson

[Jay Honeck]

> I came across an interesting set of slides that go into considerable
> technical detail about the problems of coming up with a replacement
> for 100LL. The conclusion: Avgas 91/96UL (Unleaded), as apparently now
> available in Sweden. Check it out:http://www.iaopa.org/info/assembly21/hjelmberg_files/frame.htm

We have used unleaded regular car gas in our plane(s) since 1998.
Since 2002 we've run over 9000 gallons, without a hiccup. The price
difference between mogas and avgas has paid for our fuel truck, the
tank, and most of my next engine overhaul. Best of all, the plane
runs *better* on it.

Of course, you need a low(er) compression engine to use mogas, which
does present a problem for many aircraft owners. High compression,
fuel injected engines generally need the higher-octane stuff -- so
perhaps this "Swedish blend" will help owners of those aircraft out?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

[Morgans[_2_]]

"Jay Honeck" > wrote

> Of course, you need a low(er) compression engine to use mogas, which
> does present a problem for many aircraft owners. High compression,
> fuel injected engines generally need the higher-octane stuff -- so
> perhaps this "Swedish blend" will help owners of those aircraft out?
You must not have suffered through the whole of the slides, or didn't get
the "catch."

In order for the turbocharged high HP engines to use even the 91/96, they
need to install a "Prisim" type management system to keep the spark knock
and detonation from taking the engine apart, piece by piece.

They did say that would work even in worst case situations, and would pay
for the changes, in cheaper fuel costs.
--
Jim in NC