MoGas Long Term Test: 5000 gallons and counting...

In article ,
"karel" wrote:

Was mainly the ROP & LOP that worried me,
perfectly clear now!

Still in all seriousness: shouldn't there be a little
glossary somewhere,

Hey, there is a glossary somewhere. It's called www.acronymfinder.com.
Go there and type in ROP, for example, and you'll find the aviation
related definition right there at number 19 in the list.

"karel" wrote in message
...

Still in all seriousness: shouldn't there be a little
glossary somewhere, perhaps in Ron W's FAQ list?
I've a feeling I'm not the only one lost on terminology.


I've seen a book of aviation acronyms and it's several hundred pages. It's
just a part of techical terminology.

Hang around and read as much as you can and you'll discover their terms as
well as their meanings and substance.

Don't feel alone... I didn't know what exactly TSO was until I bought my
first airplane. :~)

KA (learning & learning & ....)

Hang in there!!

"Gene Kearns" wrote in message
...
On Tue, 10 May 2005 18:57:25 -0000, "karel"
wrote:


Still in all seriousness: shouldn't there be a little
glossary somewhere, perhaps in Ron W's FAQ list?
I've a feeling I'm not the only one lost on terminology.


What's a FAQ?........... ;-)

BTSOOM!

writes:

: The autogas STC is undoubtedly the best thing that has ever happened to
: aircraft owners. If you've got the STC, but aren't using it, you are
: literally flushing thousands of dollars down the toilet.

I'd love to get the STC for my Skylane, but I'm told that all gas sold
in California these days has alcohol in it, so I'm S.O.L.

-jav

On Tue, 10 May 2005 20:43:34 +0000 (UTC),
wrote:

Exactly. The absolute value of EGT does not matter... almost all of the
cooling of the exhaust valves is done through the valve seat (and stem in Lycoming).
Thus, the "cold sink" is the cylinder, and CHT is what's important. Lycoming redlines
CHT at 500, recommends 450 as a max, and general wisedom dictates anything under
375-400 in cruise is fine.

Deakin posts a chart from Pratt and Whitney in his "Mixture Magic"
column which verifies this precisely. In the chart is a line
depicting the loss of strength of the aluminum alloy used for cylinder
heads. It starts dipping LONG before 400 degrees is reached and is
plummeting at 450 degrees.

See: http://www.avweb.com/news/columns/182084-1.html

He recommends running at 400 degrees or under for cruise.

Corky Scott

"Javier Henderson" wrote in message
...
writes:

: The autogas STC is undoubtedly the best thing that has ever happened
to
: aircraft owners. If you've got the STC, but aren't using it, you are
: literally flushing thousands of dollars down the toilet.

I'd love to get the STC for my Skylane, but I'm told that all gas sold
in California these days has alcohol in it, so I'm S.O.L.

-jav

You should be able to find airports that carry mogas that meets the STC
requirements.

: Deakin posts a chart from Pratt and Whitney in his "Mixture Magic"
: column which verifies this precisely. In the chart is a line
: depicting the loss of strength of the aluminum alloy used for cylinder
: heads. It starts dipping LONG before 400 degrees is reached and is
: plummeting at 450 degrees.

: See: http://www.avweb.com/news/columns/182084-1.html

: He recommends running at 400 degrees or under for cruise.

I knew I'd read it somewhere and suspected it was a Deakin article.

-Cory

************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************

We can find airports that carry mogas that meet the STC requirements with no
problems. Unfortunately, none of them are in California. The closest one
to me is just east of Salt Lake. Die Governator has decreed that all
gasoline shall be contaminated with 5.5% alcohol before it leaves the
refinery. He didn't make any exceptions for old farm vehicles, lawnmowers,
weedwhackers, or aircraft -- all of which to one degree or another get
honked up with alcohol.

The one thing that keeps burning in the back of my head is that they
probably soaked some of these carb seals in pure alcohol for six months and
said, "look, they swell up" and thus forbade gasahol. My sense, and it is
only a gut feeling, is that if you ran your airplane for a couple of days on
gasahol then let it sit for a couple of weeks in 100LL that you wouldn't see
any deterioration at all. However, you are in direct violation of the STC
if you do so.

It might be nice to have EAA and/or Petersen do the same seal test with 1%
gasahol, 2% gasahol and so on over a short, moderate, and long time to see
the exact problems facing us. Whether we like it or not, gasahol is with us
to stay, at least in California.

Jim


"Dave Stadt" wrote in message
. ..

You should be able to find airports that carry mogas that meets the STC
requirements.

The Governor of MN just signed us up for 20% alcohol over the next few
years. Soon we'll be able to drink the stuff......

There is a range and max power output penalty for use of alcohol since
it has only about half the energy density of pure hydrocarbon fuel.

: He recommends running at 400 degrees or under for cruise.

I knew I'd read it somewhere and suspected it was a Deakin article.

Actually, Lycoming says this, too. (It's on their website.)
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"