Fuel Prices For The July Pilgrimage

Rich S. wrote:

I have since corrected the design deficiencies but I can't do anything about
the weather (no matter what ALgore says). One thing I can do is be very
careful as to when and where I burn mogas. I will not buy it from a source
which is unknown to me. This lets out every strange airport. I will not use
mogas on hot days nor at high altitudes.

Why is mogas from an unknown source worse than avgas from an unknown source?

Matt

"Matt Whiting" wrote in message
...

Why is mogas from an unknown source worse than avgas from an unknown
source?

Although I cannot cite a reference, it has always been my belief that Avgas
is subject to tighter inspection procedures from the refinery to the
customer. Also, I think that Mogas is blended more specifically for seasonal
use. If the FBO is not selling a large quantity (compared to the size of his
tank) you may get Mogas that is several months old. This means it could be
blended inappropriately for the season - or simply be just old gas with less
volatiles and/or water from condensation.

Rich S.

On May 24, 11:44 am, "Rich S."
wrote:


We left home and flew to Pullman in eastern Washington for the first fillup.
When we were passing 25 mi. north of Helena, MT, the engine quit - vapor
locked. Contributing factors were the high temperature (85 F @ 9500'), the
(I suspect) old mogas I bought in Pullman, and my fuel system design, having
the electric pump forward of the firewall and no forward-facing air scoops
on the tank vents.

What model of the plane is this?

"M" wrote in message
oups.com...

What model of the plane is this?

CP-323a Emeraude, although the fuel system was of my own design and
construction. I have added a blast tube to cool the electric fuel pump and
an air scoop on the vents to pressurize the fuel tanks.

http://temp.corvetteforum.net/c4/elwood89//harvey5.jpg

Rich S.

("Rich S." wrote)
CP-323a Emeraude, although the fuel system was of my own design and
construction. I have added a blast tube to cool the electric fuel pump and
an air scoop on the vents to pressurize the fuel tanks.

http://temp.corvetteforum.net/c4/elwood89//harvey5.jpg


Nice pic


Montblack

I have a Zenith CH-300 with an O-320. I had a similar problem in the
beginning. I did as you have done, plus insulated the fuel lines,
installed a small heat reflective shield over the gascolater, and ran
a blast tube down to the mechanical fuel pump. Since then (about 1990)
I have run over 9000 gallons of mogas through the machine with out
problem. Although I will always let the engine (and the fuel pump that
is bolted to the case) cool between flights. If I know that I will be
doing flights without allowing a cool down period, I will put 100LL in
one tank, and take off on it.







On Fri, 25 May 2007 09:02:46 -0700, "Rich S."
wrote:

"M" wrote in message
roups.com...

What model of the plane is this?

CP-323a Emeraude, although the fuel system was of my own design and
construction. I have added a blast tube to cool the electric fuel pump and
an air scoop on the vents to pressurize the fuel tanks.

http://temp.corvetteforum.net/c4/elwood89//harvey5.jpg

Rich S.



Zenith CH-300 Driver.