Gasohol

On Jun 3, 10:50 pm, nrp wrote:
an easy way to have a line freeze and turn the plane into a glider.

Then why don't cars have line freezing trouble with E-10 gas? Here in
Minnesota, gas line freezeups have essentially disappeared because of
the mandated E-10. It is the only good thing about gasahpol
though...........

I think a major reason not to use E-10 in certificated aircraft is the
~5% power reduction.

Alcohol is an emulsifier that keeps water mixed with gasoline. It is
also an antifreeze that supresses the freezing temperature of water.
If you have a car that has ice in the fuel line, adding alcohol will
melt
it.

--

FF

On Fri, 22 Jun 2007 18:46:05 -0700, wrote:

On Jun 3, 10:50 pm, nrp wrote:
an easy way to have a line freeze and turn the plane into a glider.

Then why don't cars have line freezing trouble with E-10 gas? Here in
Minnesota, gas line freezeups have essentially disappeared because of
the mandated E-10. It is the only good thing about gasahpol
though...........

I think a major reason not to use E-10 in certificated aircraft is the
~5% power reduction.

Alcohol is an emulsifier that keeps water mixed with gasoline. It is
also an antifreeze that supresses the freezing temperature of water.
If you have a car that has ice in the fuel line, adding alcohol will
melt
it.
And adding a bit more water makes the water and alky drop out od
suspension. Called Phase Separation. It's temperature sensitive, so in
a plane at ground level you may still have gasahol, but at 4000 feet,
you are about 16 degrees F. colder - and that may be enough to trip
the phase separation. Bad Ju-Ju when the engine gets a gulp of watered
down hooch when it's expecting gasoline.

On 2 stroke engines (ultralights, snowmobiles etc) when this happens
the engine not only looses fuel, but it looses lubrication too,
because the separated hooch has no oil in it. It's at the bottom of
the tank, where the pickup is, so pistons are often destroyed before
the driver/pilot even knows he has a problem.

--
Posted via a free Usenet account from http://www.teranews.com

On Jun 23, 3:12 am, clare at snyder.on.ca wrote:
On Fri, 22 Jun 2007 18:46:05 -0700, wrote:
On Jun 3, 10:50 pm, nrp wrote:
an easy way to have a line freeze and turn the plane into a glider.

Then why don't cars have line freezing trouble with E-10 gas? Here in
Minnesota, gas line freezeups have essentially disappeared because of
the mandated E-10. It is the only good thing about gasahpol
though...........

I think a major reason not to use E-10 in certificated aircraft is the
~5% power reduction.

Alcohol is an emulsifier that keeps water mixed with gasoline. It is
also an antifreeze that supresses the freezing temperature of water.
If you have a car that has ice in the fuel line, adding alcohol will
melt
it.

And adding a bit more water makes the water and alky drop out od
suspension. Called Phase Separation. It's temperature sensitive, so in
a plane at ground level you may still have gasahol, but at 4000 feet,
you are about 16 degrees F. colder - and that may be enough to trip
the phase separation. Bad Ju-Ju when the engine gets a gulp of watered
down hooch when it's expecting gasoline.

On 2 stroke engines (ultralights, snowmobiles etc) when this happens
the engine not only looses fuel, but it looses lubrication too,
because the separated hooch has no oil in it. It's at the bottom of
the tank, where the pickup is, so pistons are often destroyed before
the driver/pilot even knows he has a problem.


The alcohol will also produce a greater temperature drop in
when it evaporates in the carburetor, increasing the danger
of carb ice, something that is seldom a problem in cars,
especially those with fuel injection....

--

FF

wrote:
On Jun 3, 10:50 pm, nrp wrote:
an easy way to have a line freeze and turn the plane into a glider.
Then why don't cars have line freezing trouble with E-10 gas? Here in
Minnesota, gas line freezeups have essentially disappeared because of
the mandated E-10. It is the only good thing about gasahpol
though...........

I think a major reason not to use E-10 in certificated aircraft is the
~5% power reduction.


I think ethanol in gasoline is a stupid waste of agricultural resources,
but if you are the typical GA pilot an you're computing your safety
margins out close enough that 5% makes a difference, you're likely to be
removed from the gene pool before long anyway.