Preheating schemes?

James

That was called "dilution". There was a schedule for different
temperatures and it told you how much gas to put in oil prior to shut
down. It took about 30 minutes at cruise power to boil the gas out of
the oil next day. You could take off with diluted oil if you had oil
pressure in the green.

Oh the good ole days. Haven't thought about 'dilution' in years. Tnx
for bringing up )

Big John

On Wed, 12 Nov 2003 21:29:40 -0500 (EST), (James
Lloyd) wrote:

Years ago,we would put some gas into the oil right after shutdown and
that would keep it loose for quite a while and then just burn off when
running again.Jim

Yeah,I know what you mean John.Nowadays all we think about is what the
electronic box is telling us to do and you find less and less people to
ask info. from that have done it before.

Having read yesterdays post today, need to explain a little more.

There was a spring loaded switch in cockpit that controlled a valve
that let the gas go into the oil system. With engine running before
shut down you held this switch in on poisition for the number of
seconds that handbook told you to do for the expected temperature the
next day.

For example, 30 seconds for freezing, 60 seconds for 20 degrees, etc
(these are just examples not real life figures).

After putting the gas in oil, you had to run engine for a few minutes
so would mix and then thined oil get to all parts of engine.

Way I wrote, sound like you opened the oil cap and poured gas in prior
to shut down G No, no, no.

Big John


On Wed, 12 Nov 2003 23:52:36 -0600, Big John
wrote:

James

That was called "dilution". There was a schedule for different
temperatures and it told you how much gas to put in oil prior to shut
down. It took about 30 minutes at cruise power to boil the gas out of
the oil next day. You could take off with diluted oil if you had oil
pressure in the green.

Oh the good ole days. Haven't thought about 'dilution' in years. Tnx
for bringing up )

Big John

On Wed, 12 Nov 2003 21:29:40 -0500 (EST), (James
Lloyd) wrote:

Years ago,we would put some gas into the oil right after shutdown and
that would keep it loose for quite a while and then just burn off when
running again.Jim

Sorry John,I forgot to say that we ran the eng. after adding the gas.Jim