it has always run on mineral oil. A mechanic suggested that I
switch to an AD oil. This has always been a no no. Any thoughts?
--- In fairchildclub@yahoogroups.com, Michael Denest
wrote:
'> One thing Mark did not mention is the oil type. We
> believe that 60 wt. (120 Grade) mineral is the best
> break-in oil to use. Run it for at least 25 hours or
> until the oil consumption goes down then drain it,
> check the screens and switch to 50 or 60 wt. AD
> (depending on climate). Works every time. 60 years
> ago, the only oil available was mineral and these
> engines were designed around that factor.
>
> Mike Denest
>
> --- mdaero1941@a... wrote:
>
> > Hey Bob, same here. What we have done in the past up
> > here is this. First we
> > adjust fuel and oil pressure. We like to see about
> > 60-65 lbs. on the oil. It
> > usually goes down about 5 lbs. after the first hour.
> > After about 10 hours we
> > will go back and adjust it to 55 lbs. We will do a
> > mag check at 1500 rpm also,
> > then shut down and cool off. Later on we'll go back
> > and run it up more time to
> > check things out, then fly. We only run it up for
> > about 10 to 15 minutes on the
> > ground. I'll do a shallow climb out to about 5,000
> > ft. (nice cool temp in
> > summer) then alternate the rpm from 2250 to 2300 for
> > ten minutes, then down to
> > 2100 for five minutes. Do this till the oil
> > consumption stabilizes. We have been
> > getting less then a quart to a quart and a half an
> > hour by this method. We
> > have been getting a few calls lately about
> > rebuilding Rangers, Dad just finished
> > his 51st rebuild for a fellow in Florida, and now we
> > have one that needs a
> > top overhaul that will go on a PT-26 in Illinois.
> > Anyway, it's been a good
> > discussion - hope things are nice in FL., it's about
> > 10 degrees here.
> >
> > Mark Denest
> >
> >
> > [Non-text portions of this message have been
> > removed]
> >
> >
>
>
>
>
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