REFLECTOR:Exhuast systems

[Jim Agnew]

No, it is just a light gray haze and covers about 4-5" of
the back of the blades.  It could occur during high power
rich mixture during takeoff and landing.  The prop is not
stained, it is surface dust.

Jim

--- John Dibble <aminetech@dixie-net.com> wrote:
> Do the prop stains indicate inadequate mixture leaning?
> 
> John
> 
> Jim Agnew wrote:
> 
> > Scott,
> >
> > Without slip joints you will almost always get cracking
> > because each cylinder is expanding at a different rate
> due
> > to uneven heating.  As far as no stains on the prop, I
> have
> > two to one on my IO-360 rear facing except that the
> rear
> > end of the pipe has a 90 degree elbow which has been
> milled
> > off flush with the bottom of the pipe leaving a large
> oval
> > hole with a tip down end.  This mixes the exhaust with
> the
> > air passing around the fairing and turns it down
> slightly.
> > At most after several hours I get a slight haze on the
> prop
> > that just wipes off.  I can send you a picture directly
> if
> > you like.
> >
> > Jim
> >
> 
> 
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=====
James F. Agnew
Jim_Agnew_2@Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed