REFLECTOR:Exhuast systems

[Jim Agnew]

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

--- Milton Mersky <miltonm@airmail.net> wrote:
> 
> Scott:
> 
> If you use slip joints, can you replace just parts or do
> you have to 
> replace the entire stack.?
> 
> If just parts are to be replaced, go that way.
> 
> Milt
> 
> 
> 
> Scott Derrick wrote:
> 
> > I just got off the phone with Brendan at the factory
> and he certainly 
> > makes the forward facing system sound like a good
> choice. No exhaust 
> > stains on the prop...
> >
> > But the Custom Aircraft system is so well designed with
> each port a 
> > spring captured slip joint..  One year warrantee...
> >
> > Decisions decisions..
> >
> > Scott
> >
> > Scott Derrick wrote:
> >
> >> The V Factory has rearward facing stacks for the IO360
> for $400
> >>
> >> Custom Aircraft parts(known for their excellent work)
> has them for 
> >> $615.  They offer 3 or 4 variants with different
> dimensions to fit 
> >> your cowling, etc..
> >>
> >> I don't know who makes the factory ones.
> >>
> >> Scott
> >>
> >> Milton Mersky wrote:
> >>
> >>> Scott:
> >>>
> >>> We have 630 hours on our plane . IO 360. Both stacks,
> facing 
> >>> rearward toward the prop, have been replaced due to
> cracks in the 
> >>> same location as yours. How about sending them out
> for coating as 
> >>> the auto guys do. Not ceramic, but another type.
> >>>
> >>> Milt
> >>>
> >>> Scott Derrick wrote:
> >>>
> >>>> I pulled my 4-into-1 exhaust system off today to
> wrap it with 
> >>>> header tape.  Trying to cool things down in this 100
> degree heat!
> >>>>
> >>>> I found another(actually two) crack(s) where the 4
> pipes go into 1. 
> >>>> I have had this thing welded two times already  for
> previous 
> >>>> cracks, in 200+ hours.  Third times the charm, its
> getting scraped.
> >>>>
> >>>> I looked on the Velocity web site and saw a rearward
> and a forward 
> >>>> facing set advertised.  Why would anybody want a
> forward facing set 
> >>>> of exhaust stacks?  Anybody have a few hundred hours
> on one of 
> >>>> these sets with good service?
> >>>>
> >>>> Scott
> >>>>
> >>>> _______________________________________________
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> >>>>
> >>>
> >>>
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> >>>
> >>
> >>
> >> _______________________________________________
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> >>
> >
> >
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> 
> 
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=====
James F. Agnew
Jim_Agnew_2@Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed