REFLECTOR: Exhaust systems

[Pat Shea]

Keith/Richard/Wayne, 

I had Clinton at Custom Aircraft Parts design a new
exhaust system specifically for the XL w/ an IO-540
that he felt would not be prone to cracking (obvious
reasons), wasn't forward facing (fire concerns), and
wasn't rearward facing (prop cooking issues w/ IO-540
& three blades). There is considerably more cowl
clearance than my factory system w/ no blisters or
bulges required.
 Keith, I'm not flying so no field report yet -
Clinton might be able to give you a reference to
someone who is flying w/ this system. As far as the
90* bends, that probably will be more aerodynamic -
that exhaust plume exiting at least 90* to the
airstream can't be pretty. I would think you'd want
there to be 1 1/2" - 2" between the outside of the
lower cowl and the top of the exhaust pipe after the
bend to avoid permanent cowling stains, which means
there's going to be 4"-5" of pipe exposed to the
airstream. That shouldn't be an issue w/ this system,
although I think that much pipe sticking could cause
problems w/ a forward facing stack. Hopefully we can
compare notes once we're both flying! 
 
Best, Pat

--- Wayne Lanza <wlanza@bellsouth.net> wrote:
> Hi Guys,
>   Please note that the aircraft shown in the photos
> at the web site 
> mentioned below
> is a standard body Elite NOT an XL. Looking at the
> last photo you will 
> also see that
> this exhaust system will require a substantial
> blister (bulge) to fair 
> in the pipes. I'd
> suspect that an installation on an XL would also
> require some fairing 
> work...
> 
> Fly Safe,
> Wayne Lanza
> Composite Design, Inc.
> 
> I'll be at Oshkosh with Velocity this year, please
> stop by & visit.
> 
> visit our web page:
> http://www.CompositeDesignInc.com
>
________________________________________________________________
> 
> On Wednesday, July 9, 2003, at 01:03 AM,
> KeithHallsten wrote:
> 
> > Richard,
> >
> > No, the Berkut exhaust shown on the Custom
> Aircraft website exits the 
> > cowl
> > right next to the ring gear, aimed right at the
> root of the prop 
> > blades.
> > The system I'm talking about exits directly below
> the #3 & #4 
> > cylinders.
> > The photos on their website
> 
> > http://www.customaircraft.com/images/VELOCITYP.JPG
> shows this clearly.
> >
> > Keith Hallsten
> 
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