REFLECTOR: Exhaust systems

[Pat Shea]

--- Jim Agnew <jim_agnew_2@yahoo.com> wrote:
> All of this talk about cooking props yet I have not
> seen any pictures of a charred or burning prop. 
This
> sounds a lot like an urban legend.  Does anyone have
> some pictures?
> 
> Jim

No pics but...

 Rodney Brim and the late Steve Drybread made a
serious attempt at a rear exiting exhaust for Rodney's
XL (IO-540 w/ 3 blade MT and I think one EI). They
tried many different configurations (pipes exiting out
the existing cowl openings, pipes exiting back thru
lower & outboard openings, pipe tips turned out...)
but were unable to prevent the exhaust from damaging
the blades. Steve did have success getting a similar
engine/exhaust combination to work on the Berkut, but
since they run a 2 blade fixed pitch prop there are
multiple clocking positions. There are only two
positions for clocking the MT on this motor.
 Also, Scott Swing briefly tried a Berkut style rear
exiting exhaust on the XL prototype (IO-540 w/ 3 blade
MT) and blistered the prop. 

Pat






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