Hey,  maybe you can try this- put an exhaust splitter/turnout so
that you can use  the muffler, and if it craps out on you, you can
just open the exhaust  turnout and use unmuffled exhaust to get back
on the ground. It would also  be an interesting exercise in how much
power you could make un-muffled. You could also use it when  landing
 at remote airstrips to  chase the wildlife away from the runway.
Brian Trubee

Or make the bypass spring loaded so that a blockage would  overpower
the spring and open the valve.

Lynn E. Hanover

Brian,
           Don't laugh about animals on the strip, a few years back
when I still had sheep, they were all over my runway, and no amount
of buzzing would budge them. I( was in my baron with a full load of
passengers who were no impressed with all the aerobatics I was doing
to try and get the sheep to move. Luckily the bloke living in the
house at that time saw my dilemma and drove out and shifted the
rotten sods, or I'd probably still be trying to get down.  Neil.

You need to equip your sheep dog with an airband radio :)

Paul Lamar

Ok I'll bite, what is the can pushed down on the sheep's back for??

Dale Davies