> >> > >Ben Baltrusaitis wrote:
     > >> > >
     > >> > >Does anyone run their 20B without a muffler?
     > >> > >I was told by an engine builder that the sound of

the 20B is not as

     > intense as the 13B and could be run without a muffler.

He said the sound was

     > much like
     > >> > a
     > >> > >piston V-6.
     > >> > >Thanks!
     > >> > >Ben

     Thomas Parkes wrote:
     >
     > Ben:
     >
     > I run my 20B without a muffler--but I do have a Garrett

TE-06 turbo which

     > acts like a muffler.  I sometimes forget to activate my

noise-cancelling

     > headset, with no adverse effects.  People on the ground

tell me it sounds

     > powerful but not any louder than a Lycoming.
     >
     > Tom Parkes
     > 20B powered Lancair ES

Ben Baltrusaitis wrote:

Tom,
Thanks for the response! I really don't want to put a muffler

on the belly and was considering a turbo to avoid the muffler.
You have made the final decision

for me!
Where are you located with the ES? I would like to see your

plane and the installation if you are not to far from Pennsylvania.

Ben

Ben, I must admit that I have the opposite experience from Tom.  I am
running a 13B with a turbo (stock) and no muffler.  It is loud!  Everyone
remarks that they can hear me coming long before they see me.  Everyone
always knows when I am taking off, and the wife doesn't like it because it
is too loud.

I will sometimes press people and say "Isn't it just a different sound, and
not really any louder?"  Most will humor me and agree.

I am currently experimenting with a race muffler to take to bite off.

Dave Leonard

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