Lloyd E. Sponenburgh wrote:
"Stuart & Kathryn Fields" fired this volley in
:
.wescottdesign.com

Tim: I just need the modelling done for each of 4 pipes. I've found
a shop that says they can bend SS tube to match my model.


That's good, because flex pipe doesn't resonate well. You need a good
model, and rigid pipe (go with the bender guys).

(Ahhh... the SWEET sound of an un-muffled O-540 with tuned pipes!)
(oh... sorry... that's an o-320... a little guy)
I did some work on an Aero Commander 500C a couple decades ago, with a pair
of IGSO 540s. The only muffling was a perforated "basket" around the
straight pipe coming out the top of the engine. I wouldn't call it a
"sweet" sound, either. Awesome, yes! Still no comparison to the sound
of a Merlin idling, though.

Jon