flyrotary@lancaironline.net Mailing List Archive

Earnest,

I was wondering about the aerodynamic shape. Do you plan to have it in the airstream? It seems that flat surfaces have been a problem in some other mufflers. You may need to install some ribs or such to strengthen the flat surfaces if they prove to be a problem later??

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Dwayne Parkinson
Sent: Tuesday, May 08, 2012 10:38 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Muffler design

Interesting design. I'll be anxious to hear the final decibel numbers. Also, have you figured out a way to measure the back-pressure? That's always a challenge with complex muffler designs.

From: Ernest Christley <echristley@att.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sunday, May 6, 2012 4:35 PM
Subject: [FlyRotary] Muffler design

I made a series of videos of muffler. It was easier than trying to explain in an email.

I've not taken any measurements yet, but subjectively I think it's working well. Even after I turned the injectors around, fuel is still pooling in the intake manifold. I've got a more drastic fix curing right now, so I might have valid numbers in a couple days.

http://www.youtube.com/watch?v=n7m6t8ZnUT4

http://www.youtube.com/watch?v=3aUivLupypE

http://www.youtube.com/watch?v=CFEO_DEkOWY

http://www.youtube.com/watch?v=KPQclfSK4DI
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