Yes, but only about 70 hrs so far. SS is not as high quality as the 304ss pipe we used, the webing seems to be better though. Hushpower muff. 2" aft of flex, slip sleeves 10" before flex & cer. coating inside/outside on pipes from slips back to rotor housings. David R. Cook RV6A Rotary
From: "Dennis Havarlah" <flyrotary@lancaironline.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, January 21, 2017 5:21:19 PM
Subject: [FlyRotary] Re: exhaust wraps and blankets
After about 700 hours and 8 years flying I have decided to design and build a new exhaust system for my RV-7A powered by a 4 port RX 8 Renesis engine. Bobby Hughes has offered advice and greatly assisted me in this endeavor.
The new exhaust was designed with three header pipes routed into a 3 to 1 collector that is 3 inches in diameter. The headers and collector direct the exhaust toward the firewall. A combination of 3 inch and 2.5 inch pipe take the exhaust down and out the bottom of the cowl and the exhaust exits about 12 inches back from the firewall.
I have flown with the new exhaust and discovered it causes a lot more vibration to the airframe than the old exhaust. (I have a ball joint in the down pipe at the firewall). I want to add a flexible joint down stream of the 3 to 1 collector and have about 3 inches space for it. MY Question - Has anyone used a flex coupling or a flex bellows as seen on Summits web site? The flex coupling is a woven stainless joint with a liner inside and weldable ends. The flex bellows looks like a metal bellows on the outside and has a slip joint built inside.
Anyone have any experience with these on the rotary?
Thanks,
Dennis Haverlah