? In the Experimental world, mufflers are typically left off since the are not required, and are both expensive, and heavy. I run open headers on the O-200 on my KR. The prop typically makes as much or more noise than the exhaust. I chose to put my $$ into noise cancelling headsets rather than a high $$ exhaust. An A-65 turns slow enough that they are relatively quiet anyway. No doubt you've heard a Champ (air knocker) fly over. They got the Air Knocker moniker for their unique sound using a pair of open "Y" pipes for the exhaust. Cubs and Taylorcraft (all with A-65s) both had mufflers on them. So it's really up to you as to whether you think a Champ is noisy enough that you would want to muffle it.
On my SuperCub Clone, I chose to use the exhaust from a Grumman Cheetah. I happened to be at a Grumman salvage yard near San Antonio and asked what they would charge for a used exhaust. The guy said they can't sell them, then handed me two of them that I was able to modify for use on the SuperCub. I must say, I do like having a quiet exhaust with a really good heat exchanger for cabin heat. I often times cruise the Cub at very low throttle settings, so with the engine turning slow and not making much power, it is not offensive to people on the ground when I fly over at low level. I rarely fly low in the KR, and rarely fly it at low throttle settings, so I am usually high enough that the noise from the KR isn't offensive to ground dwellers. -Jeff Scott ------------------ > Does anyone have a muffler on their engine? I think those are relatively rare in the Experimental world (in the US, at least). I once installed some "silencers" inside the 1.5" exhaust pipes on the Corvair (think VW Beetle tailpipe), just before flying to OSH one year. It made a noticeable difference, but not huge. When I got back I discovered one of them had loose and had slid out an inch or two, and the other one was gone entirely! Somewhere along the way there's a silencer in a field. The Corvair wouldn't get rave reviews on flybys with a muffler! Mark Langford ML at N56ML.com http://www.n56ml.com _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search[http://tugantek.com/archmailv2-kr/search]. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html[http://www.krnet.org/info.html] see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org[http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org] to change options
