Original Posted By: Rcaprd(at)aol.com
Hi,I have a newly rebuilt O-200 sitting here waiting (and waiting) for me tofinish the fuselage. It occurred to me that almost every Piet I have seenhas no mufflers but are usually 65 to 85 hp. Do I need to concern myselfwith a muffler or something else to make enough back pressure to keep theO-200 happy? Will straight pipes burn valves?Thanks,Ted90% done and 90% to go.________________________________________________________________________________
Pietenpol-List: O-200 need muffler?
RE: Pietenpol-List: O-200 need muffler?
Original Posted By: "Phillips, Jack"
Subject: Re: Pietenpol-List: In Flight VideoIn a message dated 5/1/2005 3:19:15 PM Central Standard Time, mosnei2(at)aol.com writes:Hi Chuck,Thats very interesting.. cant wait until you have a video available. Nice looking plane from what I can see, do you have a website or do you have any otherphotos of your plane?Best Regards,DerrickDerrick,I should have several video's available within the next couple of weeks. I don't have a web site, but I have all my detail construction and completed pictures included in the video's, along with narriation. The titles of the onesthat I have started (but not finished) are:1) Pietenpol & Aviation History, Reading the Pietenpol Plans, Infomation Sources2) Tips & Tricks - Airframe3) Tips & Tricks - Engine / Prop4) Flying NX770CG 5) America Tour '04________________________________________________________________________________Subject: RE: Pietenpol-List: O-200 need muffler?Date: Mon, 2 May 2005 07:20:25 -0400
Subject: Re: Pietenpol-List: In Flight VideoIn a message dated 5/1/2005 3:19:15 PM Central Standard Time, mosnei2(at)aol.com writes:Hi Chuck,Thats very interesting.. cant wait until you have a video available. Nice looking plane from what I can see, do you have a website or do you have any otherphotos of your plane?Best Regards,DerrickDerrick,I should have several video's available within the next couple of weeks. I don't have a web site, but I have all my detail construction and completed pictures included in the video's, along with narriation. The titles of the onesthat I have started (but not finished) are:1) Pietenpol & Aviation History, Reading the Pietenpol Plans, Infomation Sources2) Tips & Tricks - Airframe3) Tips & Tricks - Engine / Prop4) Flying NX770CG 5) America Tour '04________________________________________________________________________________Subject: RE: Pietenpol-List: O-200 need muffler?Date: Mon, 2 May 2005 07:20:25 -0400
Pietenpol-List: O-200 need muffler?
Original Posted By: Steve Ruse
> Pietenpol-List: O-200 need muffler?
Original Posted By: Michael D Cuy
RE: Pietenpol-List: O-200 need muffler?
Original Posted By: owner-pietenpol-list-server(at)matronics.com
As for "burning the valves", in my experience with cars, I believe 10"-12"ofpipe is enough to protect the valves. Basically I think you are just tryingtokeep cold/oxygen rich air away from them. Maybe someone else here canconfirmor deny that.As for backpressure, I see a lot of discussion on that, on both sides of thefence, and my take has always been that it is not necessary at all, andunlessyou want to get into a tuned exhaust system it isn't even worth discussing.I've never seen a dyno graph that showed reduced torque at any RPM due to alower backpressure exhaust system. From an engineering standpoint, Iwouldn'texpect to see reduced power either.My GN-1 with an A-75 and open pipes is quite noisy! A large portion of thenoise my passenger's mic picks up is from the exhaust, I can clearly hear itthrough my headset. I wish it was quieter at times, but honestly with adecentheadset it doesn't bother me. I don't know what a typical muffler weighsfor anO-200, but I wouldn't want to pay much of a weight penalty to make the planequieter. Right now my intercom is nearly useless due to the wind/enginenoise.Last week I ordered some leather mic covers/muffs that should help a lot.I've used them in a Starduster and they did help a lot, although it is hardtocompare it to the Pietenpol since the Starduster had mufflers and a lesswindycockpit. I don't even remember where I ordered them from now, I can checkthisevening if anyone wants to know. I won't be able to try them out until nextweekend.Steve Ruse - Coppell, TXN6383J - KGYI-----Original Message-----
As for "burning the valves", in my experience with cars, I believe 10"-12"ofpipe is enough to protect the valves. Basically I think you are just tryingtokeep cold/oxygen rich air away from them. Maybe someone else here canconfirmor deny that.As for backpressure, I see a lot of discussion on that, on both sides of thefence, and my take has always been that it is not necessary at all, andunlessyou want to get into a tuned exhaust system it isn't even worth discussing.I've never seen a dyno graph that showed reduced torque at any RPM due to alower backpressure exhaust system. From an engineering standpoint, Iwouldn'texpect to see reduced power either.My GN-1 with an A-75 and open pipes is quite noisy! A large portion of thenoise my passenger's mic picks up is from the exhaust, I can clearly hear itthrough my headset. I wish it was quieter at times, but honestly with adecentheadset it doesn't bother me. I don't know what a typical muffler weighsfor anO-200, but I wouldn't want to pay much of a weight penalty to make the planequieter. Right now my intercom is nearly useless due to the wind/enginenoise.Last week I ordered some leather mic covers/muffs that should help a lot.I've used them in a Starduster and they did help a lot, although it is hardtocompare it to the Pietenpol since the Starduster had mufflers and a lesswindycockpit. I don't even remember where I ordered them from now, I can checkthisevening if anyone wants to know. I won't be able to try them out until nextweekend.Steve Ruse - Coppell, TXN6383J - KGYI-----Original Message-----
Pietenpol-List: O-200 need muffler?
Original Posted By: "walt evans"
Has anybody tried the muffler tips off a VW (the straight section at the end, chromed, about 8" long)? Or possibly the "insert" section that motorcycle exhausts use, sort of a dimpled tube baffle that slips inside the end of the exhaust?I might experiment with something, once I get 41CC flying again...Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________Date: Tue, 03 May 2005 10:55:03 -0500
Has anybody tried the muffler tips off a VW (the straight section at the end, chromed, about 8" long)? Or possibly the "insert" section that motorcycle exhausts use, sort of a dimpled tube baffle that slips inside the end of the exhaust?I might experiment with something, once I get 41CC flying again...Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________Date: Tue, 03 May 2005 10:55:03 -0500
RE: Pietenpol-List: O-200 need muffler?
Original Posted By: Galen Hutcheson
Thanks for all the good comments. I guess I will go with what we have onthe present 65 Cont. I love the sound. After over 400 hours in it I didn'trealize it was noisy. Should have know when we could never get agood conversation over the intercom.On that subject I would like to know if anyone has come up with a goodcombination of headsets and intercom that works in a Piet.Thanks again,Ted________________________________________________________________________________Date: Tue, 3 May 2005 22:38:20 -0700 (PDT)
Thanks for all the good comments. I guess I will go with what we have onthe present 65 Cont. I love the sound. After over 400 hours in it I didn'trealize it was noisy. Should have know when we could never get agood conversation over the intercom.On that subject I would like to know if anyone has come up with a goodcombination of headsets and intercom that works in a Piet.Thanks again,Ted________________________________________________________________________________Date: Tue, 3 May 2005 22:38:20 -0700 (PDT)
Re: RE: Pietenpol-List: O-200 need muffler?
Original Posted By: Clif Dawson
Re: RE: Pietenpol-List: O-200 need muffler?
Original Posted By: "Ted Brousseau"
TedI agree, that put-put sound is part of the overall joy. Lets not talk to the Harley drivers about mufflers either.Dick N.----- Original Message -----
TedI agree, that put-put sound is part of the overall joy. Lets not talk to the Harley drivers about mufflers either.Dick N.----- Original Message -----
RE: Pietenpol-List: O-200 need muffler?
Original Posted By: "walt evans"
RE: RE: Pietenpol-List: O-200 need muffler?
Original Posted By: owner-pietenpol-list-server(at)matronics.com
I use a Sigtronics 400 N intercom in a Ferugson Ultralite with a Rotax 503sitting right above my head. This plane is noisy. The intercom works great.It is made for open cockpit and war birds. I use standard head sets with outANR and have plenty of volume and clarity. We talked to Dave Clark atsun-n-fun about head sets in open cockpit flying. To our surprize they saidto use one of there cheapest set. I can get you the model number this weekend. They said that ANR models will not work right in the open cocpitenvorment. To much wind.I would give the 400N intercom a ride. It run about $235.00-----Original Message-----
I use a Sigtronics 400 N intercom in a Ferugson Ultralite with a Rotax 503sitting right above my head. This plane is noisy. The intercom works great.It is made for open cockpit and war birds. I use standard head sets with outANR and have plenty of volume and clarity. We talked to Dave Clark atsun-n-fun about head sets in open cockpit flying. To our surprize they saidto use one of there cheapest set. I can get you the model number this weekend. They said that ANR models will not work right in the open cocpitenvorment. To much wind.I would give the 400N intercom a ride. It run about $235.00-----Original Message-----
RE: RE: Pietenpol-List: O-200 need muffler?
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Ted,I've been waiting to respond to this until I had a chance to test my newsetup. I'm using a David Clark H13.4 headset and an H10-40. I also have aLightspeed 15K headset that I've used, but it is larger than the DC's so itcatches more air. Two weeks ago the Lightspeeds departed a taller friend'shead when he was up front in my GN-1, luckily the cord was velcro-tied tothe cabane and I grabbed the headset when it was flopping around beside me.That at least says something for the quality of the Lightspeed cable, itdidn't break and the headset still works fine. The noise canceling featureis almost useless in open cockpit planes. That fact along with the smallerprofile means I'll be using the DC's exclusively in the GN-1 in the future.I'm also using a Troll Avionics Inc. HV-1 Hypervox intercom. This is a fourplace panel mount intercom, not what you would expect in an Aircamper (itcost me $30 on Ebay). Right now it isn't installed, I just made a"portable" wire harness for it, but I plan to install it out of sight underthe panel. It works great, and has more than enough volume even for a noisyPietenpol cockpit (I have no mufflers on my A-75). Earlier this week Iinstalled mic covers from Oregon Aero on the microphones of both headsets($12 each). Without the covers, the intercom was virtually worthless. Wecould talk on the ground, but once we got in the air, the squelch had to beso high to cut out engine & wind noise that we couldn't speak loud enough toactivate the intercom. With the mic covers, even my fianc can speak to mewith relative ease, and she sometimes has trouble even getting the intercomin a Cessna 150 to pick her up. I was pretty impressed, and now I think themic covers are a must have if you are going to try to use an intercom in anopen cockpit plane.Steve Ruse - Coppell TXN6383J - KGYI-----Original Message-----
Ted,I've been waiting to respond to this until I had a chance to test my newsetup. I'm using a David Clark H13.4 headset and an H10-40. I also have aLightspeed 15K headset that I've used, but it is larger than the DC's so itcatches more air. Two weeks ago the Lightspeeds departed a taller friend'shead when he was up front in my GN-1, luckily the cord was velcro-tied tothe cabane and I grabbed the headset when it was flopping around beside me.That at least says something for the quality of the Lightspeed cable, itdidn't break and the headset still works fine. The noise canceling featureis almost useless in open cockpit planes. That fact along with the smallerprofile means I'll be using the DC's exclusively in the GN-1 in the future.I'm also using a Troll Avionics Inc. HV-1 Hypervox intercom. This is a fourplace panel mount intercom, not what you would expect in an Aircamper (itcost me $30 on Ebay). Right now it isn't installed, I just made a"portable" wire harness for it, but I plan to install it out of sight underthe panel. It works great, and has more than enough volume even for a noisyPietenpol cockpit (I have no mufflers on my A-75). Earlier this week Iinstalled mic covers from Oregon Aero on the microphones of both headsets($12 each). Without the covers, the intercom was virtually worthless. Wecould talk on the ground, but once we got in the air, the squelch had to beso high to cut out engine & wind noise that we couldn't speak loud enough toactivate the intercom. With the mic covers, even my fianc can speak to mewith relative ease, and she sometimes has trouble even getting the intercomin a Cessna 150 to pick her up. I was pretty impressed, and now I think themic covers are a must have if you are going to try to use an intercom in anopen cockpit plane.Steve Ruse - Coppell TXN6383J - KGYI-----Original Message-----
Oshkosh observations
Original Posted By: "Phillips, Jack"
Jack and Mike,Great perspective on th the Big "O" event, if Pietlovers want something a little less comercial there is always room for a few more Piets at the SAA flyin at FRASCA Feild which is very close in flavor to the old Rockford days. Paul's latest contribution to the Grass roots. Usually one or two Piets attend and the grass gets stomped down around them to the neglect of any RV that shows up. As the Piets were getting ready to leave last year the crowd gathered around to soak them in and Paul Pobrenzy mentioned you never see a crowd gather for the departure of a RV. Matt http://www.sportaviation.org/ Subject: Oshkosh observations
Jack and Mike,Great perspective on th the Big "O" event, if Pietlovers want something a little less comercial there is always room for a few more Piets at the SAA flyin at FRASCA Feild which is very close in flavor to the old Rockford days. Paul's latest contribution to the Grass roots. Usually one or two Piets attend and the grass gets stomped down around them to the neglect of any RV that shows up. As the Piets were getting ready to leave last year the crowd gathered around to soak them in and Paul Pobrenzy mentioned you never see a crowd gather for the departure of a RV. Matt http://www.sportaviation.org/ Subject: Oshkosh observations
Jack Phillips Pietenpol-List: Oshkosh observations
Original Posted By: Michael D Cuy
Pietenpol-List:
Original Posted By: Galen Hutcheson