flyrotary@lancaironline.net Mailing List Archive

That is a LOT of pitch! What are the dimensions of that prop? How long was the lead time? Bill B -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Greg Ward Sent: Sunday, June 08, 2008 5:09 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Muffler failed designs. Shortly Bill, just got my prop from Craig Cato today, and want to hang it, then take a bunch of pics. Enclosed is a little teaser from this morning. Greg ----- Original Message ----- From: "Bill Bradburry" <bbradburry@bellsouth.net> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> Sent: Sunday, June 08, 2008 7:36 AM Subject: [FlyRotary] Re: Muffler failed designs. > Greg, > Do you have any pictures anywhere of your install? > > Bill B > > -----Original Message----- > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On > Behalf Of Greg Ward > Sent: Saturday, June 07, 2008 10:25 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: Muffler failed designs. > > A little off of the subject, but close. Just got my engine and turbo > mounted on the Lancair, and was wondering if anyone had ever exited the 3" > downpipe right out of the side of the cowling, ala turbine exhaust types, > (thrust???) it would eliminate 2 bends, and about 3' of pipe, and with > the > turbo, it should be relatively quiet. Any thoughts? > Greg Ward; > Lancair Legacy RG 20B getting closer to startup....... > > ----- Original Message ----- > From: <neilak@sympatico.ca> > To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> > Sent: Saturday, June 07, 2008 4:08 PM > Subject: [FlyRotary] Muffler failed designs. > > >> Al, >> >> If you go through the archives, you'll find lots of examples of >> failed muffler designs. Many by your's truly. I think I've tried every >> concoction known to man and the Swiss. They all worked... for a while. >> >> Actually, the many variations of the Swiss muffler I tried had the >> best exhaust note by far. None lasted more than an hour, some less than >> a >> few minutes. Heat wasn't so much the problem since I had found many >> materials good to 2200F but none could stand the pounding. >> http://www.piteraq.dk/flight/muffler.html >> >> My best overall design (see attached) is a 2" tube, full of holes >> inside a 5" tube. All made of 16ga SS, all welded together. Needless to >> say, the flange is more like 3/16" - 1/4" SS. The inside end of the 2" >> tube >> is welded to the end cap of the 5" tube. That blocks off the one end of >> the >> 2" tube and secures it from movement. The exhaust end of the 2" tube is >> welded through a 2" hole in the other 5" end cap. Rather than drilling >> the >> 2" tube full of round holes, we cut slots with a saw. Then take a big >> flat >> blade screwdriver, stick it in the slot and bend it over. This creates >> an >> oblong hole. (Much easier than drilling into SS. This is what will go >> on >> the Volmer. >> >> The sound is quite acceptable, it fits inside the cowl and Jim M.'s >> version lasted the life of the aircraft... 600+ hours. >> >> Neil >> >> PS: Are you considering Rough River? >> >> >> >> -----Original Message----- >> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On >> Behalf Of Al Wick >> Sent: Saturday, June 07, 2008 4:57 PM >> To: Rotary motors in aircraft >> Subject: [FlyRotary] Re: Mistral Crash Analysis >> >> C'mon guys. You do this every time there's a crash. Instantly go into >> rationalization mode. It's unhealthy. Greatly increases risk builders >> won't >> take action. Increases risk you won't research it thoroughly. >> >> A healthy response would be:" Here's another example of how our engines >> produce unusually destructive exhaust temperature and pulses. We have a >> rich >> >> history of broken exhaust components. We need to be very thorough when >> designing and building exhaust." >> >> I designed my own muffler. It had two inlets, two outlets. So if (when) >> my >> muffler failed, it could never block both pipes. I also put loose safety >> wire around my pipes, because on a pusher loosing pipe wipes out prop. So >> basically, I assume stuff will fail, then design it to control the way >> it >> fails. I've heard of rotary guys doing same type of thing. This is a good >> time to share those key items. >> >> On your car, they deliberately design products to fail a certain way. >> They >> will make a component weak, so it fails first. They do that with wheels >> and >> hubs. So when the muffler fails, little pieces come apart, not big >> sections? >> >> You guys do a great job of sharing successes, design and construction >> details. This is another opportunity. >> >> -al wick >> >> >> >> >> <No doubt you are on the money, Rusty. When folks are already >> predisposed >> to bad mouth the rotary - this will only be more ammunition. "See! even >> with umpteen million dollars you can't get one to fly" {:>). But, I >> serious doubt it will effect many who have researched the rotary and come >> to >> >> understand its benefits - as for the rest, who cares {:>) >>> >> >> I'm certain it was a relief to Mistral that the culprit was not one of >> their engine components. >> >> >> >> Whew! a close one for sure. >> >> >> >> Hi Ed, >> >> >> >> Unfortunately, I bet the majority of people will only hear "Mistral >> rotary", "lost power", and "crash" :-( >> >> >> >> Rusty (RV-3 taking forever.) >> >> ____________________________________________________________ >> Orlando Vacations - Click Here! >> > http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3nK7u59LkagfZ5IcEgGqYcvPRC >> wA85GgQITbFK9vE7wPGKFP/ >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: >> http://mail.lancaironline.net:81/lists/flyrotary/List.html >> > > > ---------------------------------------------------------------------------- > ---- > > >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: >> http://mail.lancaironline.net:81/lists/flyrotary/List.html >> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >