X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.25.9.101] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1365944 for flyrotary@lancaironline.net; Wed, 06 Sep 2006 09:39:15 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-111-055.carolina.res.rr.com [24.74.111.55]) by ms-smtp-02.southeast.rr.com (8.13.6/8.13.6) with SMTP id k86DcHlX003947 for ; Wed, 6 Sep 2006 09:38:34 -0400 (EDT) Message-ID: <000501c6d1b9$c53026e0$2502a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Departed Exhaust Date: Wed, 6 Sep 2006 09:38:28 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Virus-Scanned: Symantec AntiVirus Scan Engine Smart move, Buly - would have expected no less (about the prop blade removal) {:>). Hey with the new job perhaps you can institute a new line of aircraft mufflers for the rotary crowd {:>). Ed ----- Original Message ----- From: To: "Rotary motors in aircraft" Sent: Wednesday, September 06, 2006 9:05 AM Subject: [FlyRotary] Re: Departed Exhaust > Hi Ed, > I have removed the blade and replaced it with a spare new one I had from > my 3 blade configuration. > I'll make another exhaust, but with thicker tube.. Last one was too thin > and as you said it vibrated the welds untill they failed. The good news is > that I just got a job across the road from my hangar. I'm a desk driver at > aircraft exhaust overhaul facility. > Buly > >> >> From: "Ed Anderson" >> Date: 2006/09/06 Wed AM 07:57:30 EDT >> To: "Rotary motors in aircraft" >> Subject: [FlyRotary] Departed Exhaust >> >> Hi Buly, great to hear about your flight and happy to hear the missing >> exhaust component did not cause damage - however, I would inspect the >> prop >> blade very closely to make certain no small cracks in blade - >> particularly >> near the hub. >> >> Yes, I have pulverized sufficient metal by trying different exhaust >> internals to say that the shock of the exhaust pulse particular with a >> turbo >> block is tremendous. I have destroyed 1/8" thick stainless steel in a >> matter of hours. It appears that if a exhaust component is perpendicular >> to >> the front of the shock wave, the impact on the component is such to >> reduce >> its life to almost nil. If the component is at an angle then its life is >> much longer. The constant flexing of the metal at 200 times/sec at 6000 >> rpm >> caused by the strong exhaust pulse fatigues the metal extremely rapidly. >> >> The joke around my airport is "You can hear Ed long before you can see >> him!" - my response is that its a safety feature to let others know I am >> on >> my way inbound{:>). >> >> Ed >> Ed Anderson >> Rv-6A N494BW Rotary Powered >> Matthews, NC >> eanderson@carolina.rr.com >> http://members.cox.net/rogersda/rotary/configs.htm#N494BW >> ----- Original Message ----- >> From: "Bulent Aliev" >> To: "Rotary motors in aircraft" >> Sent: Wednesday, September 06, 2006 7:17 AM >> Subject: [FlyRotary] Re: OT: Gardenhose as level >> >> >> > Joe, it was a "shake down" alright with an exhaust problem like yours. >> > on Sat we did some takeoffs and landings with the CFI Ron Miller. With >> > gross weight of 1850 pounds, on takeoff I'm getting 6500-7000 rpm and >> > climb rate of about 1000 fpm. Than we went to 1500 ft over the airport >> > and i did some steep turns etc for about 40 min. It flies like a dream >> > (compared to C-172 :). Transponder did not work again. >> > Next day we got a waiver for the transponder and headed to an old >> > uncontrolled military field with two huge 5000 ft runways, so i can >> > practice landings and takeoffs. So we took off and headed for our >> > destination at 3500 ft over alligator country. Pulled back the power >> > to >> > 5000 rpm and we were cruising at 140 knots. Nothing spectacular, but i >> > kept the prop at low pitch to go easy on the engine. 15 min later, we >> > heard a bang and the plane felt like we run over a rock. First >> > reaction >> > look for a place to land. But soon everything checked out and the >> > engine >> > kept running normal with temps at 185-187F degrees with OAT at 85F. >> > Landed OK at our destination and taxied to the FBO. Ron got out first >> > and >> > started looking, but can not find anything wrong? I got out and >> > noticed a >> > slight scuff like a drag mark 3" wide on one of the Ivo blades >> > starting >> > about where the exhaust would be and going to the tip. The las oval >> > piece >> > of my shiny new exhaust was missing. Mystery solved. Ivo is a one >> > tough >> > prop to survive a 3" long 3" diam. SS pipe going hitting the blade. >> > We >> > continued with the training and I was getting good at it but with lots >> > of >> > full power takeoffs and not enough time for the engine to cool down, >> > some >> > of the coolant boiled out on takeoff and we came down to replace to >> > add >> > more coolant and check under the hood. Added some water, cleaned the >> > plugs, just in case and took off again. >> > By now it was a sweltering heat with jungle like humidity and after >> > few >> > landings, we headed home. The trip was uneventful, the engine was >> > running >> > fine around 5000 rpm. The biggest surprise later was after I removed >> > the >> > SS heat shields from around my new exhaust pipes. one pipe was totaly >> > separated at the weld, another was half cracked. >> > Sound familiar Joe:) The exhaust pulses must be ferocious? people on >> > the >> > ground said they can hear me long before they can see me coming:) >> > More later. Got to go to work. >> > Bulent "Buly" Aliev >> > FXE Ft lauderdale, FL >> > http://tinyurl.com/s5xw8 >> > >> > On Sep 5, 2006, at 11:47 PM, Joe Hull wrote: >> > >> >> OK - it's supposed to be "Shake down cruise" - don't tell me you >> >> broke >> >> down >> >> somewhere!! >> >> >> >> But congrats on flying it anyway!! >> >> >> >> Joe Hull >> >> Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA) >> >> Redmond (Seattle), Washington >> >> >> >> >> >>> -----Original Message----- >> >>> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] >> >>> On >> >>> Behalf Of Bulent Aliev >> >>> Sent: Tuesday, September 05, 2006 8:20 PM >> >>> To: Rotary motors in aircraft >> >>> Subject: [FlyRotary] Re: OT: Gardenhose as level >> >>> >> >>> >> >>>> >> >>>> Guess I need to buy some expensive clear hose ..... >> >>>> Finn >> >>> >> >>> Finn, if you buy the right size, one day you can used for your fuel >> >>> lines on the next airplane. Worked very well on the first one :) >> >>> Buly >> >>> Finally checked out in my plane. >> >>> Did my first 100 mile "cross country". Or should I say "break down >> >>> cruise" :), >> >>> >> >>> -- >> >>> Homepage: http://www.flyrotary.com/ >> >>> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >> >> >> >> >> >> -- >> >> Homepage: http://www.flyrotary.com/ >> >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >> > >> > >> > -- >> > Homepage: http://www.flyrotary.com/ >> > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >> > >> >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >