X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1043289 for flyrotary@lancaironline.net; Wed, 22 Mar 2006 22:29:52 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.67; envelope-from=sladerj@bellsouth.net Received: from ibm60aec.bellsouth.net ([65.8.219.129]) by imf19aec.mail.bellsouth.net with ESMTP id <20060323032910.QDNU13612.imf19aec.mail.bellsouth.net@ibm60aec.bellsouth.net> for ; Wed, 22 Mar 2006 22:29:10 -0500 Received: from [192.168.1.18] (really [65.8.219.129]) by ibm60aec.bellsouth.net with ESMTP id <20060323032909.TFIV4097.ibm60aec.bellsouth.net@[192.168.1.18]> for ; Wed, 22 Mar 2006 22:29:09 -0500 Message-ID: <44221604.80907@bellsouth.net> Date: Wed, 22 Mar 2006 22:29:08 -0500 From: John Slade User-Agent: Thunderbird 1.5 (Windows/20051201) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Turbonetics T04 rotary flies References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Interesting thoughts. Thanks, Todd. I'll check tomorrow. John Todd Bartrim wrote: > Hi John; > Have you checked your wastegate actuator to ensure it's working. You can do > this easily with a nozzle on your compressed air hose (assuming you have one > at your hangar), but DO NOT push the nozzle directly against the actuator > MAP sense inlet, instead just direct the air at it from ~12" away. This will > safely move the actuator without overpressuring it. (this is probably > obvious advice to most). > My original wastegate installation was moved slightly from stock position > for clearance reasons which resulted in the actuator shaft being slightly > cocked to one side. I didn't think it was enough to affect anything, but > after ~20 flight hours the diaphragm failed due to this. I was cruising at > the time, when suddenly MAP increased ~10". I throttled back until I felt > reasonably certain that I knew what it was (while heading straight back to > the airport) then began to try different throttle settings. I found it was > difficult to control the boost above (~40") but not hard below that. (note- > these numbers are from an overloaded memory as I'm at school right now and > don't have access to my log book). When I replaced the actuator I ensured it > was precisely in the stock position, to ensure that the shaft alignment > wasn't altered and I dealt with the clearance issues some other way (can't > remember right now). > > Todd > Turbo 13B RV9 > > >> -----Original Message----- >> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On >> Behalf Of John Slade >> Sent: Wednesday, March 22, 2006 11:31 AM >> To: Rotary motors in aircraft >> Subject: [FlyRotary] Re: Turbonetics T04 rotary flies >> >> >> Hi Barry, >> Yes, the wastegate is 46mm in diameter, but it only works when it's >> open. So far I don't think it's opening, but I could be wrong. I'm >> hoping it's just a matter of adjustment. I'll tweak it down a little >> more in the morning. The main exhaust is 3 inches, and the wastegate >> exhaust is 1.5. I do have a blow-off valve set at around 50 MAP. >> John >> >> >> -- >> 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/ > >