X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 05 Sep 2008 00:48:43 -0400 Message-ID: X-Original-Return-Path: Received: from mailrelay.embarq.synacor.com ([208.47.184.3] verified) by logan.com (CommuniGate Pro SMTP 5.2.7) with ESMTP id 3115060 for lml@lancaironline.net; Thu, 04 Sep 2008 23:22:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=208.47.184.3; envelope-from=liegner@embarqmail.com X-Original-Return-Path: X_CMAE_Category: 0,0 Undefined,Undefined X-CNFS-Analysis: v=1.0 c=1 a=30vL5gnL1Y8A:10 a=vOf2QIqDhnMA:10 a=VNaH5nj-o12U71FUJmIA:9 a=vM8_fAllwPzVJWoXe8EA:7 a=iYCk-Bpfi4wGHpweV1iLSKgdNf0A:4 a=3I_whO4B8K8A:10 X-CM-Score: 0 X-Scanned-by: Cloudmark Authority Engine Authentication-Results: smtp07.embarq.synacor.com smtp.user=liegner@embarqmail.com; auth=pass (LOGIN) Received: from [71.1.168.170] ([71.1.168.170:11865] helo=[172.16.1.5]) by mailrelay.embarq.synacor.com (envelope-from ) (ecelerity 2.2.2.33 r(25932/25934)) with ESMTPA id 69/78-04047-3E5A0C84; Thu, 04 Sep 2008 23:22:11 -0400 Mime-Version: 1.0 X-Sender: liegner@embarqmail.com@pop.embarqmail.com X-Original-Message-Id: In-Reply-To: References: X-Original-Date: Thu, 4 Sep 2008 23:21:40 -0400 X-Original-To: lml@lancaironline.net From: "Jeffrey Liegner, MD" Subject: Re: [LML] Re: Training (Engine Out Practice) Content-Type: text/plain; charset="us-ascii" ; format="flowed" Just to clarify for those thinking about the engine OFF procedure and the outcome, my lancair friends in cyberspace, and for those worried about my decion to practice this. As we've all discussed, we practice what we might encounter to prepare ourselves for the unexpected. One can't fully practice an engine out in a simulator or the airplane; I know no simulator that shows the prop stopped in the video image, in front of the pilot, which is initially startleing. I haven't done this much, but I've done it to specifically learn a number of important and preplanned items (and some not expected). And I've shared them here because no one else has: best glide ratio, feather vs nonfeathered, etc. Hot starts are not a problem once you find out your particular method and what to do to make it work. Ask the pilots who give demo rides at OSH and SnF...they hot start all day, so they know what works. In the air, you have to watch for fuel flow and pressure, because you won't hear the pump change tone when it grabs gas and starts pushing. You have to watch a lot of things that at other times you use your ears to monitor. Duh...but a surprise. When you crank, the Buss voltage drops quickly. With my Cheltons on that Buss, when the batter drops below a certain level (~10.5v I think), the screens drop out, and the shortly they reboot. If you rely on them to give you engine or map or PFD info, you will be started when they suddenly go blank...watch the EAU and fly the airplane via other Buss and isolated Chelton. That was a real surprise. Attempting a restart is not like on the the ground...give it some gas and a couple blade turns. 30 seconds is a LONG time...get used to it, and be patient. At 18:1 glide, I have thirty miles and plenty of time. Try to relax, expand your vision to include a lot more. Stay focused and calm. If the airplane runs out of gas, but maintains oil pressure, and I have no gas elesewhere, I better have put that prop into full feather before the engine goes cold (despite my stupidity in allowing this situation to happen). Because if I don't feather the prop ASAP, a fuel exhaustion does not cause full feather counterweighted pitch change. Surprise...but obvious in retrospect. A good lesson. There are other lessons for another time. Risk awareness and assessment is important. Minimizing risk is our goal. Practicing catastrophic engine failure in the calm of a well studied scenario is better than being thrust into this situation unexpectedly. Just my opinion...we all have our different tolerances of risk, and I concede that others have opinions different from mine. But I know that we all care greatly about our friends on this listserv. Whether you agree with me or worry about me, I know you encourage me to always be thorough and careful. My HPAT instructors are out there listening to me. If they disagreed with my postings, they have my permission to open up a can of whoop ass in front of the group and flame me. Jeff L LIVP >For Jeff L: > >Your forced landing practice with the engine shut down, even tho >you are over a runway, really worries me, especially since the >L-IV/P has a long history of hot start problems. > >I'm not questioning the legality of the procedure (I would check >with your local FSDO just to be on the safe side). My concern is >with the added risk factor. What do you gain to justify the added >risk? When your engine will not restart, do you intend to declare >an emergency? Do you expect all other pilots to give you priority? >I guarantee that if you practice this procedure enough, you will >face this problem. > >I fly the SFO pattern at 1000 RPM and 120 kts but with the speed >brakes extended. I don't pull the prop because with an actual >engine failure, I don't expect to have oil pressure. My planned >touchdown is at 1/3 the length of the runway so if the engine quits >when I advance the throttle, the landing is routine. This works for >me. Just a suggestion.... > >Anyway, please don't take my concern as criticism as its not >intended as such. In my experience, flying in the vicinity of any >airport is one of the most dangerous situations you can be in. Why >increase the risk? > >With all the latest insurance concerns, adding unnecessary risk to >routine flying just isn't prudent. > >Regards, Bill Hogarty