X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-gw0-f52.google.com ([74.125.83.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5067915 for flyrotary@lancaironline.net; Fri, 29 Jul 2011 14:14:53 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.83.52; envelope-from=rwstracy@gmail.com Received: by gwj15 with SMTP id 15so5037745gwj.25 for ; Fri, 29 Jul 2011 11:14:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; bh=mWpmuWXP33PYC+l0Pn0iGJ21uGxxltuNvquE3VbfWzc=; b=m5weEYzUvQPzf4yZBbzcVm5219DU7vK48tdl2w9b1741y698S9WwjiNaV3GQitL7uE ANg3YkKCv83m54RXBQzZSfbr4mXtzCia2vLy5A/iJCGoWdIal1mE6T7/5dz8Sej4CQWf 7IsClMuB+FopNFVoI4aHsgvTHeYLB8fi9EZV8= Received: by 10.236.153.70 with SMTP id e46mr5343yhk.371.1311963255772; Fri, 29 Jul 2011 11:14:15 -0700 (PDT) Return-Path: Received: from [10.0.1.3] (99-197-145-127.cust.wildblue.net [99.197.145.127]) by mx.google.com with ESMTPS id z28sm1361582yhn.77.2011.07.29.11.14.05 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 29 Jul 2011 11:14:15 -0700 (PDT) Subject: Re: Back to Phase 1 testing References: From: Tracy Content-Type: text/plain; charset=us-ascii X-Mailer: iPad Mail (8F191) In-Reply-To: Message-Id: <5857F933-B3A4-4FFE-8C9F-4607F90F8014@gmail.com> Date: Fri, 29 Jul 2011 14:13:49 -0400 To: Rotary motors in aircraft Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (iPad Mail 8F191) Was finally getting around to doing hot weather cooling and altitude perform= ance testing in the RV-8 yesterday. Cooling was good during a high power c= limb to 14500 ft where I leveled out ( I had forgotten to put the Ox bottle i= n the plane). Throttled up to WOT to see where the speed topped out at but= . After less than a minute I felt some engine roughness and noticed rotor 3= EGT went above alarm threshold so I throttled back to low power. #3 EGT t= hen went low off scale and I could tell that the engine was only running on 2= rotors. I then smelled a faint electrical burning smell that lasted about= 2 minutes. Engine was surprisingly smooth for having a dead rotor and sti= ll had more than enough power for cruise flight but obviously it was time to= get back on the ground and find out what went wrong. did all the usual di= agnostics on the long glide down with no joy. Made normal landing, poped off the cowl and coil diagnostics test revealed t= hat both coils on rotor 3 were dead. I had done the coil disable tests pri= or to takeoff so I know they were both good then. I'm using RX-8 coils and t= here have been too many failures for me to feel good about them any longer. = I ordered a set of LS-1s to replace them. Tracy=