X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: (direct reply)\eX-PolluStop-Score: 0.00\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from relay04.roc.ny.frontiernet.net ([66.133.182.167] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 867153 for flyrotary@lancaironline.net; Wed, 13 Apr 2005 00:00:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.133.182.167; envelope-from=canarder@frontiernet.net Received: from filter10.roc.ny.frontiernet.net (filter10.roc.ny.frontiernet.net [66.133.183.77]) by relay04.roc.ny.frontiernet.net (Postfix) with ESMTP id 2CECB358281 for ; Wed, 13 Apr 2005 03:59:17 +0000 (UTC) Received: from relay04.roc.ny.frontiernet.net ([66.133.182.167]) by filter10.roc.ny.frontiernet.net (filter10.roc.ny.frontiernet.net [66.133.183.77]) (amavisd-new, port 10024) with LMTP id 03525-08-93 for ; Wed, 13 Apr 2005 03:59:17 +0000 (UTC) Received: from [127.0.0.1] (67-137-85-235.dsl2.cok.tn.frontiernet.net [67.137.85.235]) by relay04.roc.ny.frontiernet.net (Postfix) with ESMTP id 73438358054 for ; Wed, 13 Apr 2005 03:59:16 +0000 (UTC) Message-ID: <425C990A.70706@frontiernet.net> Date: Tue, 12 Apr 2005 22:59:06 -0500 From: Jim Sower User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040514 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Air Cleaners-Screens References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Antivirus: avast! (VPS 0515-1, 04/12/2005), Outbound message X-Antivirus-Status: Clean X-Virus-Scanned: by amavisd-new-20040701 (2.0) at filter10.roc.ny.frontiernet.net The way to go IMO is a direct shot from outside to the TB with a flapper that can close that and open to filtered engine compartment air. Take off on filtered air, switch to ram air when you're out of the dust cloud. If takeoff is expected to be marginal, take a chance with the ram air. I plan to have a cavity in the plenum to accumulate gravel and FOD if I have the space. But that's just me ... Jim S. Bill Dube wrote: > Snow can clog a screen. If you put in a filter or a screen, > you must put in some sort of by-pass in case it gets clogged with snow. > > > At 02:26 PM 4/12/2005, you wrote: > >> Where in heavens name do you fly, Jim? That many bugs I want to say >> away from {:>). They would likely dimple and distort the leading >> edge causing a total disruption of airflow and then a spiraling >> descent -well, you get the idea. >> >> >> >> Ed A >> >> ----- Original Message ----- >> From: James Maher >> To: Rotary motors in aircraft >> Sent: Tuesday, April 12, 2005 4:21 PM >> Subject: [FlyRotary] Re: Air Cleaners-Screens (was Re: Latest on >> the Motor Trouble >> >> One situation that I can think of, that is very likely to occur >> would be flying into a swarm of bugs. Even a coarse screen such >> as Al has installed could >> easily become clogged with dead bugs choking off all intake air >> and causing the engine to stop running. That swarm of bugs >> without the screen would in all likelyhood be ingested and spit >> out through the exhaust without so much as a hiccup by the >> engine. Just playing devils advocate. :o) >> Jim >> >> Jerry Hey wrote: >> >> >> snip >> >> This is kind of a weird >> topic to me as I can't think of any reason to not protect the >> engine >> with a filter. >> >> snip >> >>> Homepage: http://www.flyrotary.com/ > >>> Archive: http://lancaironline.net/lists/flyrotary/List.html > > > >