X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nk11p08mm-asmtp001.mac.com ([17.158.58.246] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6360960 for flyrotary@lancaironline.net; Thu, 04 Jul 2013 08:19:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=17.158.58.246; envelope-from=steveizett@me.com Received: from [10.1.1.11] (203-59-10-134.dyn.iinet.net.au [203.59.10.134]) by nk11p08mm-asmtp001.mac.com (Oracle Communications Messaging Server 7u4-26.01(7.0.4.26.0) 64bit (built Jul 13 2012)) with ESMTPSA id <0MPE00JQXVIZLS30@nk11p08mm-asmtp001.mac.com> for flyrotary@lancaironline.net; Thu, 04 Jul 2013 12:18:39 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.10.8794,1.0.431,0.0.0000 definitions=2013-07-04_04:2013-07-04,2013-07-04,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1305010000 definitions=main-1307040067 From: Stephen Izett Content-type: text/plain; charset=us-ascii Content-transfer-encoding: quoted-printable Subject: Ram Air and filters Message-id: Date: Thu, 04 Jul 2013 20:18:36 +0800 To: Rotary motors in aircraft MIME-version: 1.0 (Mac OS X Mail 6.5 \(1508\)) X-Mailer: Apple Mail (2.1508) Hi Guys I've got to feed air from a under the spinner to the throttle body. I'm interested in Ram Air but have some questions. 1. What do we do about a bit of rain getting into the system? I gather = ice and snow is a huge problem and some designs have bypasses. 2. I take it that filtering is essential. How does water effect filter = material? What filter material is best. 3. Is there a valve available to purchase to switch between filtered and = non filtered ram air? Cheers Steve Izett =20