X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.netapp.com ([216.240.18.37] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTPS id 4965425 for flyrotary@lancaironline.net; Tue, 03 May 2011 13:07:04 -0400 Received-SPF: none receiver=logan.com; client-ip=216.240.18.37; envelope-from=echristley@att.net X-IronPort-AV: E=Sophos;i="4.64,310,1301900400"; d="scan'208";a="545347355" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx2-out.netapp.com with ESMTP; 03 May 2011 10:06:00 -0700 Received: from [10.62.17.20] ([10.62.17.20]) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id p43H5xSn017104 for ; Tue, 3 May 2011 10:06:00 -0700 (PDT) Message-ID: <4DC035F7.9080607@att.net> Date: Tue, 03 May 2011 13:05:59 -0400 From: Ernest Christley Reply-To: echristley@att.net User-Agent: Thunderbird 2.0.0.24 (X11/20100623) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Oil pickup spacer, pt. II References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit dale.r@cox.net wrote: > Now I have another question. It may be that I just haven't looked in the right places for the information I want, but I can't fathom what's going on with the pickup in the second photo. The reason I made the part on the left of photo 1 was to provide clearance for the four disks that are staked into those recesses. What are they there for? There are four galleys leading from the inside of the center hole to the four recesses. They look rather like freeze plugs, but the physics looks wrong for protecting against overpressure. If I use the spacer on the right, do I induce some risk by blocking those disks? > Pulse dampeners to keep the pump impulses from shaking the pickup tube apart? (That tube is cantilevered out quite a long way.)