Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 30 Apr 2002 13:43:10 -0400 Message-ID: X-Original-Return-Path: Received: from mailrelay.udlp.com ([207.109.1.10] verified) by logan.com (CommuniGate Pro SMTP 3.5.9) with ESMTP id 1203832 for lml@lancaironline.net; Mon, 29 Apr 2002 21:19:43 -0400 Received: from asdmngwia.mpls.udlp.com (asdmngwia.mpls.udlp.com [10.1.62.22]) by mailrelay.udlp.com (8.11.4/8.11.4) with ESMTP id g3U1JQi29429 for ; Mon, 29 Apr 2002 20:19:27 -0500 Received: from DM-MN-06-MTA by asdmngwia.mpls.udlp.com with Novell_GroupWise; Mon, 29 Apr 2002 20:19:21 -0500 X-Original-Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.1 X-Original-Date: Mon, 29 Apr 2002 20:19:03 -0500 From: "Christopher Zavatson" X-Original-To: Subject: prop balancing Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline I am looking for the definition of "ips" (in/sec) as used to describe the state of a propeller balance/imbalance. This definition may also apply to rotating machinery in general. I used plots of acceleration of my engine/prop to achieve a better dynamic balance. The plots were produced using an accelerometer and scope . I would like to convert my results to industry standard units for the sake of comparison with typically obtained values using commercial balancers. Some guesses for the definition are: RMS value of velocity or peak velocity??? Chris Zavatson N91CZ std 360