Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Sun, 13 Oct 2002 19:22:43 -0400 Message-ID: X-Original-Return-Path: Received: from bree.pipcom.com ([204.92.62.3] verified) by logan.com (CommuniGate Pro SMTP 4.0b9) with SMTP id 1804491 for flyrotary@lancaironline.net; Sun, 13 Oct 2002 08:59:48 -0400 Received: (qmail 14785 invoked from network); 13 Oct 2002 12:59:53 -0000 Received: from ras3-9.pipcom.com (HELO new) (204.92.62.141) by bree.pipcom.com with SMTP; 13 Oct 2002 12:59:53 -0000 X-Original-Message-ID: <000e01c272b8$32cdeb20$5ed9fea9@new> From: "Peter Cowan" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: chordwise balancing X-Original-Date: Sun, 13 Oct 2002 08:57:35 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 > I machined a cone in a dowl that is a light press fit in the center hole of > the prop. I then ballance the prop on a pointed rod (held vertical in a > vise) in the center of the machined cone. > > A sensitive round bubble level (like those on a transit) indicates the > direction and amount of imballance. I use weights rivited to the spinner > backing plate to ballance the whole assembly. > > Tracy So does the flat surface of the cone get pressed in past the surface of the prop so that the point of contact is inside the hole to give some stability? Thanks for clarifying this Peter