Return-Path: Received: from imo22.mx.aol.com ([198.81.17.66]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with ESMTP id AAA13205 for ; Tue, 29 Sep 1998 20:08:01 -0400 Received: from ReganRanch@aol.com by imo22.mx.aol.com (IMOv16.10) id 8BFZa22759 for ; Tue, 29 Sep 1998 20:00:45 +2000 (EDT) From: ReganRanch@aol.com Message-ID: Date: Tue, 29 Sep 1998 20:00:45 EDT To: lancair.list@olsusa.com Subject: Arcing nits to pick X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> In a message dated 98-09-29 00:03:33 EDT, Dan the Diode man writes;) << An interesting comment by Brent Regan that "..capacitors reduce brush arcing in motors...". I believe him to mean that caps reduce noise CAUSED by brush arcing in motors by keeping it localized or grounded. >> I would have said that a capacitor reduces the AC component (and thus the noise) of the arc by supporting current flow during commutation but I am basically a lazy person who strives for economy of work and bandwidth. I have to admit that I have never heard of the brush arc plasma friction effect you mentioned. It does make sense that, at high surface speeds, the brushes would be supported by a hydrodynamic film of air and that the plasma would then be required to support electron flow. Learn something new everyday. Brent