Return-Path: Received: from spdmgaaf.compuserve.com ([149.174.206.139]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-70783U4500L450S0V35) with ESMTP id com for ; Sat, 3 Mar 2001 12:09:56 -0500 Received: (from mailgate@localhost) by spdmgaaf.compuserve.com (8.9.3/8.9.3/SUN-1.9) id MAA29555 for Lancair.list@olsusa.com; Sat, 3 Mar 2001 12:18:48 -0500 (EST) Date: Sat, 3 Mar 2001 12:18:11 -0500 From: James Frantz Subject: Small tail 360 Sender: James Frantz To: Marve Kay Message-ID: <200103031218_MC2-C78F-7119@compuserve.com> X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> >I have been reading up on the trim spring modifications on the small tail 320 and before I started cutting thought I'd ask if any of the short tail 320 pilots thought the springs should really be beefed up or lengthened. thanks,< First a little history. The original trim system for the 360 uses a spring centering system. In the 360 there was not enough trim authority to trim from cruise all the way down to approach speeds hands off. The trim mechanism was a friction lever. With the trim friction set tight enough so it would not slip, it was difficult to get the trim handle to move smoothly. Several builders including myself went to a geared trim system eliminating the trim handle and replacing it with a trim wheel . This system was smooth and positive. However, it was found that the factory centering springs were not strong enough to allow trimming full range with out bottoming. Several builders had batches of stronger springs made up and sold them as a favor. Dick Reichel marketed a trim assembly which included new and stronger springs. There was talk about Lancair retailing his system but I don't know if that ever came about. As I recall Lancair did eventually go to stronger springs. There is a lot of information about elevator trim in the Lancari Network News Archives. Contact Marve for the CD if you don't already have it. A geared trim system with the small tail works great provided the advisories in the LNN are followed. Jim Frantz >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>