X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: LML Date: Sun, 06 Dec 2009 12:32:22 -0500 Message-ID: X-Original-Return-Path: Received: from mail-fx0-f228.google.com ([209.85.220.228] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTP id 4004809 for lml@lancaironline.net; Sun, 06 Dec 2009 09:48:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.228; envelope-from=keith.smith@gmail.com Received: by fxm28 with SMTP id 28so3663635fxm.5 for ; Sun, 06 Dec 2009 06:47:50 -0800 (PST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=M2xoAqsAe0f+I8g9+v4DqOOH2yOnlIYj3WSFBVPFvtgBQF6WdT5tNf5uCuvF4pdN9F OOdZ4VIswbO11gX5l5liupFbLjoxJ9h79KlK8WeWcl9BFVfNa1HDwzOtpKqLlYuEF3f1 VOAWjp9ZtQv7Ibbdd3Yq3HiDbdj2dp+hjYXXk= MIME-Version: 1.0 Received: by 10.103.81.36 with SMTP id i36mr1742845mul.122.1260110870206; Sun, 06 Dec 2009 06:47:50 -0800 (PST) X-Original-Date: Sun, 6 Dec 2009 09:47:50 -0500 X-Original-Message-ID: <705847490912060647g511be619m4abc15d3c5ae38c6@mail.gmail.com> Subject: basic aerobatics in a 360 From: Keith Smith X-Original-To: Lancair Mailing List Content-Type: text/plain; charset=ISO-8859-1 I'm thinking of doing some relatively basic aerobatics in my 360, basically loops, barrel rolls, and anything else with continuous positive G. The area where I'm a little hazy is any maneuver with brief moments of zero or even -1G. Are these to be COMPLETELY avoided, or is it ok for very brief stints. I'm concerned about the prop and engine. My knowledge of the internals of the engine are weak, but from the little I know, without an inverted oil system, prolonged inverted flight isn't an option. My question is, is 0 to -1G acceptable for 1-2 seconds? I'm thinking here of aileron rolls, or cuban eights. I don't have my heart set on doing those, per se, but just want to know where it would be smart to draw the line. I know the airframe can handle all of that, and then some, it's a question of the engine and prop. Thanks for any advice. Keith N360JH LNC2