Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Tue, 03 Dec 2002 18:57:51 -0500 Message-ID: X-Original-Return-Path: Received: from sccrmhc01.attbi.com ([204.127.202.61] verified) by logan.com (CommuniGate Pro SMTP 4.0.2) with ESMTP id 1893877 for flyrotary@lancaironline.net; Tue, 03 Dec 2002 18:20:56 -0500 Received: from user (12-231-190-29.client.attbi.com[12.231.190.29]) by sccrmhc01.attbi.com (sccrmhc01) with SMTP id <2002120323205600100runc9e>; Tue, 3 Dec 2002 23:20:56 +0000 X-Original-Message-ID: <007b01c29b22$983049d0$1dbee70c@user> From: "3 rotor" X-Original-To: "Rotary motors in aircraft" References: Subject: Giant Bicycle development-props? X-Original-Date: Tue, 3 Dec 2002 15:20:33 -0800 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 just returned from Thanksgiving in LA with my brother, product development director for Giant Bicycle. He was showing me how they can now take aluminum tubing for frames and blow it into a mold using oil pressure. They even have some tubing with a double internal wall that they can then partially split at one end to form the top tube and diagonal tube all as one piece, very trick looking. The tubes now develop very trick aero shapes, tapered and all. I couldn't help but think that a propellor blade couldn't be made with this same concept. Too bad they don't make prop blades, they make some bikes frames for $3-4 a piece! The CAD systems nowadays compared to what I used to write for McDonnell-Douglas(20 yrs ago) blew me away. A few keystrokes and a round tube insects with a airfloil-shaped tube in seconds. These kids nowadays don't know how easy they have it :-) (what? parametric cubic patch?) kevin