Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Mon, 14 Apr 2003 00:38:47 -0400 Message-ID: X-Original-Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.93.67.82] verified) by logan.com (CommuniGate Pro SMTP 4.1b3) with ESMTP id 2121553 for flyrotary@lancaironline.net; Sun, 13 Apr 2003 22:20:20 -0400 Received: from mail3.carolina.rr.com (fe3 [24.93.67.50]) by ms-smtp-01.southeast.rr.com (8.12.5/8.12.2) with ESMTP id h3E2FthC022354 for ; Sun, 13 Apr 2003 22:15:56 -0400 (EDT) Received: from o7y6b5 ([24.93.78.62]) by mail3.carolina.rr.com with Microsoft SMTPSVC(5.5.1877.757.75); Sun, 13 Apr 2003 22:17:45 -0400 X-Original-Message-ID: <001501c3022d$67b7f9c0$1702a8c0@WorkGroup> From: "Ed Anderson" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Heavy Load +Stalled Prop+Wet Grass = Long Roll & damaged seat cushion X-Original-Date: Sun, 13 Apr 2003 22:27:33 -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 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Good point, David No, until recently the engine did not produce enough power to stall the prop. Tracy Crook and I both agree that after rebuild of a rotary engine, they seem to continue to improve for a considerable amount of time - Tracy estimates around 250 hours before they stop improving. In any case, it only happens when cold dense air is present, so had not normally had to worry about the stalled prop. However, your suggested procedure certainly makes sense and would not be a bad procedure to get into the habit of. I suspect that once the aircraft is rolling around 20-40 mph that the prop could then take more power without stalling. But, the LAEV prop would really be great - then I could put the additional power to good use with a flatter pitch for take off acceleration and climb. Oh, well. Ed ----- Original Message ----- From: "David Leonard" To: "Rotary motors in aircraft" Sent: Sunday, April 13, 2003 5:23 PM Subject: [FlyRotary] Re: Heavy Load +Stalled Prop+Wet Grass = Long Roll & damaged seat cushion > Ed, Have you ever considered gradually advancing the throttle on all > your take-offs so the prop always remains in the un-stalled region? > With practice, I'm sure that keeping the power at max un-stalled rpm > would soon become second nature. > > All hail the LAEV prop. :-) > > David Leonard > The Rotary Roster: > http://members.aol.com/_ht_a/rotaryroster/index.html > > > > >> Homepage: http://www.flyrotary.com/