X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.25.9.102] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1180300 for flyrotary@lancaironline.net; Fri, 16 Jun 2006 08:58:55 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-111-186.carolina.res.rr.com [24.74.111.186]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id k5GCw9B2028042 for ; Fri, 16 Jun 2006 08:58:10 -0400 (EDT) Message-ID: <002301c69144$a5b62860$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Engine rpm was [FlyRotary] Life without a turbo.... Date: Fri, 16 Jun 2006 08:59:04 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Virus-Scanned: Symantec AntiVirus Scan Engine >> >> Buly, I have no experience with an IVO, but I do want to remind you that >> maximum static rpm does not NECESSARILY mean you are getting adequate >> thrust. I recall one individual who concluded that maximum engine rpm = >> max thrust. He reduce the pitch until he had maximum rpm, unfortunately >> the thrust was just enough to get him airborne, but not enough to >> accelerate to a safe speed. He never gained altitude and impacted a >> cactus with fatal results. >> >> If your prop is set up similar to John's then you have a comparison and >> assuming your bird is similar in weight, etc, then is probably Ok to >> fly. I'd do a few taxi test and if your acceleration feels strong then >> you are probably generating good thrust. >> >> Any other "prop" guys want to advise Buly. >> >> >> Ed >> > > Ed, last night I found information on another Cozy with 6 cylinder Subaru > 230 HP, same reduction ratio and the same prop. > At fine pitch like me, he was getting 4400 rpm and was able to get 2000 > fpm at 80K on take-off. > I fully intend to do fast taxi tests before flying. > Buly > Ok, Buly, sounds like you are in good shape. That guy with the Subaru is not Dwayne is it? Ed