X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wr-out-0506.google.com ([64.233.184.230] verified) by logan.com (CommuniGate Pro SMTP 5.1.11) with ESMTP id 2240733 for flyrotary@lancaironline.net; Fri, 03 Aug 2007 16:16:06 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.230; envelope-from=msteitle@gmail.com Received: by wr-out-0506.google.com with SMTP id 58so854331wri for ; Fri, 03 Aug 2007 13:15:29 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=GTyt9QV+7DR0/F/LN5ViG5uRNS8xOCN6abGPP4DqMWdN8X3AvPlqNs2ER/SqFibNyMj1WbD8LyejpaRq25kVo/iu3lSTwX5k6SAjgSShZoVLqwu8PYpraYzwfR5XvydGl1ftOH/Evv98F/PLgGwK08t4vWQFKp53u9/tXUXLv4g= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=N93hMlV+3hm7Wh9sFa+biyqp3XfiNWcu2NAZ82w2wLpfepXtTnmwPNCwO1C7MSQ/6br3IiL0EKYfNQey0mk6Ke+sstBHUdj8/pit3jrc7cxYbt0y1gusf9ghmVt/Dpt1F72nXdIQGLvfnz+HXioEls91Bql9HuyURsolJAt9c4A= Received: by 10.90.80.8 with SMTP id d8mr3567888agb.1186172129500; Fri, 03 Aug 2007 13:15:29 -0700 (PDT) Received: by 10.90.115.6 with HTTP; Fri, 3 Aug 2007 13:15:29 -0700 (PDT) Message-ID: <5cf132c0708031315o458ba7bdqa2655906cd42023d@mail.gmail.com> Date: Fri, 3 Aug 2007 15:15:29 -0500 From: "Mark Steitle" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Tips on tuning In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_80942_8020938.1186172129384" References: ------=_Part_80942_8020938.1186172129384 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On 8/3/07, Al Gietzen wrote: Al, I think Chris B. brought this up earlier today. I didn't respond, but you mentioned it, so then couldn't resist the urge to comment. To refresh everyone's memory, I have a 20B with a 76" 3-blade constant-speed M/T prop. So, I can dial in the prop speed desired and the prop controller does the rest. With it set to 2500 rpm, I'm seeing 7000 engine rpm on takeoff rolls. (What a sweet sound! It makes those Lycosaurus' sound like farm tractors.) It will turn about 6700 - 6800 during static runups. But this is a c/s prop, so your mileage may vary. Mark S. > > > I have found that with my 66" dia =96 80" pitch prop my Velocity doesn't > move until engine rpm is somewhere upward of 1500 rpm. > > > > I get about 5500 static with my 20B, and about 5600 on takeoff. With > adjustable pitch you will want to get some higher numbers. > > > > Hope you find this helpful, > > > > Al > > > ------=_Part_80942_8020938.1186172129384 Content-Type: text/html; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline

On 8/3/07, A= l Gietzen <ALVentures@cox.net<= /a>> wrote:

Al,

I think Chris B. brought this up earlier today. I didn= 't respond, but you mentioned it, so then couldn't resist the = urge to comment. To refresh everyone's memory, I have a= 20B with a 76" 3-blade constant-speed M/T prop. So, I can = dial in the prop speed desired and the prop controller does the r= est. With it set to 2500 rpm, I'm seeing 7000 engine rpm&nbs= p;on takeoff rolls. (What a sweet sound! It makes those Lycosau= rus' sound like farm tractors.) It will turn about 6700 - 6800 du= ring static runups. But this is a c/s prop, so your mileage = ;may vary.

Mark S.

<= /span>

I have found that with my 66" d= ia =96 80" pitch prop my Velocity doesn't move until engine rpm is somewh= ere upward of 1500 rpm.

I get about 5500 static with my= 20B, and about 5600 on takeoff. With adjustable pitch you will want = to get some higher numbers.

Hope you find this helpful,

Al

<= /span>

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