X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm22-vm0.access.bullet.mail.mud.yahoo.com ([66.94.236.137] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with SMTP id 5080924 for flyrotary@lancaironline.net; Wed, 03 Aug 2011 15:13:50 -0400 Received-SPF: none receiver=logan.com; client-ip=66.94.236.137; envelope-from=ceengland@bellsouth.net Received: from [66.94.237.199] by nm22.access.bullet.mail.mud.yahoo.com with NNFMP; 03 Aug 2011 19:13:14 -0000 Received: from [66.94.237.121] by tm10.access.bullet.mail.mud.yahoo.com with NNFMP; 03 Aug 2011 19:13:14 -0000 Received: from [127.0.0.1] by omp1026.access.mail.mud.yahoo.com with NNFMP; 03 Aug 2011 19:13:14 -0000 X-Yahoo-Newman-Id: 620317.74891.bm@omp1026.access.mail.mud.yahoo.com Received: (qmail 22001 invoked from network); 3 Aug 2011 19:13:14 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bellsouth.net; s=s1024; t=1312398794; bh=he/Bn0mNOjFDigcVm03/s38hvkn32I+uTGS/Lw3OO8Q=; h=X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type; b=5e2C2IJi99iXlZLmZsHu4BnpbI924mkKQj/+wZj6iB9PLRLU2KQ3Eh8V+J72XXR7eXEZo9Xl3ihzV89qaGLRqNu+11mknvB0TjykrL/kDyeLag0Iu2xxAJcFzOq5ISOyrOvmRIJ0VXOuaK3jh1ATe6Ijy6NXv86MIkN/yPBGCRM= X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: V0HJH1AVM1mZd4FpsvNsahGr6VA7DzzueZ.tK_2iTWZMndZ LOxYvKnKcYU3tdrOsS92v08cpI5LIXYbqlpNSeoos80GhCrrO.AIWk9kf2SF GvP3THsA19_R4zrNN3OxM_fDbnJqkyEGsEEzgWu1JuRVWq2u0eMezlrRM9Hi aC2ipx2BGltNAluS_v.de94pzuXIZQYMxiytSC0II00bwoKjWlq07CVFB7s5 PFbkFJDPGyOBbTFby89_1pGp9z6SXBNEdmFzkld8ZIts5r.ez.zXHVbKpJTc aF89oUFWtR3iWnXq9PlrbvOaIhuNNm4yInOkuwQkbJnIfHGkwD.X9QFo0Icv V.P0c8XRSojekyze3WQa93M7j7A-- X-Yahoo-SMTP: uXJ_6LOswBCr8InijhYErvjWlJuRkoKPGNeiuu7PA.5wcGoy Received: from [192.168.10.14] (ceengland@74.240.19.252 with plain) by smtp111.sbc.mail.mud.yahoo.com with SMTP; 03 Aug 2011 12:13:14 -0700 PDT Message-ID: <4E399DC9.6090600@bellsouth.net> Date: Wed, 03 Aug 2011 14:13:13 -0500 From: Charlie England User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.18) Gecko/20110617 Thunderbird/3.1.11 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: PSRU References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080000070900050404000608" This is a multi-part message in MIME format. --------------080000070900050404000608 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Here's one: I tried one & got the same results as Tracy, compared to a regular wood fixed pitch prop. Charlie RV-4, 160 HP Lyc. On 08/02/2011 04:58 PM, Samuel Treffinger wrote: > Do you know of any online articles showing this to be true??? > > Sent from my iPhone > > On Aug 2, 2011, at 4:44 PM, Pat Panzera > > wrote: > >> It's not just stalled, portions of it is actually creating negative >> thrust and the portions that are not contributing to thrust are >> creating drag on the engine. >> >> On Mon, Aug 1, 2011 at 4:57 AM, Tracy > > wrote: >> >> No negative effects that I know of. I used one for awhile on my >> RV-4 but was not happy with it's efficiency at high speed. >> Worked great for takeoff & climb but area near hub was stalled >> and draggy at cruise & high speed. >> >> Works better on canards because that area is in turbulent air anyway. >> >> Tracy >> >> >> On Mon, Aug 1, 2011 at 1:48 AM, Samuel Treffinger >> > > wrote: >> >> Tracy, do you know of any negative side affects of using a >> IVO magnum inflight adjustable prop with your psru?? I think >> John Slade has that configuration, but I was wondering if you >> reccommended it, or reccommended against it. >> Sam >> >> >> --------------080000070900050404000608 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Here's one: I tried one & got the same results as Tracy, compared to a regular wood fixed pitch prop.

Charlie
RV-4, 160 HP Lyc.

On 08/02/2011 04:58 PM, Samuel Treffinger wrote:
Do you know of any online articles showing this to be true???

Sent from my iPhone

On Aug 2, 2011, at 4:44 PM, Pat Panzera <editor.contactmagazine@gmail.com> wrote:

It's not just stalled, portions of it is actually creating negative thrust and the portions that are not contributing to thrust are creating drag on the engine. 

On Mon, Aug 1, 2011 at 4:57 AM, Tracy <rwstracy@gmail.com> wrote:
No negative effects that I know of.   I used one for awhile on my RV-4 but was not happy with it's efficiency at high speed.   Worked great for takeoff & climb but area near hub was stalled and draggy at cruise & high speed.

Works better on canards because that area is in turbulent air anyway.

Tracy


On Mon, Aug 1, 2011 at 1:48 AM, Samuel Treffinger <samuel.treffinger@gmail.com> wrote:
Tracy, do you know of any negative side affects of using a IVO magnum inflight adjustable prop with your psru?? I think John Slade has that configuration, but I was wondering if you reccommended it, or reccommended against it.
 
Sam



--------------080000070900050404000608--