Return-Path: Received: from [65.54.169.57] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 611620 for flyrotary@lancaironline.net; Tue, 18 Jan 2005 11:29:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.169.57; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 18 Jan 2005 08:29:03 -0800 Message-ID: Received: from 65.54.98.16 by BAY3-DAV27.phx.gbl with DAV; Tue, 18 Jan 2005 16:28:00 +0000 X-Originating-IP: [65.54.98.16] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: IVO Prop Date: Tue, 18 Jan 2005 11:27:58 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0110_01C4FD50.C3263A90" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0009.2900 Seal-Send-Time: Tue, 18 Jan 2005 11:27:58 -0500 X-OriginalArrivalTime: 18 Jan 2005 16:29:03.0991 (UTC) FILETIME=[D2EEA870:01C4FD7A] This is a multi-part message in MIME format. ------=_NextPart_000_0110_01C4FD50.C3263A90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Been gone a few days for the Lakeland RV fly-in. Ed Andersen just = departed here (Shady Bend) on his way back home. =20 Yes, the IVO problem on my plane was mainly related to drag around the = hub area. Worked like gangbusters up to around 140 mph then started = hurting performance. Tracy ----- Original Message -----=20 From: Joe=20 To: Rotary motors in aircraft=20 Sent: Saturday, January 15, 2005 8:15 PM Subject: [FlyRotary] Re: IVO Prop The IVO/Velocity accident I am aware of was attributed primarily to = not following the recommended torque procedures. IVO no longer sells to = applications that have large power pulses such as those put out by a = Lycoming. That is part of the reason I am using an auto conversion. I believe Tracey felt the reduced airfoil shape and/or reduced pitch = change of the prop root contributed to his lower top end performance. I = was hoping Tracy would jump into this discussion and refresh my memory. = If the prop root profile was the cause for his lower performance, I am = estimating this may not have an effect on my application since I am a = pusher and thrust contribution from the root area is likely to be small. = The only adverse effect this should have is on ground cooling, but I am = planning on exhaust augmenters to assist cooling.=20 I appreciate everyone's comments, Joe ----- Original Message -----=20 From: David Staten=20 To: Rotary motors in aircraft=20 Sent: Saturday, January 15, 2005 7:05 PM Subject: [FlyRotary] Re: IVO Prop Wendell Voto wrote: ----- Original Message -----=20 From: Joe=20 To: Rotary motors in = aircraft=20 Sent: Saturday, January 15, 2005 9:56 AM Subject: [FlyRotary] IVO Prop Does anyone have any experience or opinions using an IVO Magnum = Inflight Adjustable prop with a rotary? I am considering the IVO for = use with my Velocity / Renesis and would appreciate any coments. Thanks, Joe Joe, don't know how the IVO prop is with the rotary engine, but = it definitely is not recommended for a Velocity (or any pusher) with a = Lyc. engine. I suspect that the wing turbulence is too much for the IVO = prop. A Velocity crashed and lost the whole family a while back using = the IVO prop if I correctly remember. My 2 cents. Wendell Hang on... The velocity crash if I remember the story correctly was = the result of not using the right tools and procedures. The prop was = disassembled/reassembed for some reason and was not torqued properly. = While I am no longer a big fan of IVO, I do believe in casting a fair = glance at the product. That crash was more the result of user error than = of an inferior prop. The problem with high hp lycomings apparently has = to do with the power pulses the engine develops. =20 Dave >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0110_01C4FD50.C3263A90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Been gone a few days for the Lakeland RV fly-in.  Ed Andersen = just=20 departed here (Shady Bend) on his way back home. 
 
Yes, the IVO problem on my plane was mainly related to drag around = the hub=20 area.  Worked like gangbusters up to around 140 mph then started = hurting=20 performance.
 
Tracy
----- Original Message -----
From: Joe
To: Rotary motors in = aircraft
Sent: Saturday, January 15, = 2005 8:15=20 PM
Subject: [FlyRotary] Re: IVO = Prop

The IVO/Velocity accident I am aware = of was=20 attributed primarily to not following the recommended torque = procedures. =20 IVO no longer sells to applications that have large power pulses = such as=20 those put out by a Lycoming.  That is part of the reason I am = using an=20 auto conversion.
 
I believe Tracey felt the reduced = airfoil shape=20 and/or reduced pitch change of the prop root contributed to = his=20 lower top end performance.  I was hoping Tracy would jump into = this=20 discussion and refresh my memory.  If the prop root profile was = the cause=20 for his lower performance, I am estimating this may not have an effect = on my=20 application since I am a pusher and thrust contribution from the root = area is=20 likely to be small.  The only adverse effect this should have is = on=20 ground cooling, but I am planning on exhaust augmenters to assist=20 cooling. 
 
I appreciate everyone's = comments,
Joe
----- Original Message -----
From:=20 David Staten
To: Rotary motors in = aircraft=20
Sent: Saturday, January 15, = 2005 7:05=20 PM
Subject: [FlyRotary] Re: IVO = Prop

Wendell Voto wrote:
 
-----=20 Original Message ----- From:=20 Joe To:=20 Rotary motors in = aircraft=20 Sent:=20 Saturday, January 15, 2005 9:56 AM Subject:=20 [FlyRotary] IVO Prop

Does anyone have any experience = or opinions=20 using an IVO Magnum Inflight Adjustable prop with a = rotary?  I am=20 considering the IVO for use with my Velocity / Renesis and would = appreciate any coments.
 
Thanks,
Joe
 
Joe, don't know = how the IVO=20 prop is with the rotary engine, but it definitely is not = recommended for=20 a Velocity (or any pusher) with a Lyc. engine.  I suspect = that the=20 wing turbulence is too much for the IVO prop. A = Velocity=20 crashed and lost the whole family a while back using the IVO = prop if I=20 correctly remember.  My 2 cents.
Wendell

Hang = on... The=20 velocity crash if I remember the story correctly was the result of = not using=20 the right tools and procedures. The prop was disassembled/reassembed = for=20 some reason and was not torqued properly. While I am no longer a big = fan of=20 IVO, I do believe in casting a fair glance at the product. That = crash was=20 more the result of user error than of an inferior prop. The problem = with=20 high hp lycomings apparently has to do with the power pulses the = engine=20 develops.
 
Dave

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