Return-Path: Received: from SMTP01.INFOAVE.NET ([165.166.0.26] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 608646 for flyrotary@lancaironline.net; Sat, 15 Jan 2005 20:18:07 -0500 Received-SPF: none receiver=logan.com; client-ip=165.166.0.26; envelope-from=jewen@comporium.net Received: from home1 ([206.74.87.186]) by SMTP00.InfoAve.Net (PMDF V6.2-X31 #30986) with SMTP id <01LJN5WB9Z4Q9BYJWX@SMTP00.InfoAve.Net> for flyrotary@lancaironline.net; Sat, 15 Jan 2005 20:17:27 -0500 (EST) Date: Sat, 15 Jan 2005 20:15:49 -0500 From: Joe Subject: Re: [FlyRotary] Re: IVO Prop To: Rotary motors in aircraft , Dastaten@earthlink.net Message-id: <002201c4fb68$ea33cb50$6432a8c0@home1> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 X-Mailer: Microsoft Outlook Express 6.00.2800.1437 Content-type: multipart/alternative; boundary="----=_NextPart_000_001F_01C4FB3F.013A0EB0" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. ------=_NextPart_000_001F_01C4FB3F.013A0EB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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_001F_01C4FB3F.013A0EB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
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 auto=20 conversion.
 
I believe Tracey felt the reduced = airfoil shape=20 and/or reduced pitch change of the prop root contributed to = his lower=20 top end performance.  I was hoping Tracy would jump into this = discussion=20 and refresh my memory.  If the prop root profile was the cause for = his=20 lower performance, I am estimating this may not have an effect on my = application=20 since I am a pusher and thrust contribution from the root area is likely = to be=20 small.  The only adverse effect this should have is on ground = cooling, but=20 I am planning on exhaust augmenters to assist = cooling. 
 
I appreciate everyone's = comments,
Joe
----- Original Message -----
From:=20 David=20 Staten
Sent: Saturday, January 15, = 2005 7:05=20 PM
Subject: [FlyRotary] Re: IVO = Prop

Wendell Voto wrote:
 
-----=20 Original Message ----- From:=20 Joe=20 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=20 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 a=20 Velocity (or any pusher) with a Lyc. engine.  I suspect that = the wing=20 turbulence is too much for the IVO prop. A Velocity = crashed and=20 lost the whole family a while back using the IVO prop if I = correctly=20 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 some=20 reason and was not torqued properly. While I am no longer a big fan of = IVO, I=20 do believe in casting a fair glance at the product. That crash was = more the=20 result of user error than of an inferior prop. The problem with high = hp=20 lycomings apparently has to do with the power pulses the engine=20 develops.
 
Dave

>>  Homepage:  http://www.flyrotary.com/

>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
------=_NextPart_000_001F_01C4FB3F.013A0EB0--