X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from bay0-omc3-s13.bay0.hotmail.com ([65.54.246.213] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1677772 for flyrotary@lancaironline.net; Fri, 15 Dec 2006 09:45:15 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.213; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.82]) by bay0-omc3-s13.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2668); Fri, 15 Dec 2006 06:44:25 -0800 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 15 Dec 2006 06:44:25 -0800 Message-ID: Received: from 4.171.129.111 by BAY115-DAV10.phx.gbl with DAV; Fri, 15 Dec 2006 14:44:21 +0000 X-Originating-IP: [4.171.129.111] 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 Magnum Date: Fri, 15 Dec 2006 09:44:15 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0071_01C7202D.95962250" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.50.0034.2000 Seal-Send-Time: Fri, 15 Dec 2006 09:44:15 -0500 X-OriginalArrivalTime: 15 Dec 2006 14:44:25.0330 (UTC) FILETIME=[84110520:01C72057] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_0071_01C7202D.95962250 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable No real problem, just that it was draggy above 150 mainly due to stalled = portion of airfoil (or lack there-of) in the center 22" of prop = diameter. This resulted in a 15 - 20 mph reduction in cruise and top = speed at the same fuel burn when compared to my Performance Prop (fixed = pitch, wood). Changing the pitch had no effect on this characteristic. = Further evidence of the problem was that engine temps went up at any = given speed due to the stalled prop near the hub. It makes a great test load for my engine test stand though. Tracy (broke down and ordered Blue Mountain auto pilot) ----- Original Message -----=20 From: david mccandless=20 To: Rotary motors in aircraft=20 Sent: Thursday, December 14, 2006 5:32 PM Subject: [FlyRotary] Re: Ivo Magnum Tracey/Bob/Anyone=20 What was the problem over 150 mph? What are you using now? Ref the IVO prop, can you give an opinion on reliability, operation = and any problems or worries. I would like to fit one to my Europa for = speed range 70 to 180 mph, probably on a 13b, if the RB Aluminum Hsgs = work out.=20 BR, Dave McC On 14, Dec , at 10:17 PM, Tracy Crook wrote: I flew the Ivo Magnum (high pitch version) for awhile on my -4 = (ground adjustable only) and tested it at near max pitch (~100"). = Takeoff & climb was OK even though static & climb RPM was limited to = only ~4000 rpm. Flight performance will vary greatly based on the = aircraft & power to weight ratio. The -4 is an overpowered hot rod = compared to factory planes. The same setup on a Cessna 172 might be = marginal at best. Over all, the Ivo was great below 150 mph. Above = that it sucked. Pusher installations seem to have better results with = it (because it blows? : > ) sorry... =20 Tracy ----- Original Message ----- From: Bob Tilley=20 To: Rotary motors in aircraft=20 Sent: Wednesday, December 13, 2006 9:51 PM Subject: [FlyRotary] Ivo Magnum Folks, I had a question concerning the electrically adjustable Ivo, If I = forget to go to fine pitch when landing, what kind of performance = can =20 I expect if I need to do a go around? Just being cautious and = wanting=20 to know beforehand. Is there anyone willing to own up to having = done =20 it already? I'm going to be running a 180 hp 13b in a Cozy MK IV. Bob -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_0071_01C7202D.95962250 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
No real problem, just that it was draggy above 150 mainly due to = stalled=20 portion of airfoil (or lack there-of) in the center 22" of prop = diameter. =20 This resulted in a 15 - 20 mph reduction in cruise and top speed at the = same=20 fuel burn when compared to my Performance Prop (fixed pitch, = wood).  =20 Changing the pitch had no effect on this characteristic.  Further = evidence=20 of the problem was that engine temps went up at any given speed due to = the=20 stalled prop near the hub.
 
It makes a great test load for my engine test stand = though.
 
Tracy  (broke down and ordered Blue Mountain auto pilot)
----- Original Message -----
From: david=20 mccandless
To: Rotary motors in = aircraft
Sent: Thursday, December 14, = 2006 5:32=20 PM
Subject: [FlyRotary] Re: Ivo = Magnum

Tracey/Bob/Anyone
What was the problem over 150 = mph? What=20 are you using now?
Ref the IVO prop, can you give an opinion on=20 reliability, operation and any problems or worries. I would like to = fit one to=20 my Europa for speed range 70 to 180 mph, probably on a 13b, if the RB = Aluminum=20 Hsgs work out.
BR, Dave McC
On 14, Dec , at 10:17 PM, Tracy = Crook=20 wrote:

I flew = the Ivo=20 Magnum (high pitch version) for awhile on my -4 (ground adjustable=20 only) and tested it at near max pitch = (~100").   =20 Takeoff & climb was OK even though static & climb RPM = was=20 limited to only ~4000 rpm.   Flight performance will vary = greatly=20 based on the aircraft & power to weight ratio.  The -4 is = an=20 overpowered hot rod compared to factory planes.  The same setup = on a=20 Cessna 172 might be marginal at best.  Over all, the Ivo was = great=20 below 150 mph.  Above that it sucked.  Pusher = installations seem=20 to have better results with it (because it blows? : > ) = sorry...
 
Tracy
----- Original = Message = -----
From:= =20 Bob = Tilley =
To:=20 Rotary=20 motors in aircraft =
Sent:= =20 Wednesday, December 13, 2006 9:51 = PM
Subject:=20 [FlyRotary] Ivo = Magnum

Folks,

I=20 had a question concerning the electrically adjustable Ivo, If = I 
forget=20 to go to fine pitch when landing, what kind of performance = can 
I=20 expect if I need to do a go around? Just being cautious and = wanting 
to=20 know beforehand. Is there anyone willing to own up to having = done 
it=20 already? I'm going to be running a 180 hp 13b in a Cozy MK = IV.

Bob

--
<= ?param Verdana>Homepage: =20 http://www.flyrotary.com/
Archive=20 and UnSub:   http://mail.lancaironline.net/lists/flyrota= ry/
<= /BLOCKQUOTE>
------=_NextPart_000_0071_01C7202D.95962250--