X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao103.cox.net ([68.230.241.43] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3544691 for flyrotary@lancaironline.net; Wed, 11 Mar 2009 22:14:09 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.43; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao103.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090312021321.RZRB4363.fed1rmmtao103.cox.net@fed1rmimpo01.cox.net> for ; Wed, 11 Mar 2009 22:13:21 -0400 Received: from wills ([68.105.85.56]) by fed1rmimpo01.cox.net with bizsmtp id S2DL1b0061CvZmk032DNGm; Wed, 11 Mar 2009 22:13:22 -0400 X-Authority-Analysis: v=1.0 c=1 a=pcLIrrrKAAAA:8 a=Ia-xEzejAAAA:8 a=7g1VtSJxAAAA:8 a=yJTMrZSzAY5emGR-9TUA:9 a=AqcJJ02iiPdCZ60Mb2EA:7 a=5kNHN-3BU59wkqNGjLnbZrRM-ywA:4 a=8UL1S1SzPDgA:10 a=ftFGBYpk1mUA:10 a=EzXvWhQp4_cA:10 a=fbqX5FOPY1T08Ecp:21 a=_xl2AUjq6PU3draB:21 a=UretUmmEAAAA:8 a=GMXBubaULYYNfjHo8NwA:9 a=yH51aQINIRbGTX1IrKwA:7 a=i1sRUITemAqrTKSqzBd9fIuz6KUA:4 a=AfD3MYMu9mQA:10 a=iVkDmfvjeKcA:10 X-CM-Score: 0.00 Message-ID: <004501c9a2b8$1cf59af0$38556944@wills> From: "Mike Wills" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: IVO Prop Date: Wed, 11 Mar 2009 19:13:19 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0042_01C9A27D.704806B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 This is a multi-part message in MIME format. ------=_NextPart_000_0042_01C9A27D.704806B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Tracy, My RV static RPM is 5350 - 5400 with my Warnke prop which seems pretty = good. This is with a 2.17 ratio RD-1. When the prop unloads in level = flight what should I expect to see for RPM at full power? Max RPM I've = seen in level flight, full throttle, 8,000' was about 5700 - 5800 but I = may not have given things enough time to settle out. What are people = typically setting for cruise RPMs/MP? With the limited flight testing = I've done so far my engine feels pretty comfortable at around 5,000 RPM = and that has been a typical power setting for me to date. Still getting = used to the different sounds and sight picture with the high RPMs and = cheekless cowl. At higher power settings/RPM it feels "busy" - hard to describe and it = may just be a comfort factor thing that I need to get used to. Mike Wills RV-4 N144MW ----- Original Message -----=20 From: Tracy Crook=20 To: Rotary motors in aircraft=20 Sent: Wednesday, March 11, 2009 8:48 AM Subject: [FlyRotary] Re: IVO Prop Yep, should have thought about pushers when I wrote that comment. The = IVO seems to work well on pushers since the stalled inner part of the = blades is in turbulent air and doesn't cost them the drag that it does = on tractors. Tractors are pretty much stuck with high priced variable = pitch stuff like MT to equal the performance of a well matched fixed = pitch prop. What is well matched? If you are running an RD-1B the static rpm = should be 5100 - 5500. With the RD-1C it should be 5900 - 6300 rpm. = If you get less than that, it isn't a well matched prop. This also = assumes that the engine is performing up to par of course. The exact = number depends on what you want to optomize, climb performance or cruise = economy. One more caveat: If you are putting it on a plane with a cruise speed = below ~ 150 MPH, the IVO also works on tractors as well. On my RV-4 the = IVO cut top speed about 15 mph. and around 10 mph from cruise compared = to a well matched fixed pitch prop. Tracy On Wed, Mar 11, 2009 at 12:41 AM, John Slade = wrote: >I didn't know anyone had ever had any success with an IVO. Tell me = more. What do you want to know? Its a very well engineered piece of = equipment. The CF blades are hollow and have a steel rod running to the = hub. Activating the motor via brushes twists the steel and thus twists = the blades equally. The twist change is quite visible. There were = problems with the individual blades slipping on the hub. This has been = solved by providing a knurled hub, and not selling to guys with = Lycomings. The IVO is available for rotary, subaru, Franklin 6 and other = less "pulsy" engines. After the first 15 hours or so my blades have = hardly taken any extra torque. My performance is greatly enhanced compared to the fixed pitch = Performance prop. Static with the wood prop was around 4500. With the = IVO on full fine I get closer to 5400 which gives me access to a lot = more power on take off. I've never done a "high speed" run with the IVO, = but I've had 180 kts indicated at 2000' a few times without much effort, = and without ever going to the full course setting. Another nice bonus is = that throttled back on full fine for landing, the prop acts like a = brake. Its much easier to land and stop than the fixed pitch that's = pushing you along fairly well, even at idle. I know a Velocity driver (Mike Watson) who also uses an IVO = (Franklin 6) and is very happy with it after around 5 years of use. The factory people are very easy to deal with and very helpful. The Cozy Girrrls are installing an IVO. What better recommendation = could you want? :) Regards, John Slade Turbo Rotary Cozy IV, N96PM 98.1 Hrs. Mike Wills wrote: Mike Wills RV-4 N144MW ----- Original Message ----- From: "John Slade" = To: "Rotary motors in aircraft" Sent: Tuesday, March 10, 2009 10:30 AM Subject: [FlyRotary] Re: Ground Testing The IVO electric in-flight adjustable costs around $2350. I'm = very pleased with mine. My "spare" is a $2700 fixed pitch wood prop = thats a piece of art, but doesn't work anywhere near as well. John Tracy Crook wrote: A variable pitch prop would be nice to get the best of both = worlds but it's an expensive option and $10,000 buys a lot of gas. --=20 Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html --=20 Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0042_01C9A27D.704806B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Tracy,
 
 My RV static RPM is 5350 - = 5400 with my=20 Warnke prop which seems pretty good. This is with a 2.17 ratio=20 RD-1. When the prop unloads in level flight what should I expect to = see for=20 RPM at full power? Max RPM I've seen in level flight, full throttle, = 8,000' was=20 about 5700 - 5800 but I may not have given things enough time to settle=20 out. What are people typically setting for cruise RPMs/MP? With the = limited=20 flight testing I've done so far my engine feels pretty comfortable at = around=20 5,000 RPM and that has been a typical power setting for me to date. = Still=20 getting used to the different sounds and sight picture with the high = RPMs and=20 cheekless cowl.
 
 At higher power settings/RPM it = feels "busy"=20 - hard to describe and it may just be a comfort factor thing that I need = to get=20 used to.
 
Mike Wills
RV-4 N144MW
----- Original Message -----
From:=20 Tracy=20 Crook
Sent: Wednesday, March 11, 2009 = 8:48=20 AM
Subject: [FlyRotary] Re: IVO = Prop

Yep, should have thought about pushers when I wrote = that=20 comment.  The IVO seems to work well on pushers since the stalled = inner=20 part of the blades is in turbulent air and doesn't cost them the drag = that it=20 does on tractors.  Tractors are pretty much stuck with high = priced=20 variable pitch stuff like MT to equal the performance of a well = matched=20 fixed pitch prop.

What is well matched?    If you are = running=20 an RD-1B the static rpm should be 5100 - 5500.   With the = RD-1C it=20 should be 5900 - 6300 rpm.    If you get less than = that, it=20 isn't a well matched prop.  This also assumes that the engine is=20 performing up to par of course. The exact number depends on what you = want to=20 optomize, climb performance or cruise economy.

One more = caveat: =20 If you are putting it on a plane with a cruise speed below ~ 150 MPH, = the IVO=20 also works on tractors as well.  On my RV-4 the IVO cut top speed = about=20 15 mph. and around 10 mph from cruise compared to a well matched fixed = pitch=20 prop.

Tracy


On Wed, Mar 11, 2009 at 12:41 AM, John Slade = <sladerj@sbcglobal.net>=20 wrote:
>I=20 didn't know anyone had ever had any success with an IVO. Tell me=20 more.
What do you want to know? Its a very well engineered piece = of=20 equipment. The CF blades are hollow and have a steel rod running to = the hub.=20 Activating the motor via brushes twists the steel and thus twists = the blades=20 equally. The twist change is quite visible. There were problems with = the=20 individual blades slipping on the hub. This has been solved by = providing a=20 knurled hub, and not selling to guys with Lycomings. The IVO is = available=20 for rotary, subaru, Franklin 6 and other less "pulsy" engines. After = the=20 first 15 hours or so my blades have hardly taken any extra = torque.

My=20 performance is greatly enhanced compared to the fixed pitch = Performance=20 prop. Static with the wood prop was around 4500. With the IVO on = full fine I=20 get closer to 5400 which gives me access to a lot more power on take = off.=20 I've never done a "high speed" run with the IVO, but I've had 180 = kts=20 indicated at 2000' a few times without much effort, and without ever = going=20 to the full course setting. Another nice bonus is that throttled = back on=20 full fine for landing, the prop acts like a brake. Its much easier = to land=20 and stop than the fixed pitch that's pushing you along fairly well, = even at=20 idle.

I know a Velocity driver (Mike Watson) who also uses an = IVO=20 (Franklin 6) and is very happy with it after around 5 years of=20 use.

The factory people are very easy to deal with and very=20 helpful.

The Cozy Girrrls are installing an IVO. What better=20 recommendation could you want? :)

Regards,
John = Slade
Turbo=20 Rotary Cozy IV, N96PM
98.1 Hrs.

Mike Wills wrote:


Mike=20 Wills
RV-4 N144MW

----- Original Message ----- From: = "John=20 Slade" <sladerj@sbcglobal.net>
To: "Rotary = motors in=20 aircraft" <flyrotary@lancaironline.net>
Sent: = Tuesday, March=20 10, 2009 10:30 AM
Subject: [FlyRotary] Re: Ground = Testing


The=20 IVO electric in-flight adjustable costs around $2350. I'm very = pleased=20 with mine. My "spare" is a $2700 fixed pitch wood prop thats a = piece of=20 art, but doesn't work anywhere near as = well.
John

Tracy Crook=20 wrote:
A variable pitch prop would be nice to get the best of = both=20 worlds but it's an expensive option and $10,000 buys a lot of=20 gas.



--
Homepage:  http://www.flyrotary.com/
Archive and = UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l




--=20
Homepage:  http://www.flyrotary.com/
Archive and = UnSub:  =20 http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l



--
Homepage:=20  http://www.flyrotary.com/
Archive and UnSub: =   http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l

------=_NextPart_000_0042_01C9A27D.704806B0--