X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc12.worldnet.att.net ([204.127.131.116] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 920137 for flyrotary@lancaironline.net; Tue, 10 Jan 2006 09:17:56 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.131.116; envelope-from=keltro@att.net Received: from 204.127.135.75 ([204.127.135.75]) by worldnet.att.net (mtiwmhc12) with SMTP id <2006011014132311200272ure>; Tue, 10 Jan 2006 14:13:33 +0000 Received: from [64.136.27.229] by 204.127.135.75; Tue, 10 Jan 2006 14:13:22 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: A report on the IVO prop Date: Tue, 10 Jan 2006 14:13:22 +0000 Message-Id: <011020061413.23914.43C3C101000B8E4200005D6A2160466648019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Nov 10 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_23914_1136902402_0" --NextPart_Webmail_9m3u9jl4l_23914_1136902402_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit John, What diameter is your "IVO" and are the blades the "HI PITCH" (45-105") ? Thanks, -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "John Slade" : -------------- > Rotary people; > I'm really starting to like this IVO prop. The prop is very smooth > (noticeably smoother and quieter than the Performance 3 blade) and the pitch > adjustment makes a dramatic difference. Take-off is much shorter now and > the climb keeps getting me too close to the Cessnas that took off 5 minutes > ago. > > Today my take-off was proceeding normally - then I glanced at the boost > level. MAP was only 34. Hmmm. I gave her a bit more throttle, took the boost > to around 38 and she surged forward as though someone lit a rocket on the > back. Wha hoooo! This is the best performance I've ever had, and then some, > and there's a lot more left that I'm not using. > > Cruising out of the pattern at just below max fine pitch I was doing around > 130 kts with 5000 rpm. Once at 3000' I coarsened the pitch for about 3 > seconds. (It takes 14 seconds to go from one limit to the other). RPM went > down to 4500, speed went up to 140 and I felt a pleasant push in my back. > OK. I brought the rpm back up to 5000. Speed went up to 150. Hmmm. This is > interesting. I went through the cycle again and things changed by about the > same proportions. I pretty sure I had quite a bit more adjustment to go on > the prop, and I didn't take the engine over 5600 rpm, but I was now reading > 175kts TAS (170 averaged for wind) at 5600 rpm and only 34 map. Wow. I feels > like I finally found fifth gear after driving in fourth for two years. I > can't wait to find out what 6100 rpm at 12000' and 46 MAP will get me. Not > far short of orbital escape velocity and a long way past VNE would be my > guess. Unfortunately this won't happen until I have my new T04 turbo > installed. > > I'll report more number on the IVO when I have them. Right now I'm having > way too much fun to take notes. :) > > John > 48.3 hrs, and finally getting what I'd hoped for. --NextPart_Webmail_9m3u9jl4l_23914_1136902402_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

John,

What diameter is your "IVO" and are the blades the "HI PITCH" (45-105") ?

Thanks,

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from "John Slade" <sladerj@bellsouth.net>: --------------

> Rotary people;
> I'm really starting to like this IVO prop. The prop is very smooth
> (noticeably smoother and quieter than the Performance 3 blade) and the pitch
> adjustment makes a dramatic difference. Take-off is much shorter now and
> the climb keeps getting me too close to the Cessnas that took off 5 minutes
> ago.
>
> Today my take-off was proceeding normally - then I glanced at the boost
> level. MAP was only 34. Hmmm. I gave her a bit more throttle, took the boost
> to around 38 and she surged forward as though someone lit a rocket on the
> back. Wha hoooo! This is the best performance I've ever had, and then some,
> and there's a lot more left that I'm not using.
>
> Cruising out of the pattern at just below max fine pitch I was doing around
> 130 kts with 5000 rpm. Once at 3000' I coarsened the pitch for about 3
> seconds. (It takes 14 seconds to go from one limit to the other). RPM went
> down to 4500, speed went up to 140 and I felt a pleasant push in my back.
> OK. I brought the rpm back up to 5000. Speed went up to 150. Hmmm. This is
> interesting. I went through the cycle again and things changed by about the
> same proportions. I pretty sure I had quite a bit more adjustment to go on
> the prop, and I didn't take the engine over 5600 rpm, but I was now reading
> 175kts TAS (170 averaged for wind) at 5600 rpm and only 34 map. Wow. I feels
> like I finally found fifth gear after driving in fourth for two years. I
> can't wait to find out what 6100 rpm at 12000' and 46 MAP will get me. Not
> far short of orbital escape velocity and a long way past VNE would be my
> guess. Unfortunately this won't happen until I have my new T04 turbo
> installed.
>
> I'll report more number on the IVO when I have them. Right now I'm having
> way too much fun to take notes. :)
>
> John
> 48.3 hrs, and finally getting what I'd hoped for.

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