X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-04.southeast.rr.com ([24.25.9.103] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1310139 for flyrotary@lancaironline.net; Sat, 05 Aug 2006 15:35:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-111-186.carolina.res.rr.com [24.74.111.186]) by ms-smtp-04.southeast.rr.com (8.13.6/8.13.6) with SMTP id k75IuSIT020986 for ; Sat, 5 Aug 2006 14:56:29 -0400 (EDT) Message-ID: <000901c6b8c0$e90fdb80$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] It's officially an airplane Date: Sat, 5 Aug 2006 14:56:50 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C6B89F.61A39860" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C6B89F.61A39860 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hearty congratulations, Al!!! I agree, despite the inevitable? oil temps, sounds like an excellent = first flight. My oil temps went to 240F before I had reached pattern = altitude on my first (abbreviated) flight. You'll fix that in short = order. Looking forward to more reports on performance with a 20B. Ed ----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Saturday, August 05, 2006 10:44 AM Subject: [FlyRotary] It's officially an airplane A high speed nose lift; a high speed crow hop; and finally off and = away around the pattern; the 20B powered Velocity, N755V maid its maiden = flight yesterday, 8/04/06. What an exciting milestone - even though in = this case I was watching from the ground as the test pilot did his = thing. The engine performed well, and the pilot reported that all handling = characteristics were good. The flight was short, however; because the = oil temp was 10-15F higher than the limit I had set, and the pilot did = the right thing in abbreviating the flight so that can be evaluated and = changes made as necessary. All in all, with that as the only issue of = note at this point; it was a good day. It's such a common thing, isn't it - these cooling issues. The oil = temp (downstream from the cooler) peaked at 230F, somewhat after the end = of the climb (OAT about 80F); I guess it takes a little while for the = hot oil to get to the bottom of the 8 qt sump and back through the = cooler. The main concern was that the temp didn't drop more that 3-4 = degrees as he went around the pattern, and after landing and rolling out = it was still 225F. Coolant temps peaked about 190F. I had a video camera mounted reading the engine monitor display which = is great for review later. Unfortunately, even though I have all sorts = of instrumentation for doing diagnostics, in his focusing on flight = characteristics, and the concern about the high oil temp the pilot = forgot to push the 'page up' button; so the only data I have is page 1. = Regardless of further data, it seems clear that there is insufficient = air flow through the wing root oil cooler - a condition that was not = entirely unexpected. Another major step in an on-going process. Al ------=_NextPart_000_0006_01C6B89F.61A39860 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hearty congratulations, Al!!!
 
I agree, despite the inevitable? oil temps, = sounds like an=20 excellent first flight.   My oil temps went to 240F before I = had=20 reached pattern altitude on my first (abbreviated) flight.  You'll = fix that=20 in short order.  Looking forward to more reports on performance = with a=20 20B.
 
Ed
 
 
----- Original Message -----
From:=20 Al = Gietzen=20
Sent: Saturday, August 05, 2006 = 10:44=20 AM
Subject: [FlyRotary] It's = officially an=20 airplane

A high speed nose = lift; a high=20 speed crow hop; and finally off and away around the pattern; the 20B = powered=20 Velocity, N755V maid its maiden flight yesterday, 8/04/06.  What an = exciting=20 milestone =96 even though in this case I was watching from the ground = as the=20 test pilot did his thing.

 

The engine performed = well, and=20 the pilot reported that all handling characteristics were good. =  The=20 flight was short, however; because the oil temp was 10-15F higher than = the=20 limit I had set, and the pilot did the right thing in abbreviating the = flight=20 so that can be evaluated and changes made as necessary.  All in = all, with=20 that as the only issue of note at this point; it was a good=20 day.

 

It=92s such a common = thing, isn=92t=20 it =96 these cooling issues.  The oil temp (downstream from the = cooler)=20 peaked at 230F, somewhat after the end of the climb (OAT about 80F); I = guess=20 it takes a little while for the hot oil to get to the bottom of the 8 = qt sump=20 and back through the cooler.  The main concern was that the temp = didn=92t=20 drop more that 3-4 degrees as he went around the pattern, and after = landing=20 and rolling out it was still 225F.  Coolant temps peaked about=20 190F.

 

I had a video camera = mounted=20 reading the engine monitor display which is great for review later.=20  Unfortunately, even though I have all sorts of instrumentation = for doing=20 diagnostics, in his focusing on flight characteristics, and the = concern about=20 the high oil temp the pilot forgot to push the =91page up=92 button; = so the only=20 data I have is page 1.  Regardless of further data, it seems = clear that=20 there is insufficient air flow through the wing root oil cooler =96 a = condition=20 that was not entirely unexpected.

 

Another major step in = an=20 on-going process.

 

Al

 

 

 

 

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