X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from py-out-1112.google.com ([64.233.166.176] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1310665 for flyrotary@lancaironline.net; Sun, 06 Aug 2006 04:30:47 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.166.176; envelope-from=bartrim@gmail.com Received: by py-out-1112.google.com with SMTP id c31so824583pyd for ; Sun, 06 Aug 2006 01:30:01 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:references:in-reply-to:subject:date:message-id:mime-version:content-type:x-mailer:thread-index:content-language; b=pz65/tA7gEaxMPNArMsslrnM6vqPNyBzEopT+rEfIZ4kBj7XY7NgLkzN5M5EV8K4It7tQq8JusgdWt3Wg1Yca0dZQXcMrgaMtUiTAsgIEm2MNOAstPIFJodPQWZHGFIM0wIMfZ0M26lMSUmv/zPkt1IUnDW+gjP0sZSm/dLu4BU= Received: by 10.35.37.18 with SMTP id p18mr9234707pyj; Sun, 06 Aug 2006 01:30:01 -0700 (PDT) Return-Path: Received: from Endurance ( [154.20.245.217]) by mx.gmail.com with ESMTP id 22sm1822150nzn.2006.08.06.01.29.59; Sun, 06 Aug 2006 01:30:01 -0700 (PDT) From: "Todd Bartrim" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] It's officially an airplane Date: Sun, 6 Aug 2006 01:29:58 -0700 Message-ID: <002701c6b932$81b34270$8519c750$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0028_01C6B8F7.D5546A70" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Aca4nciC5/f3fVc9Rb6IFwvZlz/YeQAlGffg Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0028_01C6B8F7.D5546A70 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Congrats Al; Very satisfying to watch your own creation take flight. Send pics. S. Todd Bartrim C-FSTB Turbo13B RV9 http://members.cox.net/rogersda/rotary/configs.htm#C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Saturday, August 05, 2006 7:45 AM To: Rotary motors in aircraft 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_0028_01C6B8F7.D5546A70 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Congrats Al;

         &nbs= p;      Very satisfying to watch your own creation take flight. Send = pics.

S. Todd Bartrim

C-FSTB

Turbo13B = RV9

http:/= /members.cox.net/rogersda/rotary/configs.htm#C-FSTB=

http://www3.telus.net/haywire/RV-9/C-FSTB.htm

 

 

 

From: Rotary = motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al = Gietzen
Sent: Saturday, August 05, 2006 7:45 AM
To: Rotary motors in aircraft
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_0028_01C6B8F7.D5546A70--