X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from EXHUB003-4.exch003intermedia.net ([207.5.74.111] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTPS id 3841052 for flyrotary@lancaironline.net; Tue, 08 Sep 2009 10:16:19 -0400 Received-SPF: none receiver=logan.com; client-ip=207.5.74.111; envelope-from=jwhaley@datacast.com Received: from EXVMBX003-5.exch003intermedia.net ([207.5.74.45]) by EXHUB003-4.exch003intermedia.net ([207.5.74.111]) with mapi; Tue, 8 Sep 2009 07:15:43 -0700 From: Jeff Whaley To: Rotary motors in aircraft Date: Tue, 8 Sep 2009 07:15:44 -0700 Subject: RE: [FlyRotary] Re: At long last, Second Flight Thread-Topic: [FlyRotary] Re: At long last, Second Flight Thread-Index: AcowGTCGB6qUDpjWQfS1AEtsCFLp4QAdOL6A Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0E0153601FD6D5EXVMBX0035e_" MIME-Version: 1.0 --_000_C03ABB0A7362B84BB53D544B3C305E0E0153601FD6D5EXVMBX0035e_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Tracy, great news and congrats on the first 2 flights. Thanks for "flyi= ng what you sell" and for making those components available to the rest of = us! Turning resistance when hot - well I don't have the 20B, but I find that my= 13B is also harder to turn (perhaps increased compression?) when hot Vs co= ld - I thought/hoped this was normal ... Jeff From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Tracy Crook Sent: Monday, September 07, 2009 8:12 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: At long last, Second Flight After plugging the connection to the EFIS1 Pitot port I made another flight= today. The OAT was about 8 degrees cooler so - surprise - my oil & coola= nt temps were about 8 degrees cooler too. That and a working ASI made this= flight a lot more comfortable. I did collect a little more data this time but now I really see the value o= f data logging. Back on the ground I constantly find myself wishing I had= written down a different sensor reading under a different condition. The air temps I'm measuring under the cowl are much hotter than I want to s= ee, probably due to insufficient CFM of cooling air. I haven't measured th= e pressure recovery in my diffusers but indications are that they aren't go= ing to be what I was hoping for. Either that or the pressure under the cow= l is much too high. Always in need of more data. Next flight will be mad= e with the dynamic pressure port probe in place under the cowl. I'm still a little concerned about the high turning resistance of my 20B en= gine when hot. When cool, it feels normal. This has not changed in 14 hou= rs of engine run time. Any of you other 20B users notice anything like th= is. Is there any significant difference in the way the engine feels when p= ulling the prop through when hot and cold? Tracy --_000_C03ABB0A7362B84BB53D544B3C305E0E0153601FD6D5EXVMBX0035e_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Tracy, great news and congrats on the first 2 flights.&nb= sp; Thanks for “flying what you sell” and for making those componen= ts available to the rest of us!

Turning resistance when hot – well I don’t have = the 20B, but I find that my 13B is also harder to turn (perhaps increased compression?) wh= en hot Vs cold – I thought/hoped this was normal …

Jeff

From: Rotary motors= in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Cro= ok
Sent: Monday, September 07, 2009 8:12 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: At long last, Second Flight

After plugging the connection to the EFIS1 Pitot port = I made another flight today. The OAT was about 8 degrees cooler so - surprise - my oil & coolant temps were about 8 degrees cooler too. That and a working ASI made this flight a lot more comfortable.<= br>
I did collect a little more data this time but now I really see the value o= f data logging. Back on the ground I constantly find myself wishing I = had written down a different sensor reading under a different condition.

The air temps I'm measuring under the cowl are much hotter than I want to s= ee, probably due to insufficient CFM of cooling air. I haven't measured t= he pressure recovery in my diffusers but indications are that they aren't goin= g to be what I was hoping for. Either that or the pressure under the cowl = is much too high. Always in need of more data. Next flight will b= e made with the dynamic pressure port probe in place under the cowl.

I'm still a little concerned about the high turning resistance of my 20B en= gine when hot. When cool, it feels normal. This has not changed in 1= 4 hours of engine run time. Any of you other 20B users notice anything like this. Is there any significant difference in the way the engine = feels when pulling the prop through when hot and cold?

Tracy

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