X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from willowsprings.uwyo.edu ([129.72.10.31] verified) by logan.com (CommuniGate Pro SMTP 5.4c2) with ESMTPS id 4913012 for flyrotary@lancaironline.net; Sun, 20 Mar 2011 20:07:53 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.31; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht1.uwyo.edu (ponyexpress-ht1.uwyo.edu [10.84.60.208]) by willowsprings.uwyo.edu (8.14.4/8.14.4) with ESMTP id p2L07HJ0020552 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Sun, 20 Mar 2011 18:07:17 -0600 (MDT) (envelope-from SBoese@uwyo.edu) Received: from ponyexpress-mb5.uwyo.edu ([fe80::9813:248c:2d68:a28b]) by ponyexpress-ht1 ([10.84.60.208]) with mapi; Sun, 20 Mar 2011 18:07:17 -0600 From: "Steven W. Boese" To: Rotary motors in aircraft Date: Sun, 20 Mar 2011 18:06:59 -0600 Subject: RE: [FlyRotary] Re: On the subject of installations... Thread-Topic: [FlyRotary] Re: On the subject of installations... Thread-Index: AcvnWvBJx93YZEkFSgik9haczZitGgAACZPw 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_E1AA3B1AF41D8049B1E3FBD5E225626008892DF912ponyexpressmb_" MIME-Version: 1.0 --_000_E1AA3B1AF41D8049B1E3FBD5E225626008892DF912ponyexpressmb_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Bill, My concern is that if the instrumentation is really measuring inches of Hg = and has an offset, the sensitivity may be such that a significant differenc= e in pressure may not show up in your data. If you are seeing an increase = in pressure as the airspeed increases, then just the units of the measureme= nt are probably incorrect, but your conclusions would be valid. Steve From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Bill Bradburry Sent: Sunday, March 20, 2011 5:59 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: On the subject of installations... That is a good point, Steve, but the real info in the data was the fact tha= t there was no pressure difference between the inlet and outlet side of the= radiator. After the pressure built in the cowl to whatever point, the pre= ssure then stayed the same all the way to the inlet of the nostril. No mor= e could come in because there was no place for it to go. Bill B --_000_E1AA3B1AF41D8049B1E3FBD5E225626008892DF912ponyexpressmb_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Bill,

 

My concern is that if the instrument= ation is really measuring inches of Hg and has an offset, the sensitivity m= ay be such that a significant difference in pressure may not show up in you= r data.  If you are seeing an increase in pressure as the airspeed inc= reases, then just the units of the measurement are probably incorrect, but = your conclusions would be valid.

=  

Steve

 

 

From: Rotary motors in aircraft [mailto:flyrotary@lan= caironline.net] On Behalf Of Bill Bradburry
Sent: Sunday, = March 20, 2011 5:59 PM
To: Rotary motors in aircraft
Subjec= t: [FlyRotary] Re: On the subject of installations...=

 

That is a good point, Steve, but the real info in the data was the fa= ct that there was no pressure difference between the inlet and outlet side = of the radiator.  After the pressure built in the cowl to whatever poi= nt, the pressure then stayed the same all the way to the inlet of the nostr= il.  No more could come in because there was no place for it to go.

 

Bill B

 

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