X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao104.cox.net ([68.230.241.42] verified) by logan.com (CommuniGate Pro SMTP 5.2.7) with ESMTP id 3120217 for flyrotary@lancaironline.net; Mon, 08 Sep 2008 18:58:26 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.42; envelope-from=alventures@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao104.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080908225751.LKVR6526.fed1rmmtao104.cox.net@fed1rmimpo03.cox.net> for ; Mon, 8 Sep 2008 18:57:51 -0400 Received: from BigAl ([72.192.137.74]) by fed1rmimpo03.cox.net with bizsmtp id CNxq1a00C1cVYgg04Nxq3r; Mon, 08 Sep 2008 18:57:50 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: 20B Update from Mark? Date: Mon, 8 Sep 2008 15:58:00 -0800 Message-ID: <9FF859F6653D437A86097191C1FD29B0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C911CB.AB74ED90" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C911CB.AB74ED90 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable The real "jewel" has been the c/s prop. This allows me to cruise at = around 10.6 gph at 4200-4500 rpm, 153 TAS. Until recently, I had been cruising = at 5200 rpm, burning 14-15 gph. Speeds are about the same. =20 Mark Hi; Mark, Is your fuel burn pretty accurately calibrated? My gallons used readout = is still about 5% high, so my burn would be likewise. I typically cruise = my 20B at about 5400 - 5500 rpm, MAP aprox. 18" at 7500' and get 9.3-9.5 = gph when running 50-80F LOP. I expect the MAP readouts may differ a bit as = I found I had to change the calibration on mine to get a correct reading. = TAS reported is calculated by the EM-2 and is in kts.=20 My EM2 reads out mph. I guess you changed the calibration factor. Also = the TAS is about 5% higher than the GRT EFIS readout. Best, Al ------=_NextPart_000_0006_01C911CB.AB74ED90 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

The real "jewel" has been the c/s prop.  This allows me to cruise at around 10.6 gph at 4200-4500 = rpm, 153 TAS.  Until recently, I had been cruising at 5200 rpm, burning = 14-15 gph.  Speeds are about the same. 

Mark

Hi; Mark,

Is your fuel burn pretty = accurately calibrated?  My gallons used readout is still about 5% high, so my = burn would be likewise.  I typically cruise my 20B at about 5400 - 5500 = rpm, MAP aprox. 18” at 7500’ and get 9.3-9.5 gph when running 50-80F = LOP.  I expect the MAP readouts may differ a bit as I found I had to change = the calibration on mine to get a correct reading.  

 TAS reported is calculated by the EM-2 and is in = kts. 

My EM2 reads out mph.  I = guess you changed the calibration factor.  Also the TAS is about 5% higher = than the GRT EFIS readout.

Best,

Al

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