X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.123] verified) by logan.com (CommuniGate Pro SMTP 5.3.7) with ESMTP id 4324195 for flyrotary@lancaironline.net; Mon, 24 May 2010 11:04:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.123; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=nvPTcbS/1X5sBfqPoji6pWQQw+epcOlfrYAGfc16qa8= c=1 sm=0 a=ADBQPqJMlbwA:10 a=Er6hwA6a1l4K/FyzC6NN7w==:17 a=ayC55rCoAAAA:8 a=arxwEM4EAAAA:8 a=QdXCYpuVAAAA:8 a=7g1VtSJxAAAA:8 a=ekHE3smAAAAA:20 a=UretUmmEAAAA:8 a=Ia-xEzejAAAA:8 a=r7AXhcq20UI7Dh67kEsA:9 a=M271mbCuO7vd8c1sKcQA:7 a=mBZlJYeSatjWGEMlvGc9rh41bC8A:4 a=CjuIK1q_8ugA:10 a=1vhyWl4Y8LcA:10 a=EzXvWhQp4_cA:10 a=QQrZMrAatb8YjY9j:21 a=z6TBHreq8TKEIYsy:21 a=SSmOFEACAAAA:8 a=NgfqoCBY8wyfe6Q7MBgA:9 a=2M1prEJ2n7Rwt9WKLKgA:7 a=2BmZtyIiT9x4ueQQKbgzAJzdsowA:4 a=uPEHtY0SFM4Q7kw9:21 a=Dm6CTEvK09CP-xM5:21 a=Er6hwA6a1l4K/FyzC6NN7w==:117 X-Cloudmark-Score: 0 X-Originating-IP: 75.181.123.159 Received: from [75.181.123.159] ([75.181.123.159:2971] helo=computername) by cdptpa-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id 3D/F1-28437-F559AFB4; Mon, 24 May 2010 15:04:00 +0000 From: "Ed Anderson" Message-ID: <3D.F1.28437.F559AFB4@cdptpa-omtalb.mail.rr.com> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] fuel system & numbers Date: Mon, 24 May 2010 11:03:39 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CAFB30.C3F00710" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 thread-index: Acr7S8dmuUFDMyTESV6SdcPKQ6U0DAABb86Q X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0009_01CAFB30.C3F00710 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit John, according to my calculations at 4750 rpm (depending on your Air/Fuel Ratio), the engine should be producing around 135-145 HP. Your 4750 rpm is a bit lower than what I would normally expect from a 2.17:1 gear box, but seeing as you have the engine a bit heavier loaded with the 2:1 gear ratio - you are probably going to pick up more RPM as you gain speed after liftoff and unload the prop a bit. So long as you have a decently long runway - I would say you are producing sufficient power - Ah, as I recall a TAILWIND was originally designed to fly on 85 HP, so you should have more than enough power {:>) Looks like to me that your engine is ready to take that first flight. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Sent: Monday, May 24, 2010 10:16 AM To: Rotary motors in aircraft Subject: [FlyRotary] fuel system & numbers Understandable I had to reprogram the computer this morning to compensate for the fuel that was seeping into the Weber. Here are the numbers OAT 78, MAP 28, static rpm 4750, prop 2375, water temp 190, oil temp 160, fuel pressure 40. These numbers are after 20 minutes running with the top cowl off so I could run it full throttle without over heating. If these numbers look good to you folks, it looks like it is ready to fly. JohnD...13B w/ 2:1 Marcotte redrive, Wittman Tailwind ------=_NextPart_000_0009_01CAFB30.C3F00710 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

John, according to my calculations = at 4750 rpm (depending on your Air/Fuel Ratio), the engine should be producing = around 135-145 HP.  Your 4750 rpm is a bit lower than what I would = normally expect from  a 2.17:1 gear box, but seeing as you have the engine a bit = heavier loaded with the 2:1 gear ratio – you are probably going to pick up more = RPM as you gain speed after liftoff  and unload the prop a = bit.

 

So long as you have a decently long = runway – I would say you are producing sufficient power – Ah, as I = recall a TAILWIND was originally designed to fly on 85 HP, so you should have = more than enough power  {:>)

 

Looks like to me that your engine = is ready to take that first flight.

 

Ed

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John
Sent: Monday, May 24, = 2010 10:16 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] fuel = system & numbers

 

Understandable I had to reprogram the computer this = morning to compensate for the fuel that was seeping into the Weber.  Here = are the numbers OAT 78, MAP 28, static rpm 4750, prop 2375, water temp 190, oil = temp 160, fuel pressure 40.  These numbers are after 20 minutes running = with the top cowl off so I could run it full throttle without over = heating.  If these numbers look good to you folks, it looks like it is ready to fly.  JohnD...13B w/ 2:1 Marcotte redrive, Wittman = Tailwind

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