Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3137046 for flyrotary@lancaironline.net; Tue, 30 Mar 2004 13:36:20 -0500 Received: from edward (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i2UIaHkG000028 for ; Tue, 30 Mar 2004 13:36:18 -0500 (EST) Message-ID: <003901c41685$e43115a0$2402a8c0@edward> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: No rev-2 flying yet (Tracy, see comments in red) Date: Tue, 30 Mar 2004 13:36:18 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0036_01C4165B.FB21D530" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0036_01C4165B.FB21D530 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageI am curious Rusty about how easy/hard to start on a cool morning = with the injectors 30" away. On my last manifold all 4 were approx 24" = away and starting on a cold morning was a b----, I would sometimes use = up the battery charge. Now all 4 injectors are approx 5" away from the = inlet to the combustion chamber and it starts on the first turn or two = of the prop. Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Tuesday, March 30, 2004 1:15 PM Subject: [FlyRotary] Re: No rev-2 flying yet (Tracy, see comments in = red) This may occur because in one fraction of a second you are opearting = at WOT (lots of fuel flow) and the next down to idle. =20 In thinking about this some more, it would make sense that I didn't = have nearly the same problem before. In the rev-1 version, I had the = primary injectors in the block, and the secondaries were only about 14 = inches away. Now, all four injectors are about 30 inches away, so = there's a lot more fuel left in the intake when you chop the throttle. I agree with Tracy that this isn't my normal operating mode, but when = testing the engine, I like to try everything I can think of, so there = won't be any unpleasant surprised in flight. FWIW, the turbo used to = throw a nice flame out the short pipe when I'd chop the throttle, but I = don't know if that would make it to the end of a longer pipe, through a = muffler. =20 Rusty (off to test my O2 reading on the EM-2) ------=_NextPart_000_0036_01C4165B.FB21D530 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
I am curious Rusty about how easy/hard = to start on=20 a cool morning with the injectors 30" away.  On my last manifold = all 4 were=20 approx 24" away and starting on a cold morning was a b----, I would = sometimes=20 use up the battery charge.  Now all 4 injectors are approx 5" away = from the=20 inlet to the combustion chamber and it starts on the first turn or two = of the=20 prop.
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Tuesday, March 30, 2004 = 1:15=20 PM
Subject: [FlyRotary] Re: No = rev-2 flying=20 yet (Tracy, see comments in red)

This may occur because in = one fraction=20 of a second you are  opearting at WOT (lots of fuel flow) =  and=20 the next down to idle.   
 
 
In thinking=20 about this some more, it would make sense that I didn't have nearly = the same=20 problem before.  In the rev-1 version, I had the primary = injectors in the=20 block, and the secondaries were only about 14 inches away.  Now, = all four=20 injectors are about 30 inches away, so there's a lot more fuel left in = the=20 intake when you chop the throttle.
 
I agree with=20 Tracy that this isn't my normal operating mode, but when testing the = engine, I=20 like to try everything I can think of, so there won't be any = unpleasant=20 surprised in flight.  FWIW, the turbo used to throw a = nice=20 flame out the short pipe when I'd chop the throttle, but I don't = know if=20 that would make it to the end of a longer pipe, through a=20 muffler.  
 
Rusty (off to=20 test my O2 reading on the=20 = EM-2)  
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