Return-Path: <13brv3@bellsouth.net> Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 3223038 for flyrotary@lancaironline.net; Sun, 09 May 2004 10:53:07 -0400 Received: from rad ([65.6.194.9]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040509145302.OQGR16168.imf19aec.mail.bellsouth.net@rad> for ; Sun, 9 May 2004 10:53:02 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: first flight Tracy's old prop. Date: Sun, 9 May 2004 09:53:03 -0500 Message-ID: <00d301c435d5$57c8f370$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D4_01C435AB.6EF2EB70" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_00D4_01C435AB.6EF2EB70 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Great flight report Rusty. You sound a little disappointed. =20 I AM disappointed in the current performance. My friends RV-3 with a = 160 HP Lycoming is nearly doubling my climb rate, with an almost identical = prop. At least I have proof that my engine isn't producing the power that = Tracy's is, so I just need to get to work on finding out why. =20 Step one will be a simple thing, changing plugs. I now have about 30 or = so hours on the engine, mostly with 100 LL. I've felt a couple of times in = the last two runs, where full throttle seemed to go over rich, and leaning = the mixture a little seemed to help. I'm wondering if this might be Ed's = plug sag??? Step two will be a new intake, but I'm completely undecided as to how = I'll proceed. =20 Ed, you may not have a direct answer to this, but how about taking a = SWAG. How much rpm would you expect to gain by going from a typical short = intake, to a fairly well tuned intake? Are we talking hundreds, or maybe 50? =20 It was, after all, a FLIGHT report. If you would prefer you can = fiberglass my cowl and I will do your flight testing :-) Can I have about a nanosecond to think this over :-) Look at it this way. You get to keep flying until you get around to building a new intake at your leisure. I'm sure you'll get there. There's always at least one optimist in the group :-) =20 Thanks for the vote of confidence, but the problem is that I'll be = obsessed with making this perform better, and I'll spend all my time working on = it, and not flying it. This isn't bad, since I need something to tinker = with, but it sure won't get the test hours flown off anytime soon. =20 Rusty (cup usually half empty) ------=_NextPart_000_00D4_01C435AB.6EF2EB70 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Great flight report Rusty.  You sound a little=20 disappointed. 

I AM disappointed in the current=20 performance.  My friends RV-3 with a 160 HP Lycoming is=20 nearly doubling my climb rate, with an almost identical prop.  = At=20 least I have proof that my engine isn't producing the power that = Tracy's=20 is, so I just need to get to work on finding out = why.  

Step one will be a simple thing, = changing=20 plugs.  I now have about 30 or so hours on the engine, mostly with = 100=20 LL.  I've felt a couple of times in the last two runs, where full = throttle=20 seemed to go over rich, and leaning the mixture a little seemed to=20 help.  I'm wondering if this might be Ed's plug = sag???

Step two will be a new intake, but = I'm=20 completely undecided as to how I'll proceed. 

Ed, you may not have a direct = answer to this,=20 but how about taking a SWAG.  How = much rpm would you=20 expect to gain by going from a typical short intake, = to a=20 fairly well tuned intake?  Are we talking hundreds, or maybe = 50? =20  

It was, after all, a FLIGHT report.  If you would = prefer=20 you can fiberglass my cowl and I will do your flight testing =20 :-)

Can I = have about a=20 nanosecond to think this over :-)

Look at it this way.  You get to keep flying until you get = around to=20 building a new intake at your leisure.  I’m sure you’ll = get there.

There's always at least = one optimist in=20 the group :-)   

Thanks for the vote of = confidence, but=20 the problem is that I'll be obsessed with making this perform better, = and I'll=20 spend all my time working on it, and not flying it.  This isn't = bad, since=20 I need something to tinker with, but it sure won't get the test hours = flown off=20 anytime soon. 

Rusty (cup usually half=20 empty)



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