Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 372930 for flyrotary@lancaironline.net; Fri, 20 Aug 2004 20:17:49 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.70; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf22aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040821001420.FVIK1788.imf22aec.mail.bellsouth.net@rd> for ; Fri, 20 Aug 2004 20:14:20 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: EM-2 MAP readings Date: Fri, 20 Aug 2004 19:14:35 -0500 Message-ID: <001f01c48713$d76ed5b0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0020_01C486E9.EE98CDB0" 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 V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_0020_01C486E9.EE98CDB0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I'm thinking that the TB ports are affected by laminar/nonlaminar/turbulent flow in the TB bores influenced by throttle plate position/presence/etc. -Mike =20 Thanks for the comments Mike. I agree, and think it would be difficult = for the TB ports to read accurately at high velocity. That being said... =20 I just hung up with TWM, and they believe those ports are completely accurate in their TB. He asked what size TB I had, what engine, and = about what HP I thought it was capable of. After hearing all that, he said my = 42 mm bores were simply too small, and that I'd need at least 45's. When I pointed out that my runners were only about 42 mm, he basically said = "start over" :-) He did mention the possibility of adding a crossover tube between the two runners, to allow one to steal from the other, but I probably wouldn't do that unless I was committed to building another = intake if it didn't work. =20 =20 BTW, he guessed right off the bat that it was on an airplane, and he mentioned that he really wished we wouldn't put their TB's on airplanes, because it made him nervous. I assured him that I wouldn't sue him, and that his TB was higher quality than anything I could cobble together, so = he was actually increasing my chances of survival :-) =20 =20 At the moment, I've decided that I just don't know what's going on yet = :-) My only benchmark is Tracy's 6200 RPM at 120-130 mph in climb, so I'll = see how I compare to that this weekend (weather permitting). I'm also = convinced that the engine is producing more power than before, due to the rapid = rise in temps now, so I'll also take a look at climb rate, and top speed at whatever altitude I can get to with the clouds. Heck, maybe I'm = worrying about nothing. =20 =20 Maybe Ed will hurry up and get his conversion done so we can get some = more data. He's probably lapping his input shaft now (which sounds a little nastier than intended) :-) =20 Cheers, Rusty (maybe an ankle weight on my right leg)=20 =20 =20 ------=_NextPart_000_0020_01C486E9.EE98CDB0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

I'm thinking that the TB ports are affected=20 by
laminar/nonlaminar/turbulent flow in the TB bores influenced by=20 throttle
plate position/presence/etc.

-Mike

 
Thanks = for the comments=20 Mike.  I agree, and think it would be difficult for the TB ports to = read=20 accurately at high velocity.  That being = said...
 
I just = hung up with TWM,=20 and they believe those ports are completely accurate in their TB.  = He asked=20 what size TB I had, what engine, and about what HP I thought it was = capable=20 of.  After hearing all that, he said my 42 mm bores were=20 simply too small, and that I'd need at least 45's.  When I = pointed out=20 that my runners were only about 42 mm, he basically said "start over"=20 :-)   He did mention the possibility of adding a crossover = tube=20 between the two runners, to allow one to steal from the other, but I = probably=20 wouldn't do that unless I was committed to building another intake if it = didn't=20 work. 
 
BTW, he = guessed right=20 off the bat that it was on an airplane, and he mentioned that he really = wished=20 we wouldn't put their TB's on airplanes, because it made him=20 nervous.  I assured him that I wouldn't sue him, and that his = TB was=20 higher quality than anything I could cobble together, so he=20 was actually increasing my chances of survival=20 :-)  
 
At the moment, I've decided that = I just=20 don't know what's going on yet :-)  My only benchmark is Tracy's = 6200 RPM=20 at 120-130 mph in climb, so I'll see how I compare to that this weekend = (weather=20 permitting).  I'm also convinced that the engine is producing more = power=20 than before, due to the rapid rise in temps now, so I'll also take a = look at=20 climb rate, and top speed at whatever altitude I can get to with the=20 clouds.  Heck, maybe I'm worrying about nothing.  =
 
Maybe Ed will hurry up and get = his=20 conversion done so we can get some more data.  He's probably = lapping his=20 input shaft now (which sounds a little nastier than intended) = :-)
 
Cheers,
Rusty (maybe an ankle weight on = my=20 right leg) 
 
  =



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