Return-Path: Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 604281 for flyrotary@lancaironline.net; Tue, 11 Jan 2005 23:23:04 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=sqpilot@bellsouth.net Received: from [209.214.44.164] by imf20aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050112042232.FCAJ1992.imf20aec.mail.bellsouth.net@[209.214.44.164]> for ; Tue, 11 Jan 2005 23:22:32 -0500 Received: from 127.0.0.1 (AVG SMTP 7.0.300 [265.6.10]); Tue, 11 Jan 2005 22:22:24 -0600 From: "Paul" To: "Rotary motors in aircraft" Subject: props again Date: Tue, 11 Jan 2005 22:22:17 -0600 Message-ID: <000201c4f85e$4f153260$a42cd6d1@paul52u7f5qyav> X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2616 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=======AVGMAIL-41E4A600559B=======" --=======AVGMAIL-41E4A600559B======= Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01C4F82C.047AC260" ------=_NextPart_000_0003_01C4F82C.047AC260 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Well, I installed my new prop today, hoping for higher rpm's. I mistakenly assumed that by installing a smaller diameter prop with less pitch, I would gain engine rpm's. Wrong. I am still stuck at 4800 rpm's, big prop or little prop. I tried a high speed taxi (around 60 knots), but rpm's didn't seem to increase. I decided to play with the mixture a little bit. With the MicroTech, I can either adjust the mixture for the whole power curve (idle up to WOT), or adjust by MAP settings, or by throttle position sensor position. I decided to play with the map settings. I was always rich at idle. I went into the idle screen on the programmer and adjusted the idle for 15 and 20 map (leaned it) and it ran really smooth. I still am having trouble increasing the high rpm's, however. The MicroTech is capable of so many things, that it is overwhelming (to me, at least) to try to figure what the he** they are referring to with injector millisencond adjustments, air fuel mixture adjustments, timing advance adjustments, and 14 other pages of crap (they call it useful information) that is to say the least, intimidating. I'm sure what I need is in the manual..just have to decipher it all. Anyway, didn't try to fly it since I was only getting the same old 4800 static rpm's. The good news is that after an hour of reading the manual, I was able to fine tune the idle mixture so that it had no effect on the rest of the throttle settings. I guess I could say that some progress was made. (Maybe 10 percent, only 90 percent to go). Water and oil temperatures allowed me to run it long enough to try to tune it, do some high speed taxi tests, taxi back to the hangar and fiddle some more before shutting it down at a water temp of 210 degrees F. I put a fan blowing up into the NACA duct and it cooled down relatively fast in parked in the hangar with the fan blowing into the NACA thru the radiator and oil cooler. Hopefully, more fiddling tomorrow. Paul Conner ------=_NextPart_000_0003_01C4F82C.047AC260 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable

Well, I installed my new prop today, hoping for = higher rpm’s. I mistakenly assumed that by = installing a smaller diameter prop with less pitch, I would gain engine = rpm’s. Wrong. I am still stuck at 4800 = rpm’s, big prop or little prop. I = tried a high speed taxi (around 60 knots), but rpm’s didn’t seem to increase. I decided to = play with the mixture a little bit. With the MicroTech, I can either adjust the mixture for the whole power curve (idle up to WOT), or = adjust by MAP settings, or by throttle position sensor position. I decided to play with the map settings. I was always = rich at idle. I went into the idle = screen on the programmer and adjusted the idle for 15 and 20 map (leaned it) = and it ran really smooth. I still am having trouble increasing the high = rpm’s, however. The MicroTech is capable of so many = things, that it is overwhelming (to me, at least) to try to figure what the he** = they are referring to with injector millisencond adjustments, air fuel mixture adjustments, timing advance adjustments, = and 14 other pages of crap (they call it useful information) that is to say the = least, intimidating. I’m sure what I need is in the manual….just = have to decipher it all. Anyway, = didn’t try to fly it since I was only getting the same old 4800 static = rpm’s. The good news is that after an = hour of reading the manual, I was able to fine tune the idle mixture so that it = had no effect on the rest of the throttle settings. I guess I could say that some = progress was made. (Maybe 10 percent, only 90 percent to go). Water and oil temperatures = allowed me to run it long enough to try to tune it, do some high speed taxi tests, = taxi back to the hangar and fiddle some more before shutting it down at a water = temp of 210 degrees F. I put a fan = blowing up into the NACA duct and it cooled down relatively fast in parked in = the hangar with the fan blowing into the NACA thru the radiator and oil = cooler. Hopefully, = more fiddling tomorrow. = Paul Conner

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