X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 26 Jun 2010 17:00:54 -0400 Message-ID: X-Original-Return-Path: Received: from mail-ww0-f52.google.com ([74.125.82.52] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4371868 for lml@lancaironline.net; Sat, 26 Jun 2010 16:20:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.82.52; envelope-from=ronlaughlin@gmail.com Received: by wwb18 with SMTP id 18so641607wwb.25 for ; Sat, 26 Jun 2010 13:19:57 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:reply-to:in-reply-to:references:date:message-id :subject:from:to:content-type:content-transfer-encoding; b=xT8WpRDMyKiZmzdeZ0VDZsl0fjPVVOav6SX2bJYax590nnkOWk7TPjEXWuKOXcI0MS SwVHkSQZdD2WtWWCXJ9WLenrE1V78Az2UwG5Q1RqEulJINOkEGCBKyBPxbri/OFbTSuX tE6xTm3TNCahsT7ZBZ7TbG4IlSJNbVUE8gkCw= MIME-Version: 1.0 Received: by 10.216.160.145 with SMTP id u17mr6467758wek.18.1277583597176; Sat, 26 Jun 2010 13:19:57 -0700 (PDT) Received: by 10.216.162.209 with HTTP; Sat, 26 Jun 2010 13:19:57 -0700 (PDT) Reply-To: ronlaughlin@hotmail.com In-Reply-To: References: X-Original-Date: Sat, 26 Jun 2010 15:19:57 -0500 X-Original-Message-ID: Subject: Re: [LML] Re: LNC2/320 Cruise Speed From: Ron Laughlin X-Original-To: Lancair Mailing List Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I've been flying an IO-550-N (SR22) for a couple of years now. I always fly it LOP except for take-off and climb. I have adopted a very simple LOP protocol that works well with my engine at any rpm between 2500 to 2700. I've checked it hundreds of times against the GAMI "red zone" chart and it's always worked out to be in the safe zone. As always, YMMV. Please verify that these settings are safe for your own engine: 0 to 3000 ft MSL =3D 15.5 gph 3000 to 7000 MSL =3D 14.5 gph 7000 ft MSL and above =3D 13.5 gph 13.5 gph works out to be peak EGT at around 10,000 MSL. The engine can't make more than 65% power at that altitude anyway so I let it go slightly ROP above 10,000 to maximize power output in the teens where I usually fly. Walter taught us this "high-altitude / ROP" trick for NA engines at APS several years ago. Of course going leaner up there will greatly improve efficiency and range if that's your priority. I like things quick and simple. I just level off and set the appropriate FF. If I get bored later I'll put on my nit-picking hat and fiddle with it. Ron On Sat, Jun 26, 2010 at 10:54 AM, Douglas Brunner wrote: > I typically take off and climb at wide open throttle - 2600 rpm. Fuel flo= ws run about 28 gph at takeoff. > > As I climb I lean to about 1100 until I reach 70% power, then I lean to a= bout 1200. > > On level off I leave my throttle wide open, reduce RPM to 2500 or 2400 an= d lean my engine to about 50 LOP. > > If I am not going high enough to get below 70% power, I will reduce eithe= r RPM or MAP until I am at 70% power or below and then go lean. > > For "fooling around" at lower altitudes I will set "23 squared" and lean = to 50 LOP. =A0This usually gives me a fuel flow of between 12 and 12.5 gph = depending on temps, etc. > > > -----Original Message----- >>From: paul miller >>Sent: Jun 25, 2010 6:29 PM >>To: lml@lancaironline.net >>Subject: [LML] Re: LNC2/320 Cruise Speed >> >>Doug: (hi) where do you go LOP in the io-500? =A0 Just in cruise? >> >>Paul >> >>On 2010-06-25, at 4:48 PM, Douglas Brunner wrote: >> >>> The "GAMI boys" have a phrase for it: >>> >>> "3 knots for 3 gallons" >>> >>> Sounds like a good deal to me. =A0I always fly lean of peak in cruise. >>> >>> D. Brunner >>> WOTLOPSOP > bowel wall thickening is noted involving the sigmoid colon > > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.ht= ml >