X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 12 Mar 2009 10:30:48 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3544424 for lml@lancaironline.net; Wed, 11 Mar 2009 17:42:55 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d22.mx.aol.com (mail_out_v39.1.) id q.c1c.4fc63812 (39329) for ; Wed, 11 Mar 2009 17:42:18 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Wed, 11 Mar 2009 17:42:26 EDT Subject: Re: [LML] Re: LOP vs ROP Climb: Time and Fuel Burn (LIVP) X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1236807746" X-Mailer: AOL 9.1 sub 5003 X-Spam-Flag:NO -------------------------------1236807746 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Jeff L, Here's a little different take. With my NA Lyc IO 320, I climb at 135 KIAS because it seems to be the best combination of ROC while covering some ground (it "feels" good). I will see 1500 to 1800 fpm (starting out from 700 MSL) with that diminishing to 800-1000 fpm at 5000 MSL. After taking off with WOT and 2740 rpm (15 gph) and reaching about 700 AGL, the prop comes back to 2600 rpm and the constant speed climb continues at WOT. The mixture is leaned frequently to keep EGT values at levels seen during the high power takeoff roll (leans to somewhere in the best power range). At 6000 or 7000 MSL I will have leaned to no more than 11 gph. I know that engine cooling airflow is not at an optimum during climb, however oil temps are not elevated above 180F (takeoff requires at least 95F) and no cyl goes above 400F, even on a hot day. Upon leveling out, the engine is kept at 2600 rpm until cruise speed is reached (about 181 KIAS) and where the rpm is brought back to the sweet spot (2480 rpm). Throttle and mixture adjustments then finish off the process and CHTs settle back in the 340F to 360F range if I am cruising ROP or cooler if LOP. I would never climb LOP. I do climb ROP leaned to a best power range. This conserves some fuel and gets me comfortably and quickly to the desired altitude while keeping the engine pleased as punch. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) In a message dated 3/11/2009 3:49:25 P.M. Central Daylight Time, liegner@embarqmail.com writes: I'd welcome some comments about people's ROP climb numbers typically used. **************A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/100126575x1219671244x1201345076/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID %3D62%26bcd%3DfebemailfooterNO62) -------------------------------1236807746 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Jeff L,
 
Here's a little different take.
 
With my NA Lyc IO 320, I climb at 135 KIAS because it seems to=20 be the best combination of ROC while covering some ground (it= =20 "feels" good).  I will see 1500 to 1800 fpm (starting out from 700 MSL)= =20 with that diminishing to 800-1000 fpm at 5000 MSL.  After taking off wi= th=20 WOT and 2740 rpm (15 gph) and reaching about 700 AGL, the prop comes ba= ck=20 to 2600 rpm and the constant speed climb continues at WOT.  The mixture= is=20 leaned frequently to keep EGT values at levels seen during the hig= h=20 power takeoff roll (leans to somewhere in the best power range).  At 60= 00=20 or 7000 MSL I will have leaned to no more than 11 gph.  I know that eng= ine=20 cooling airflow is not at an optimum during climb, however oil temps ar= e=20 not elevated above 180F (takeoff requires at least 95F) and no cyl goes= =20 above 400F, even on a hot day.
 
Upon leveling out, the engine is kept at 2600 rpm until cruise speed is= =20 reached (about 181 KIAS) and where the rpm is brought back to the sweet= =20 spot (2480 rpm).  Throttle and mixture adjustments then finish off= the=20 process and CHTs settle back in the 340F to 360F range if I am cruising ROP=20= or=20 cooler if LOP. 
 
I would never climb LOP.  I do climb ROP leaned to a best pow= er=20 range.  This conserves some fuel and gets me comfortably and=20 quickly to the desired altitude while keeping the engine pleased as=20 punch.
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

In a message dated 3/11/2009 3:49:25 P.M. Central Dayli= ght=20 Time, liegner@embarqmail.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
I'd welcome some comments about people's ROP climb numbers typically=20 used.=20
 

A Good Credit Score is 700 or Above. See yours in just 2 easy steps!
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