Return-Path: Sender: (Marvin Kaye) To: lml Date: Fri, 30 May 2003 19:37:18 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m03.mx.aol.com ([64.12.136.6] verified) by logan.com (CommuniGate Pro SMTP 4.1b6) with ESMTP id 2368863 for lml@lancaironline.net; Fri, 30 May 2003 14:02:56 -0400 Received: from Sky2high@aol.com by imo-m03.mx.aol.com (mail_out_v36.3.) id q.95.2e09161a (3842) for ; Fri, 30 May 2003 14:02:53 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <95.2e09161a.2c08f6cd@aol.com> X-Original-Date: Fri, 30 May 2003 14:02:53 EDT Subject: Re: [LML] Re: LNC2 Performance Testing X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_95.2e09161a.2c08f6cd_boundary" X-Mailer: Unknown sub 4009 --part1_95.2e09161a.2c08f6cd_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 5/30/2003 11:39:42 AM Central Daylight Time, marv@lancaironline.net writes: > Don't forget that best angle of climb is a function of AOA, and happens at > the angle of attack that matches L/D max. If you don't have an AOA indicator > you can find L/D max in a more relaxed setting by finding your best engine > out glide. Remember also that the airspeeds that at which these AOAs occur > will vary with wing loading, so will be faster when heavily loaded, slower when > light. (L/D max gives 3 critical flight regimes... engine out glide, best > angle of climb, and max endurance.) Install and calibrate an AOA indicator to > your airplane and it will tell you exactly where L/D max is every time, > regardless of wing loading... just pull back on the stick til you get the L/D max > "picture" and you're golden. Bob, Marv's answer is precisely correct. You cannot depend on any other person's results because of the variability of construction (fast versus slow build, MKII tail, long vs short engine mount, etc.), Propeller, engine options (hi vs std compression pistons, electronic ignition, etc). The advantage of AOA devices is that the answer to most critical flight questions are displayed on one device, regardless of construction, power, weight, temperature, altitude, etc. Scott Krueger Sky2high@aol.com LNC2 N92EX IO320 Aurora, IL (KARR) --part1_95.2e09161a.2c08f6cd_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable In a message dated 5/30/2003 11:39:42 AM Central Daylight Time, marv@l= ancaironline.net writes:

Don't forget that best angle of cli= mb is a function of AOA, and happens at
the angle of attack that matches= L/D max.  If you don't have an AOA indicator
you can find L/D max=20= in a more relaxed setting by finding your best engine out
glide.  R= emember also that the airspeeds that at which these AOAs occur will
vary= with wing loading, so will be faster when heavily loaded, slower when
l= ight.  (L/D max gives 3 critical flight regimes... engine out glide, be= st
angle of climb, and max endurance.) Install and calibrate an AOA indi= cator to
your airplane and it will tell you exactly where L/D max is eve= ry time,
regardless of wing loading... just pull back on the stick til y= ou get the L/D
max "picture" and you're golden.

Bob,
 
Marv's answer is precisely correct.  You cannot depend on any othe= r person's results because of the variability of construction (fast versus s= low build, MKII tail, long vs short engine mount, etc.), Propeller, engine o= ptions (hi vs std compression pistons, electronic ignition, etc).  The=20= advantage of AOA devices is that the answer to most critical flight question= s are displayed on one device, regardless of construction, power, weight, te= mperature, altitude, etc.
 



Scott Krueger
Sky2high@aol.com
LNC2 N92EX IO320 Aurora, IL=20= (KARR) --part1_95.2e09161a.2c08f6cd_boundary--