Return-Path: Sender: (Marvin Kaye) To: lml Date: Mon, 29 Sep 2003 22:31:14 -0400 Message-ID: X-Original-Return-Path: Received: from [32.97.166.34] (HELO prserv.net) by logan.com (CommuniGate Pro SMTP 4.1.4) with ESMTP id 2608579 for lml@lancaironline.net; Mon, 29 Sep 2003 21:16:36 -0400 Received: from b8p5r1 (slip-12-65-198-226.mis.prserv.net[12.65.198.226]) by prserv.net (out4) with SMTP id <20030930011633204045ck94e>; Tue, 30 Sep 2003 01:16:34 +0000 From: "Larry Henney" X-Original-To: "'Lancair Mailing List'" Subject: =?iso-8859-1?Q?RE:_=5BLML=5D_For_a_Few_Knots_More!_Or=2C_A_Fistful_of__Kn?= =?iso-8859-1?Q?ots.__?= X-Original-Date: Mon, 29 Sep 2003 20:22:57 -0500 X-Original-Message-ID: <003201c386f1$6253b840$e2c6410c@b8p5r1> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0033_01C386C7.797DB040" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0033_01C386C7.797DB040 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =20 > Conclusion: I won=92t be abnormally shifting weight to try to = increase speed. Let=92s see, during the Air Venture Cup Race, Mark=92s child was heavier than Larry=92s child (moving CG to the rear) yet Larry was = faster. I ran about as expected even though I had all my =93stuff=94 in the = back. Maybe I am fast because my engine thrust line was shifted upward which reduces tail down load?=20 Scott, =20 Gonna take a few days to ruminate on this one. At first glance, however you're giving up betweeen .4 & .9 kts / inch of CG travel with 3.6 inches (or 1.4 - 3.2 kts) left to the aft limit. That totals upwards of 3.6 kts which would kick the snot out of my competition. (using between .6 & 1.4 kts error in your 1 kt IAS improvement). =20 I'll let you know what we discern regarding the neutral point of my ship. Nor will I be "abnormally" shifting my CG but I'll probably take up at least for bead bags (100lb) for the test and move them pax footwell to hat rack. =20 BTW, my elder son was 15 lb heavier than last year's # 2 son while Mark's daughter was substantially leaner than his previous passenger and our planes were much closer than the previous year. Hmmmm. Does that contradict or endorse moving CG aft? =20 Larry ------=_NextPart_000_0033_01C386C7.797DB040 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 

 > Conclusion: I = won’t be=20 abnormally shifting weight to try to increase speed.  Let’s see, during the = Air Venture Cup=20 Race, Mark’s child was heavier than Larry’s child (moving = CG to the rear) yet=20 Larry was faster.  I ran = about as=20 expected even though I had all my “stuff” in the = back.  Maybe I am fast because my = engine=20 thrust line was shifted upward which reduces tail down load? 

Scott,
 
Gonna take a few days to ruminate on this=20 one.  At first glance, however you're giving up=20 betweeen .4 & .9 kts / inch of CG travel with 3.6 inches (or = 1.4 -=20 3.2 kts)   left = to the=20 aft limit. That totals upwards of 3.6 kts which would kick the snot = out of my=20 competition.  (using between .6 & 1.4 kts error in your 1 kt = IAS=20 improvement).
 
I'll let you know what we=20 discern regarding the neutral point of = my ship. Nor will I=20 be "abnormally" shifting my CG but I'll probably take up at least for = bead=20 bags (100lb) for the test and move them pax footwell to hat = rack.
 
BTW, my elder son was 15 lb heavier = than last=20 year's # 2 son while Mark's daughter was substantially leaner = than his=20 previous passenger and our planes were much closer than the previous=20 year.  Hmmmm.  Does that contradict or endorse moving CG=20 aft?
 
Larry
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