X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 22 Feb 2010 08:09:18 -0500 Message-ID: X-Original-Return-Path: Received: from imr-da06.mx.aol.com ([205.188.169.203] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4132380 for lml@lancaironline.net; Sat, 20 Feb 2010 23:39:37 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.169.203; envelope-from=Sky2high@aol.com Received: from imo-ma04.mx.aol.com (imo-ma04.mx.aol.com [64.12.78.139]) by imr-da06.mx.aol.com (8.14.1/8.14.1) with ESMTP id o1L4coFN005009 for ; Sat, 20 Feb 2010 23:38:50 -0500 Received: from Sky2high@aol.com by imo-ma04.mx.aol.com (mail_out_v42.9.) id q.cc4.663e6de8 (34931) for ; Sat, 20 Feb 2010 23:38:46 -0500 (EST) Received: from magic-d16.mail.aol.com (magic-d16.mail.aol.com [172.19.155.132]) by cia-da04.mx.aol.com (v127.7) with ESMTP id MAILCIADA044-88734b80b8d631f; Sat, 20 Feb 2010 23:38:46 -0500 From: Sky2high@aol.com X-Original-Message-ID: <310d1.6329b709.38b212d6@aol.com> X-Original-Date: Sat, 20 Feb 2010 23:38:46 EST Subject: Re: [LML] 320 Airfoil Reflex X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_310d1.6329b709.38b212d6_boundary" X-Mailer: AOL 9.5 sub 155 X-AOL-ORIG-IP: 67.175.242.202 X-AOL-IP: 172.19.155.132 X-Spam-Flag:NO X-AOL-SENDER: Sky2high@aol.com --part1_310d1.6329b709.38b212d6_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Rob, The 235 faired in position was with the flaps down and out of reflex but the flaps were able to be adjusted so that something like -7 degrees of reflex was obtainable with the flap switch, thus raising the flaps above the faired position for cruise flight. The 320/360 redesign changed the fairing (among other things). You know, part of this problem occurs because of the desire to always put in more power. The 200 became the 235 because people wanted the greater power. The design parameters for the 235 called for an engine producing about 135 HP. But no, some just had to put 320's in them and Lance once again revised the design for 160-180 HP (320/360). That wasn't enough, thus the Legacy. Just note that fine tuned 360s are always flying in the yellow arc. I'm sure glad the whole series was, uh, over designed. Scott In a message dated 2/20/2010 9:47:46 P.M. Central Standard Time, rwolf99@aol.com writes: Larry and Greyhawk - My understanding matches Scott's, i.e., the 7 degree reflex is "built into" the wing so that the wing-body fairing lines up with the flaps when they are reflexed. However, I heard a rumor that earlier kits (possibly the 235, and maybe the 200 in the EAA museum) may not have had the reflex built in. I don't know the anwer, but I have provided the airfoil coordinates for the NLF-0215 airfoil used in the 320/360. I'm sure it will be a pain to measure the wing and figure out what flap deflection matches the basic airfoil, but I think it's the only way to get your answer. This data coes from NASA-TP-1865 written by Dan Somers in 1981. It is the definitive definition of the airfoil (if I may be permitted the redundancy). A more relevant answer, howevr, might be obtained by adjusting the flaps in flight until you get the performance you want. Enjoy! - Rob Wolf -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html --part1_310d1.6329b709.38b212d6_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Rob,

The 235 faired in position was with the flaps down and out= of=20 reflex but the flaps were able to be adjusted so that something like -7 de= grees=20 of reflex was obtainable with the flap switch, thus raising the flaps abov= e the=20 faired position for cruise flight. The 320/360 redesign changed the= =20 fairing (among other things).

You know, part of this problem occurs because of the desire to always= put=20 in more power. The 200 became the 235 because people wanted the grea= ter=20 power. The design parameters for the 235 called for an engine produc= ing=20 about 135 HP. But no, some just had to put 320's in them and Lance= once=20 again revised the design for 160-180 HP (320/360). That wasn't enoug= h,=20 thus the Legacy. Just note that fine tuned 360s are always flying in= the=20 yellow arc. I'm sure glad the whole series was, uh, over designed.

Scott

In a message dated 2/20/2010 9:47:46 P.M. Central Standard Time,=20 rwolf99@aol.com writes:

Larry and Greyhawk -

My understanding matches Scott's, i.e., the 7 degree reflex is "bui= lt=20 into" the wing so that the wing-body fairing lines up with the flaps whe= n they=20 are reflexed. However, I heard a rumor that earlier kits (possibly= the=20 235, and maybe the 200 in the EAA museum) may not have had the reflex bu= ilt=20 in.

I don't know the anwer, but I have provided the airfoil coordinates= for=20 the NLF-0215 airfoil used in the 320/360. I'm sure it will be a pa= in to=20 measure the wing and figure out what flap deflection matches the basic= =20 airfoil, but I think it's the only way to get your answer. This da= ta=20 coes from NASA-TP-1865 written by Dan Somers in 1981. It is the=20 definitive definition of the airfoil (if I may be permitted the=20 redundancy).

A more relevant answer, howevr, might be obtained by adjusting the= flaps=20 in flight until you get the performance you want.

Enjoy!

- Rob Wolf

--
For archives and= unsub=20 http://mail.lancaironline.net:81/lists/lml/List.html

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