Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Thu, 08 Jul 2004 19:05:02 -0400 Message-ID: X-Original-Return-Path: Received: from sccrmhc13.comcast.net ([204.127.202.64] verified) by logan.com (CommuniGate Pro SMTP 4.2b7) with ESMTP id 251245 for lml@lancaironline.net; Thu, 08 Jul 2004 18:55:52 -0400 Received: from cc1860069a (pcp09040864pcs.rocsth01.mi.comcast.net[69.244.182.42]) by comcast.net (sccrmhc13) with SMTP id <2004070822552201600o54v6e>; Thu, 8 Jul 2004 22:55:23 +0000 X-Original-Message-ID: <00b201c4653e$629f47c0$6401a8c0@rocsth01.mi.comcast.net> From: X-Original-To: "Lancair Mailing List" References: Subject: Re: Wheel Wells, noise X-Original-Date: Thu, 8 Jul 2004 18:53:22 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00AF_01C4651C.D7B883E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_00AF_01C4651C.D7B883E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yup, I started into all that sound deadening stuff too. Then realized I = could just buy the Bose ANR headsets and get all the "sound deadening" = where it matters - at my ears. The other bird I killed with that stone = was to discard the vise-like and musically challenged David Clarks. = That EAR stuff is heavy. =20 Regards, Ed > Even though I am merely flying a lowly 320, I did employ the E.A.R. = suggested noise supression material along with ensuring that the = D-section (forward of the main spar in the stub wing) damped the "guitar = sound-box" effect. I have various foam/dead aluminum on the firewall, = nose wheel well, bottom and side fuselage walls as far back as the seat = back. Unfortunately (for me), after attenuating those noise sources, = the cabin cooling NACAs and the "hot-house" canopy (3/16", Later = versions were thicker) contribute more to the cockpit noise (prop = generated) than those supressed areas.=20 > I would think that all high speed aircraft would benefit from even = thicker canopy "glass", wee props (if any) and a more indirect cockpit = cooling air source. Or, maybe we should just all wear HELMETS with ANR = (ignoring any passenger needs - see ***). You know, ------=_NextPart_000_00AF_01C4651C.D7B883E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Yup, I started into all that sound deadening stuff too. Then = realized=20 I could just buy the Bose ANR headsets and get all the "sound deadening" = where=20 it matters - at my ears. The other bird I killed with that stone = was to=20 discard the vise-like and musically challenged David Clarks. That = EAR=20 stuff is heavy.

Regards,

Ed

> Even though I am merely flying a lowly 320, I did employ = the=20 E.A.R. suggested noise supression material along with ensuring that the=20 D-section (forward of the main spar in the stub wing) damped the "guitar = sound-box" effect. I have various foam/dead aluminum on the = firewall, nose=20 wheel well, bottom and side fuselage walls as far back as the seat=20 back. Unfortunately (for me), after attenuating those noise = sources, the=20 cabin cooling NACAs and the "hot-house" canopy (3/16", Later versions = were=20 thicker) contribute more to the cockpit noise (prop generated) than = those=20 supressed areas.

> I would think that all high speed aircraft would benefit = from=20 even thicker canopy "glass", wee props (if any) and a more indirect = cockpit=20 cooling air source. Or, maybe we should just all wear HELMETS with = ANR=20 (ignoring any passenger needs - see ***). You know,=20

------=_NextPart_000_00AF_01C4651C.D7B883E0--