Return-Path: Sender: (Marvin Kaye) To: lml Date: Sat, 13 Jul 2002 01:55:51 -0400 Message-ID: X-Original-Return-Path: Received: from luke.cpl.net ([63.169.72.3] verified) by logan.com (CommuniGate Pro SMTP 4.0b4) with ESMTP-TLS id 1626893 for lml@lancaironline.net; Fri, 12 Jul 2002 22:43:36 -0400 Received: from [192.168.0.2] (137-18.red-dsl.cpl.net [192.216.137.18] (may be forged)) by luke.cpl.net (8.11.3/8.11.3) with ESMTP id g6CLojl44251 for ; Fri, 12 Jul 2002 14:50:46 -0700 (PDT) User-Agent: Microsoft-Entourage/10.1.0.2006 X-Original-Date: Fri, 12 Jul 2002 14:50:45 -0700 Subject: Re: [LML] Re: Soundproofing From: Hal Woodruff X-Original-To: "(Lancair Mailing List)" X-Original-Message-ID: In-Reply-To: Mime-version: 1.0 Reply-To: woodruff@swefco.com Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit I weighed the package that holds the soundproofing kit when I was at the factory recently. It weighed in at 48 pounds. Take away about 2 pounds for packaging and you've got quite a load to kill the sound. I agree with the need for sound deadening even though you might have ANR headsets in that the constant beating your body endures will tire you out. Better to dampen that vibration and wear the ANR's. Mike Custard, who builds Lancairs in Bend, has found a material that he says is a good substitute for the heavier kit. The material is made by EAR in Indianapolis (the same people that make the Conforfoam) and is called ADC.152. Its 9/16" in thickness and has several layers one of which is a heavier blue vinyl looking material laminated to a 1/2" of lighter foam material. The bottom layer is a peel-back pressure sensitive adhesive layer. I bought 3 sheets, 27" x 48", which according to Mike is enough to do the firewall, nose wheel cover, floorboards back to the spar, and some of the adjoining side walls. We'll see what the coverage is since I have yet to install the material. The weight of the box and foam is 26 pounds. The stuff comes with an FAR 25.853 cert. I got it from their distributor called Skandia ( 815/393-4600). http://www.skandiaupholsterysupplies.com They have several outlet facilities and I had the material in a couple of days. The cost was $100.52/sheet. Freight is extra. Hope this helps. I won't know for sure until I can fly my IV-P and then fly in other airplanes with and without sound deadening. Even this evaluation would be subjective. Wouldn't it be nice to have the equipment to measure the sound? Hal