Return-Path: Received: from [65.33.162.219] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 4.2.8) with HTTP id 624647 for lml@lancaironline.net; Thu, 27 Jan 2005 10:51:14 -0500 From: "Marvin Kaye" Subject: Re: [LML] Plenum Duct Shutoff To: lml X-Mailer: CommuniGate Pro WebUser Interface v.4.2.8 Date: Thu, 27 Jan 2005 10:51:14 -0500 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-15"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "John Schroeder" : Bill - If you can make do with a 3" diameter valve look at Eric Jones' idea. We have the prototype installed in our ES but have not flown yet. It is actuated by an RC servo and a controller that mounts in the panel. Works great in ground testing. It can be varied between full open to full closed; is very light weight and smooth. http://www.periheliondesign.com/moreproducts.htm (second item down on the list) John > I am using a 4 inch diameter duct from the tail plenum in my L-IVP to > cool my A/C condenser and would like to include a selonoid operated > shut-off to reduce the drag of the plenum air while in flight. > > In my original design, I used a divertor box from a clothes drier > exhaust; which proved to be too light weight so I am looking for > something a little heavier. Anyone have any ideas or suggestions????