---------------------------------------------------------- Lightning-List Digest Archive --- Total Messages Posted Fri 03/06/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:35 AM - pant and fairings on mains (Tex Mantell) 2. 06:06 AM - Re: pant and fairings on mains (N1BZRich@aol.com) 3. 03:21 PM - Re: pant and fairings on mains (Bill Strahan) ________________________________ Message 1 _____________________________________ Time: 05:35:34 AM PST US From: "Tex Mantell" Subject: Lightning-List: pant and fairings on mains Nick or Mark, I have been looking at the wheel pant and fairings and how they are mounted. When the wheel is on the ground the angle and caster is one thing, but when in the air and they hang down is another. We wouuld want the pants and fairings straight as we are flying for the least amount drag. How has this being done ? Tex ________________________________ Message 2 _____________________________________ Time: 06:06:42 AM PST US From: N1BZRich@aol.com Subject: Re: Lightning-List: pant and fairings on mains Tex, If you don't mind, let me make a comment. The angle will change, but the alignment with the relative wind should not. So where is the drag increase? Does a rain drop have more drag if it is rotated slightly? The key is to align the gear leg fainings and wheel pants with the relative wind for least drag. For the pants, that alignment should be in both the "pitch" axis and the "yaw" axis. Roll should not matter for that "rain drop" wheel pant. Blue Skies, Buz **************Need a job? Find employment help in your area. (http://yellowpages.aol.com/search?query=employment_agencies&ncid=emlcntusyelp00000005) ________________________________ Message 3 _____________________________________ Time: 03:21:21 PM PST US Subject: Lightning-List: Re: pant and fairings on mains From: "Bill Strahan" I don't think he's referring to roll, so much as pitch. Obviously, the roll angle doesn't really affect these things. I would say figure out what the attitude of the plane is in max throttle level flight. Hopefully that will be the speed in cruise with the pants, so that is the angle to shoot to duplicate. Measure the angle on a repeatable point...perhaps the center console? There are nice digital tools for measuring that angle. Then, jack the plane up so the gear is free to assume the same position it would in flight, and mount the wheel pants so they are level in that attitude. For the main gear fairings, they also need zero yaw relative to the airframe, but I would assume the nose pant would self-center to some extent. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=233530#233530 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message lightning-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Lightning-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/lightning-list Browse Digests http://www.matronics.com/digest/lightning-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.