---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Tue 06/07/22: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:16 PM - Re: What did you do with your Europa this week 6/6 - 6/13 (Erich Trombley) ________________________________ Message 1 _____________________________________ Time: 08:16:26 PM PST US From: Erich Trombley Subject: Europa-List: RE: What did you do with your Europa this week 6/6 - 6/13 Hello all, I am reworking my Dynon pitch servo installation. Having installed the servo as a retrofit, I chose the tunnel bulkhead (just aft of the Monowheel opening) as the mounting location. The servo is oriented vertically on the bulkhead with the push-pull rod pointed aft and connected directly to the pitch tube. Unfortunately, the installation has performed poorly, with the pitch servo unable to hold altitude. With the plane trimmed out prior to engaging the AP she flys steady hands off. As soon as I engage the autopilot it start hunting with huge altitude excursion ensuing. I talked with Dynon at SNF, and they suggested I check for play in the push-pull linkage and pitch tube control linkage. While I dont have any play in the system, I did find that the tunnel bulkhead was flexing, which essentially has the same affect. This was surprising as the bulkhead is 3mm plywood with fiberglass on both sides. So, I am fabricating a new bulk made from a 1/4 foam core with carbon fiber on both sides. Boy is this stuff rigid. I am also adding a couple of stiffeners which is probably overkill. Well, more to come, Erich ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.