Dave, I would have to say bottom-driven gives the best advantage. On the Icons, this has proven itself time and again. However, I would add that I have assembled a number of planes lately with top-driven linkages, including a Tragi 705x and Graphite Standard.
In actual use, I found the top mounted linkages on these planes to be perfectly adequate. I was able to set up both so that the ailerons and flaps have no slop at all, and the whole assembly feels strong. Also, it depends on the plane design. The Tragi, for example, seems to have a particularly well-designed top mounted linkage for the flaps, with adequate mechanical advantage. I am now assembling a Pike Superior, and I can already see that the top-mounted linkages on this plane were not as well thought-out or as strong as the Tragi. The thin wing leaves little room for a linkage with some mechanical advantage to help the servos in their work. On the plus side, however, protrusions from the wing surfaces are slight and the whole thing is aerodynamically very clean. Gordy feels strongly about this topic and has admonished me not to use the top-mounted linkages on my Pikes and encouraged me to adopt his bottom-mounted system. --Jim Laurel -----Original Message----- From: D Hauch [mailto:[EMAIL PROTECTED] Sent: Tuesday, June 21, 2005 6:24 PM To: soaring@airage.com Subject: [RCSE] top or bottom driven ? hi all, I've been asked this a few times, and I give my opinion, but i want to see what you guys have to say. What gets better mechanical advantage, top or bottom driven linkage, and how much does the drag of bottom driven really effect things, if any ? My vote goes towards bottom driven. I can always get the throws I want, easy to set up and adjust, and gives a solid control surface. Dave Hauch www.git-r-built.com RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
