With the advent of the Rotary Driver System http://www.proptwisters.org/rds2/, the servo in a molded wing can be vertically mounted anywhere. It is simply then tilted so the drive shaft enters the pocket in the moving surface, which can also be about anywhere in thin surfaces. This simplifies the mounting and also gets rid of those pesky horns, clevises, threaded rods, etc. There is no longer any reason to have hardware, horns or otherwise, hanging out of those beautiful wings. Adapters are now being produced by Kimbrough Products that fit the fine Volz and Multiplex servos favored by those flying the more extreme ships. If manufacturers would provide circular openings in wings or offer rectangular openings oriented at 45 degrees to the hinglines, or respond to request to provide wings with no openings so modelers could make them as needed, it would make use of the RDS possible in molded ships much easier. Circular openings are less subject to stress fracture than rectangular openings that have sharp corners. Volz has a round servo that takes advantage of that. The practice of making openings oriented at 90 degrees and further outboard than needed for the RDS, effectively denies the modeler the benefits available, namely eliminating or reducing slop, drag, noise, clutter and getting better roll response by moving mass more inboard. A great deal of information is provided in the website mentioned above. This advanced technology is a reality ready to be used. ---------- > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED]; [EMAIL PROTECTED] > Subject: [RCSE] RE:Hey you Geometry Brains, question about servo mounting > Date: Tuesday, June 06, 2000 10:46 AM > > In a message dated 6/6/00 1:19:16 PM Eastern Daylight Time, Raschow writes: > << How does it affect the throw and power of the servos, both having the > same > two hole arm and the wing is about 1" deep. the flap horn about 1/2" high? > >> > > Not at all - length of servo arm and length of flap horn to the hinge are > what are important - these don't change with which skin is used for anchoring > the servo. >> > Thanks for you comments, > > Since I have done so many foam cores and the servos end up flush with the > bottom, I assumed that it was the 'correct' way to mount them. But lots of > guys with moldies seem to be just gluing the servo to the top skin, deep > inside the wing. They still just use the 2 hole horn. > > Math isn't my thing, so I figured I would ask some of the engineer types out > there. > > Anyway, I have been shimming my servos in the moldies to bring them flush > with the bottom skin like my bagged ships figuring that was the 'correct' > thing to do. > > To me it seems like the servo mounted in deep would be pulling against the > hinge line, trying to pull the flap service forward into the wing, instead of > up in a rotation. > > What do you think? > Gordy > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
