- do you have any pics or hardware description of how you are using titanium? I dont thing procurring & threading rod blanks is for te average Joe?
- I have not heard of the magic number integral fraction horn placement thing before. Can you elaborate on that? I always thought it was a support distance thing; better to place the horn at the mid span to divide the load bearing control surface in half, kind of like a statics problem to minimize bending stress
- what about if the aileron is tapered, does the formula vary according to proportionate lifting area?
Titanium rods - your pretty brave if you machine them yourself. Special skills are needed, beyond what most modellers have. For short pushrods, such as aileron rods, I use r/c car suspension components available at most hobby shops. The rods come in many different lengths and have left and right threaded ends with a square section in the middle. I screw the MK ball race links onto these rods.
For longer rods, specialist pattern product suppliers sell kits consisting of 2 carbon rods and 4 titanium rod ends with 2-56 or 4-40 threaded ends. Again, screw the MK ball race links to these.
TManiaci does a fair explanation of horn placement so I won't go over this again.
The placement of the horn IS effected by aileron taper. The maths is quite simple - plenty of guys on this forum can work it out and give you the answers.
F5D aileron flutter - my initial suspicion is that the tape on the outer aileron half is dampening the oscillations, ie. it is more a mechanical solution than an aerodynamic one. How about some discussion - see what others think.
One way to test it is to provide for friction free gap sealing on the aileron outer end. If there is no flutter then the solution is aerodynamic and if the flutter persists then the solution is mechanical.