TLDR; Here is an overview on what I suggest
- We clarify the scope of our questions on flying technique, aerodynamics, regulations (including Air Traffic control) and design/manufacture to prefer full scale aviation (ie, NOT drone/UAVs)
- We continue to allow questions on Drones/UAVs where there is crossover to full-scale aviation (eg, where the regulations cross over, or the aerodynamics are not affected by the scale).
- We migrate questions regarding small-scale aviation to Drones.se (They are happy for such migration)
- We write an FAQ on the outcome for future reference. (Completed)
Note, I am not fixed on any of the above (except 4, for obvious reasons) and am happy to discuss/refine.
Full/original answer below.
Do we need a clearer policy?
What that should be?
I believe we should be guided primarily by our on topic help page, for which the scope of our site has been built over many iterations.
Lets take the reasons individually and decide if/how they might relate to Drones/UAVs
Flying technique, maneuvers, navigation, procedures, etc.
If the question is about the technique of flying a drone, in the general aviation sense rather than something specific to drones then it might be on topic here
Air Traffic Control
If the question is about regulations to do with flying in controlled airspace such as ATZs, then it might be on topic here.
Unlikely any Drone questions might fall into this category. More likely any questions about drones/weather would be better suited to Drones.se
Similar to the ATC category, it would need to be about how the regulations fit in with full-scale aviation to make sense here.
Aerodynamics (related to aircraft)
This is where it gets tricky. I would advocate this be changed in our on-topic page to relate to full scale aviation as questions about powerplants, control surfaces, etc on drones feels better suited to Drones.se
Unlikely any Drone questions might fall into this category, where they do it would be specific to Drones, and would fit better in that site.
Aircraft Design and Manufacture
Again, grey area, I would like our scope here reduced to full scale aviation.
Where a question (such as the one which started this conversation) are asking about the aerodynamics specific to Drones, I feel that question is better suited to a site which specialize in drones, which is why I migrated it.