""Flying a drone is much more dangerous than firing a firearm into the National Air Space above 400' or within 5 miles of an airport. Even if it is for recreation and not for pay."

Is this a joke? Unbelievable."

"That seems absolutely pointless."

"What does "tethers onboard all research aircraft mean"? The paper notes this as well. I'd be interested to learn more about it."

"The analog control computer from the PA-4 is still around. I'll try to post some pics."

"BTW - I am really impressed with your winglet mold. Is that something you produced in a home shop? Lot of polishing time?"

"Andrew - thanks. I had not considered .stl files for individual components. That sounds like a great approach. I will have to jump back into the documentation, but I assume openFoam can combine multiple stl files into a single mesh?
I do have one…"

"Andrew - Could you share some details on creating the mesh and modifying it in OpenFoam? I have always found that is the hardest problem to overcome when using it. Are you using a commercial grid program or just the OpenFoam tools? Thanks."

"I should add - this is definitely interesting work when it comes to the idea of a ground vehicle supporting several UAVs to deliver various lightweight packages over short distances each time the ground vehicle stops in a new neighborhood. It'd be…"

"Hopefully the author might read DIY Drones - how would the results change if the reactive planner was only slightly more conservative on when to return to base? 10% seems like a low reserve for a good comparison. It would be interesting to see how…"

"Gary, you're right! That quad should definitely not be in the air! To think what could have happened if a manned airplane was flying through the fireworks at the same time?"

"I support his idea, but talk about pretentious - claiming to be more safety conscious than NASA because he hasn't killed any astronauts."

"Boeing didn't do this - they just supplied the helicopter."

"http://www.coocox.org/"

"Why is ArduIMU still being sold as including DMP support when that is a total non-feature?"

"I don't see how this is any more (or less) maintenance intensive than a typical helicopter. You've gotten rid of an oil system, an actuation system, and the transmission itself, but have replaced it with a multitude of identical but very simple…"

"Thanks for the explanation Bill. I guess I am a bit surprised that the measured transfer function is stable if feedback is not a factor. But, I am new to quads. I got into them with the intention of developing a model following-type controller…"