"The Lion Air and Ethiopian flights both had malfunctioning angle of attack sensors (like the vane on the side of the pod pictured above), not airspeed sensors.  Air France 447 would be an example of a crash triggered by a malfunctioning airspeed…"

"Oddly enough, full-size self-launching and sustainer-engined sailplanes (retracting engine) use fixed climb pitch propellors, so climb-glide is used to optimize range.  Touring motorgliders (fixed engine) usually have variable pitch propellors (or…"

"uAvionix has some interesting products, but there is one significant error throughout their web site:
ADS-B (Automatic Dependent Surveillance – Broadcast) helps aircraft operators sense and avoid possible collisions. ADS-B is mandated by the FAA for…"

"With LIDAR already in use on airplanes, it is hard to see a justification for simply banning them on UAVs that will stand for long, especially when they are going to turn out to be a central cornerstone of our navigation systems.

That's an…"

"According to his website that's a turbojet in the center, not a turboshaft driving a genset.  The (battery powered?) propellors are for attitude control only.  This is a subscale prototype, the real thing is supposed carry a pilot, use six turbojets…"

"How is it possible that the Australian government has the exact same export language as the US Dept of Commerce (EAR), all the way down to the classification number, 9A012??
See The Wassenaar Arrangement."

"While ADS-B will be mandated in the US for many aircraft in 2020, this does not mean all aircraft in US airspace will be equipped.  It will only required for aircraft certified with electrical systems flying in Class A, B, C airspace and Class E…"

"An entertaining video with an amusing presenter who gets a few things wrong (transponders don't use GPS, unless they are ADS-B out enabled).  After 30 minutes, he finally gets around to his solution, which involves a secret sauce he won't reveal.  A…"

"Keep in mind that Part 103 ultralights are prohibited from commercial use in the US, with the sole exception of flight instruction.  With the airspace restrictions, ultralights can't ever be anything more than a hobby.  The intent is to give UAVs…"

"HeliStorm, my only point is that, unfortunately, ADS-B can't be a 100% solution to being being able to sense & avoid aircraft here in the US, as not all aircraft are, or will be, equipped with ADS-B transmitters.  That includes ultralight vehicles,…"

"Excellent!  A few cautions, though, for those of us in the US:

Not all (or even most) aircraft are currently equipped with ADS-B transmitters ("out").  The FAA won't be mandating use of ADS-B out for most aircraft until 2020, and even then some…"

"Sorry for the gloom and doom, I agree that it is a gorgeous video. The implications of this are troubling, however, you don't want to know what happens next if the FAA decides these sorts of operations are inherently hazardous to third parties on…"

"That doesn't address the actual legality of what you did.  Aside from the fact that you had no permission from the FAA, Alameda County, or the City of Oakland to operate a commercial multicopter in Oakland airspace (since none of those bodies are…"

"Given that I live in Oakland, and am a licensed pilot, here are my thoughts: a fairly large and heavy multicopter flown over a highly congested urban area, by what is obviously a commercial company, for what is apparently a commercial feature film,…"

"As a glider pilot, I endorse this concept ;^)
As a practical matter, though, the reason the Army basically abandoned use of assault gliders during the late 40s was specialized transport aircraft capable of safely air dropping heavy equipment (see…"