"an rc jet can reach speeds of over 300mph with an off the shelf turbine and an airframe capable of handling it.  no afterburner required.  The problem is that most RC jet engines have centrifugal single stage compressors and single stage…"

"I guess you havnt heard of the "Global Hawk"? Or the Predator? Etc etc. Just put UAVs into Google and see what you get."

"We are working on one now. Will advise when we can release more info. Should be capable of 300mph under afterburner (yep!) "

"in my case, I would add the roll bar and leave out the pilot instead ;-)"

"Of course your're right. Safety is important.   But I guess they left out the roll bar because of the extra weight."

"While I generally agree with that, and I am amazed at the boldness and attractive build, the Bachem Ba 349 Natter was also German Engineering. My point is everyone makes mistakes. I think a roll bar is still needed for the safety of the pilot.…"

"Don't you worry:   ....it's German Engineering!   ;-)   That's why my quad didn't flip eather  :-)      ...yet"

"The truth is that these guys know more about multicopters than I ever will. That does not change the fact that, in my mind, the moment I saw this I greatly feared for the test pilot's safety, and those around him. If mistakes with a small quad…"

"I was thinking there would be some mincing present.will the amount of blades would offer some stabality?Maybe have the passenger sitting under the blades."

"Get good lawyer. You'll want him to review the life insurance policy to be sure it covers this unique form of insanity. Then build an normal sized arducoptermega so you can see how fast they flip and drill into the ground, so you can see…"

"That is a very broad question. Radio propagation, power levels, antennas, frequencies, data rate, too many assumptions. Most of the frequencies used by the gear you are most likely to employ functions best with line of sight. Your best bet, if you…"

"The potential use of small turbine UAS is the reason banning model jets in the USA is still sat on the table at the FAA.   Also on the table a speed restriction for all model aircraft. I don't think it was by accident that somebody was…"

"Ordinarily UAVs try for endurance not speed. Increased Loiter time requires increased fuel efficiency. True turbines used in R/C are fuel hungry speed demons. I guess it depends on your intended mission."

"The Lockheed "Blackbird" SR 71 carried a drone on its back which was air-launched, and even faster than the Blackbird,  achieving nearly Mach 4.After a launch accident which totalled both aircraft the system was discontinued."