[SystemSafety] Anyone for a trip to Dubai?

[paul_e.bennett at topmail.co.uk]

On 15/02/2017 at 9:42 AM, "John J SPRIGGS"  wrote:         

	OK, it is not functional safety, but why don’t “drones” have
ducted propellers, or at least some form of guard around them? 
	JohnConsidering that thrust efficiency is usually improved by
ducting, I have 
wondered that myself. It would also aid general safety when people are

in closer proximity than they should be.

Regards
 Paul E. Bennett IEng MIET
 Systems Engineer
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