On Sunday, December 8, 2013 10:47:00 AM UTC-5, wrote:
Neither snow nor rain nor heat nor wind above 10 knots nor gloom of night stays these couriers from the swift completion of their appointed rounds.

Ha. Yep. I expect that small UAVs will eventually have liquid fuel engines.. The electric motors make it cheap and relatively safe to prototype the hardware and software. That makes it fertile ground for a generation of young people and hobbyists to play and innovate. I wonder what the "horse people" said about those geeky Wright brothers?