Numerous thoughts;
- What's the required ATC aircraft spacing at LAX & JFK on an 18mph vehicle? Does it slow down to 9mph for "final approach speed"?
- Your second link says a prototype should be finished by 2010 ... I guess I better hurry up and retire
- Talk about "short field capability"! Do they land at the correct airport or just one in the same city?
- Are they limited to 5lb packages like the Amazon octocopters?