Recent news shows aerial drone delivery of small packages from an Amazon Warehouse or pizza from the nearest Dominos, but such packages are lightweight trifles compared to the 700 pounds Chip Yates promises to drop from the sky. Such loads are necessary in conflict and disaster areas, where material heavy enough to hold off an enemy or feed hordes of refugees is essential. Fifty-kilogram sacks of rice or electric generators are necessary for survival, and a heavy-duty delivery system will almost always come in handy. Chip, head of Yates Electrospace, has gone over 200 mph on an electric motorcycle, taken the UQM motor from that machine, and powered his Long-ESA aircraft to also top 200 mph. As Aviation Week and Space Technology notes in its March 26-April 8 edition, “It is ironic, therefore, that the first product from his company… should be an unmanned cargo glider.” It’s the Silent Arrow, delivered in its own box, which becomes the fuselage for …