Last update 9/10/96 Go back to the AIAA DBF website

Photos courtesy of Chuck Hollinger, Costa Mesa, CA 9/10/96

Chuck Hollinger "EZ Riser" was orginally designed for electric duration competition, but after the competition and upon hearing of the AIAA R/C Design/Build/Fly Competition he converted the Riser to go for distance. Vital Stats: 11 ft wing span, 1250 sq in, Astro 05 (6 turns), 5 lb 4 oz empty weight, (20) 1200 ma cells (12 pack + 8 pack), 5 lb payload, FX 63-137 main wing airfoil. He writes "The 12 cell pack was used for takeoff and climb-out. The 8 cell pack easily held its altitude for most of the flight while the 12 cells gained the extra altitude so part of the distance was covered while in the glide mode. Nevertheless, I squeezed out 15 laps. Now this was over a loosely flown course, but at least it's a starting point."

Photos courtesy of the Naval Research Laboratory

This is the SENDER UAV being developed by the Naval Research Lab. It is a man-portable fully autonomous electric powered aircraft capable of carrying a 2.5 lb payload over 100 miles.

The Naval Research Lab LAURA program investigated a number of unique aircraft configurations which were all designed and sized to perform the same mission. The mission consisted of a high speed dash followed by a low speed long endurance loiter. The designs reflect the impact of accomodating the two extremes in flight speed.

Viable electric propulsion has been made possible by the availability of very high efficiency brushless electric motors utilizing solid state speed controllers. This is the propulsion system for the SENDER UAV shown above.