There are a number of UAVs that are not available as commercial kits that I would really like to build. The Lockheed RQ-3 Darkstar is among them.
The Lockheed RQ-3 Darkstar was developed as part of DARPA’s High-Altitude Endurance Unmanned Aerial Vehicle (HAE UAV) program in the 1990s. This Advanced Concept Technology Demonstration (ACTD) program was intended as a means for the rapid, cost-effective demonstration of new capabilities and systems for the military services.
Two air vehicles were developed for HAE UAV: a conventional configuration (Tier II+) designed by No