courtsy LIVEFIST. . Livefist: India Tests Mini-Drone With Pulsejet Engine ++ . . . Engaged with helping design suitable propulsion systems for unmanned air systems across the board, the National Aerospace Laboratory (NAL) has apparently tested a scaled-down (how scaled down is unclear) Rustom-1 airframe with an indigenously developed valved pulsejet engine. This picture was taken during the flight test which possibly happened early this year, or perhaps late 2010, but provides a sense of the things NAL is trying out. The agency is also involved with the Rustom-H MALE UAV and the AURA stealth UCAV programme, in the areas of design, materials and propulsion.