The Aircrew Training Research Division of Armstrong Laboratory at Williams AFB, AZ has developed a S1MNET Version 6.6.1 compatible network of dissimilar aircrew training devices. The multiship research and development system (MultiRAD) uses distributed micro-processor technology to integrate: an exercise control and videotaping system, two high fidelity F-15 and two lower fidelity F-16 cockpits, visual display systems, a ground controlled intercept (GCIJ station, and a computer generated threat system. As part of systems integration and development, four one-week tests were conducted in which F-15 pilots and air weapons controllers participated in simulated air combat training exercises using the MultiRAD system. During these exercises, pilots and controllers flew simulated offensive and defensive counter-air missions against a force of up to six threat aircraft plus surface-to-air missiles. Participants then evaluated the utility of the MultiRAD system for air combat training. System components were modified after each of the four weekly tests based on the participants' evaluations. Systems development, integration, and modifications, based on pilot and controller evaluations, are discussed along with lessons learned.