Fifty years since the Museum's birth, and thirty–five years after the fire, SDASM continues to expand and increase its collections. In 2006, the Museum changed its name from San Diego Aerospace Museum to San Diego Air & Space Museum. SDASM's collection includes 117 jet and civilian aircraft, gliders, spacecraft, missiles, drones, automobiles, and several engines, artifacts, and models. In fact, SDASM's aircraft collection has expanded beyond the Museum itself and can be found at Gillespie Field in El Cajon. Visitors can go to this offsite SDASM location to view the larger aircraft that the Balboa site is unable to house.
Another unique offsite SDASM feature is the Museum's Low Speed Wind Tunnel (LSWT) at Lindbergh Field. The Tech Manual Library and engine collections are stored at this site. It is the only privately owned low speed wind tunnel in the United States, and it is the only wind tunnel in the entire United States to perform a handful of specific aerodynamic tests. Aviation companies such as Boeing and Lockheed Martin, and groups such as the Discovery Cycling Team and the Olympic Luge Team have used the LSWT to test their equipment and models.