The delta planform had good internal volume for support systems and fuel; plus a low wing loading (for airframe size), that permitted supersonic flight in the mid-stratosphere (50--70,000 feet).
The delta planform had good internal volume for support systems; plus a low wing loading (for airframe size). The delta planform had good internal volume for fuel; plus a low wing loading (for airframe size). A low wing loading (for airframe size) permitted supersonic flight in the mid-stratosphere (50--70,000 feet).