An F-104 in a turn over Rogers Dry Lake. The landing gear and the wing leading and trailing edges flaps have been lowered. An experimental fixture is mounted under the fuselage. The F-104's high ''T'' tail was a popular design feature of aircraft in the 1950s, but this was found to cause stability problems in certain flight conditions. At high angles of attack, the horizontal stabilizer would enter the wingtip vortices, causing the aircraft to pitch up and enter a spin.