Tracking was provided Askania Cine theodolite, cameras, Sky-screen observers and four tracking telescopes and tracking radar. White Sands Proving Ground provided housing and support for the launch program. On the RTV-A-2 (MX-774), a camera recorded the flight data displayed upon an instrument panel. Both the number of parameters recorded and the survivability of the film record were limited. Therefore, dependence upon the intact recovery of this camera was problematic. During the test on 13 July, the Hiroc reached a maximum height of , but lost thrust after 12.6 seconds and hit the ground at 48.5 seconds, from the launch pad. Due to a mistake in packing, the payload recovery parachute failed to open; a camera and a few other instruments survived, so the test was deemed a partial success. During the test on 27 September, the Hiroc reached an altitude of at 48 seconds and a maximum velocity of . The parachute failed again, this time due to a battery problem; the Hiroc began to freefall before its oxygen tank exploded at . This caused it to break up, but a camera and some instruments survived. During the test on 2 December, the Hiroc reached a maximum height of and reached a maximum velocity of . The parachute failed to open yet again, this time due to the nose cone damaging it after being ejected, while the Hiroc was at an altitude of and moving at a speed of . The camera was recovered, although it was partly damaged. The third Hiroc had its nose compartment extended 34 inches to allow more instrumentation. All three Hiroc missiles had partially failed due to premature closure of the liquid oxygen valve. The cause of failure was determined from a light on the instrumentation coming on when the valve closed. The cause of the valve closing was traced to vibration of solenoids which caused pressure change in the hydrogen peroxide line which allowed nitrogen to vent from engine control lines with the resultant pressure drop closing the LOX valve. In late 1948 the Air Force proposed the continuation of the MX-774 program with an additional 15 missiles for high altitude research but the proposal was refused by the Research and Development Board's Committee on Guided Missiles which decided that the more capable Navy Viking Missile RTV-N-12 was a superior high altitude research vehicle. Convair retained the core design team after program cancellation. That