UPPER AIR ROCKET SUMMARY                                                                       V-2
                                                                                                                           NO. 38
IDENTIFICATION                                                                                  19 April 1948

    Time of firing: 1254 MST
    Agency: Naval Research Laboratory
    Altitude: 34.8 miles

UPPER AIR INSTRUMENTS

    Density-pressure-temperature: Pressure gages on tail section
    Cosmic radiation: Nuclear research emulsions
    Solar radiation: Sunflower solar spectrograph
    Ionosphere: Generating voltmeter (electrostatic field) on midsection. Positive ion
        collector on nose.
    Metro cameras: meterological data from wind effects on vapor trail
    Other: Cross jet attenuation transmitters and receivers

DATA RECOVERY INSTRUMENTS

    Telemeter: An/DKT-2 (XN-1) 30-channel pulse position system
    Airborne recorder: Solar spectrogram recording camera
    Physical recovery: Sunflower-spectrograph ejector mechanism with parachute;
        warhead separation explosives in control section

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Two Mitchell and seven Askania stations
        Cameras: Two ballistic and three Bowen-Knapp stations
        Telescopes: Four stations
        Radar: Two modified SCR-584 stations
        Doppler: Four stations
        Impact location: Sound ranging

ROCKET INFORMATION

    Unfueled rocket weight: 9169 lb
    Gross weight at takeoff: 28,287 lb

ROCKET PERFORMANCE

    Program angle: 15 degrees (actual)
    Time to burnout: 57.1 sec.
    Velocity at burnout: 3680 ft/sec.
    Altitude at burnout: 15 miles
    Time to zenith: 134.5 sec.
    Altitude to zenith: 34.8 miles
    Time to tail blowoff: 60.1 sec
    Altitude to tail blowoff: 17 miles
    Flight duration: 305 sec
    Impact coordinates: 32 mi. north, 7 mi. west

BALLISTIC DATA

    Theodolites: Mitchell - both stations tracked to 95 sec, one to impact; Askania -
        trajectory data from 0 to 60 sec
    Cameras: Bowen-Knapp - satisfactory operations; ballistic - good record for 70 sec
    Telescopes: satisfactory operations
    Radar: Tracked for entire flight
    Doppler: Fair signals until blowoff

DATA RECOVERY

    Physical recovery: Sunflower ejected at fuel cutoff and separated as shown by
        telescope film, but never recovered. Warhead separation explosives set off at
        60 sec.

COMMENTS

    Rocket performance: Propulsion normal. Steering faulty, between 13 and 29 sec
        rocket rolled 40 to 50 degrees and returned to normal four times, then began
        8.3 rpm roll. Rocket began to deviate to the west and propulsion was terminated
        to prevent crossing range boundary

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