Time of firing: 2343 MST
    Agency: Air Research and Development Command
    Altitude: 83.0 miles

UPPER AIR INSTRUMENTS

    Density-pressure-temperature: Skin temperature experiment: Nickel temperature-
        sensitive elements, commutated in one arm of ac resistance bridge, to sense
        heat change in flush-mounted thin steel diaphragms distributed along rocket skin
        (Boston U.)
    Soft solar x-ray study: Four packets containing photographic film were placed on
        surface of warhead (AFCRC)
    Photographic studies: Two modified GSAP cameras with prisms were mounted in
        warhead to view Luxembourg probe and record power discharge and afterglow of
        the probe (WPAFB & FILRAD)
    Spectrograph study: Two spectrographs located in instrument compartment to
        record light produced in vicinity of Luxembourg probe (AFCRC)
    Airglow experiment: A high-power, low frequency Luxembourg transmitter was used
        for this experiment; peak power of approximately 60 kilowatts and generator
        pulses of 25-microsec duration which would be radiated off a probe on the nose
        of the warhead (AFCRC)
    Photoelectric analysis by UCLA: Two photoelectric detecting devices located at
        ground stations to observe discharge produced by Luxembourg transmitter
    Voltage breakdown experiment: Three sets of electrodes at varying spacing mounted
        on surface of rocket nose cone (AFCRC)
    Common power supply experiments: Battery-powered 400-cycle motor generator
        sets used to supply power for all experiments.

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL PXTA-501 PPM-AM 23-channel telemetering system was used, but
        a slot antenna (cavity type) located on outer shell of the Blossom was used in lieu
        of standard NRL turnstile. BRL PWM 28-channel telemetering system was used
        to record rocket performance measurements.
    Airborne recorder: Tufts College data recorder unit to record rocketborne experi-
        mental data in voltage form
    Physical recovery: Separation of warhead by radio command to ARW-37 control
        receiver, and, in event of failure by this means, separation was to be effected by
        a timer. Parachute studies - 100-ft canopy type parachute, a 4-ft pilot chute,
        and a 32-ft flat circular brake parachute (WPAFB and FILRAD). Blossom IV-A
        experiment - new elongated nose section was to be lowered to earth by parachute
        (FILRAD).

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Two Mitchell and seven Askania stations
        Cameras: Two ballistic and two Bowen-Knapp stations
        Telescopes: Four stations
        Radar: Two modified SCR-584 S-band stations
        Doppler: Six stations

    Airborne
        Beacon: 470-493.5 Mc beacon to provide measure of delay time through the E
            layer. Utilized new flush-mounted antennas. (U. of Utah and AFCRC.)
        Doppler: Doppler carried
        Radio Cutoff: ARW-37 FM control receiver for command cutoff and blowoff
        Aspect: Pitch andy yaw gyroscopes
        Vibration: Pickups in rockets
        Other: Triangulation tests - recording of replies from ionosphere beacon at
            four ground stations to provide position coordinates of rocket in flight
            (AFCRC)

ROCKET INFORMATION

    Unfueled rocket weight: 9971 lb
    Gross weight at takeoff: 29,636 lb

ROCKET PERFORMANCE

    Firing angle: Four degrees west of north
    Program angle: Seven degrees
    Time to burnout: 65.7 sec
    Velocity at burnout: 4466 ft/sec
    Altitude at burnout: 20.34 miles
    Time to zenith: 211.0 sec
    Altitude at zenith: 83 miles
    Flight duration: Approximately 380 sec
    Impact coordinates: 33.4 mi. north, 0.8 mi. east

BALLISTIC DATA

   Theodolites: Coordinate data from 0 to about 70 sec, uncorrected data to 120 sec
    Cameras: Mitchell - good records at one station
        Ballistic - good images recorded at D and R stations through burnout
        Bowen-Knapp - satisfactory records at U and V stations
    Telescopes: Good images 0 to 80 sec from 3 stations. Spectrograph at T-IV recorded
        Luxembourg effect.
    Radar: Trajectory data from 0 to 335.5 sec
    Doppler: Trajectory data from 0 to 371.2 sec

DATA RECOVERY

    Telemeter: PPM-AM - excellent signals from 0 to 376 sec, but recorders were
        jammed; BRL PWM-AM - no record, telemeter power failure
    Physical recovery: None, since the Blossom experiment failed
    Airborne recorder: Recorder destroyed at impact

EXPERIMENTAL DATA

    Airglow experiment: Failed to operate except for 13 sec near the end of flight
    Ionosphere beacon experiment: Beacon operated well until fuel burnout and for a
        brief period near peak altitude; however, its failure during the remainder of the
        flight resulted in recovery of very little usable data
    Photographic studies: Since the Luxembourg system did not operate, the camera
        mounted in the Blossom IV-A recovered no data
    Phototube experiment: Telemetering records indicated that equipment functioned
        satisfactorily; however, desired data were not obtained, due to failure of the
        Luxembourg transmitter
    Spectrograph study: No information, due to failure of the Luxembourg transmitter
        and destruction of rocket at impact
    Soft x-ray study: Film packets were destroyed at impact
    Blossom IV-A experiment: Both means of ejecting the Blossom IV-A failed; the
        Blossom remained with the rocket and was completely demolished upon impact
    Parachute studies: Failure of the Blossom to separate from the rocket prevented
        ejection of the parachute
    Skin temperature studies: Telemetering monitoring during flight indicated normal
        operation of equipment, but information was lost because telemeter recorders
        for these channels jammed
    Common power supply experiment: Common power supply functioned satisfactorily
        throughout the flight
    Voltage breakdown experiment: The 0.1-cm gap gave a Paschen curve which was
        translated into pressure readings for the altitude range from 15 to 55 km;
        pressure compares well with accepted values. The 1-cm and 100-cm gap were
        inoperative because the stream intensity and gap area to width ration were
        detrimental for cascade ionization.
    Triangulation tests: Good trajectory during initial portion of flight

COMMENTS

    Rocket modifications Rocket carried new elongated nose section, Blossom IV-A,
        which provided from 80 to 100 cu ft of space for research instruments. Length
        of the original V-2 ws increased by one diameter.
    Rocket performance: Takeoff and flight appeared normal. However, parachute
        ejection system failed, and since no provision had been made for warhead
        blowoff other than parachute ejection system, rocket remained intact over
        complete flight.