UPPER AIR ROCKET SUMMARY                                                                       V-2
                                                                                                                           NO. 37
IDENTIFICATION                                                                                   11 June 1948

    Time of firing: 0322 MST
    Agency: Air Research and Development Command
    Altitude: 38.7 miles

UPPER AIR INSTRUMENTS

    Solar soft x-ray studies: Densitometer packets with x-ray type photographic
        film behind filters of varying thicknesses of evaporated aluminum (of the order of
        a few microns) which are opaque to visible light (AFCRC)
    Ambient pressure and temperature measurements: Two type VG-1A ionization
        pressure gages on mid-body of rocket. One Phillips pressure gage on mid-
        body of rocket. Special cannister for shock wave angle determination. (Mich. U.)
    Skin temperature experiment: Nickel temperature-sensitive elements, com
        mutated in one arm of ac resistance bridge, to sense heat change in flush-
        mounted thin steel diaphragms distributed along rocket skin (Boston U.)
    Vertical incidence ionosphere propagation experiment: Synchronized ground and
        rocketborne equipment to measure delay time of low-frequency pulse traveling
        through the E layer by comparison with travel time of undelayed high-frequency
        signal (AFCRC)
    Luxembourg experiment and artificial airglow: Intermittently pulsed "disturbing"
        transmitter, with probe to excite artificial airglow, vertical-incidence iono-
        sphere transmitter furnishing wanted signal; phototube detectors with filters
        and optical spectrograph (AFCRC)
    Sky brightness measurement experiment: Three photoelectric tubes located in nose
        section, pointed directly at Luxembourg antenna (AFCRC)

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL 23-channel telemetering system; 1025-Mc transmitter located in
        control compartment
    Physical recovery: Parachute

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Two Mitchell and eight Askania stations
        Cameras: Two ballistic and three Bowen-Knapp stations
        Telescopes: Four stations
        Radar: SCR-584, S-band
        Doppler: Four stations

    Airborne
        Beacon: Miniature beacon installed in tip of nose cone to telemeter time of
            parachute ejection and aid in tracking of nose section (AFCRC)
        Doppler: Dovap transceiver
        Radio cutoff: One ARW-37 radio receiver at 54.4 Mc located in control com-
            partment of rocket for fuel cutoff or warhead blowoff
        Other: Routine rocket performance instrumentation

ROCKET INFORMATION

    Unfueled rocket weight: 10,161 lb
    Gross weight at takeoff: 29,529 lb

ROCKET PERFORMANCE

    Program angle: Seven degrees
    Time to burnout: 57.5 sec
    Velocity at burnout: 3003 ft/sec
    Altitude at burnout: 13.1 miles
    Time to zenith: 150.5 sec
    Altitude at zenith: 38.7 miles
    Time to tail blowoff: 96 sec
    Altitude at tail blowoff: 29.8 mi. (ascending)
    Flight duration: Approximately 282 sec
    Impact coordinates: Main body - 17 mi. north; warhead - 16 mi. north

BALLISTIC DATA

    Theodolites: Askania - good operations through burnout; Mitchell - good records
        through burnout
    Cameras: Ballistic - operations very good; Bowen-Knapp - operations satisfactory
    Telescopes: Telescope I - tracker followed rocket approximately 180 sec; noted
        intermittent glow after burnout. Telescope II, N station - rocket lost in clouds
        5 or 10 sec after takeoff. Telescope III followed rocket approximately 170 sec.
    Radar: SCEL beacon radar tracked through peak
    Doppler: Good signals throughout flight

DATA RECOVERY

    Telemeter: Good telemetering record obtained for 74 sec, loss of record from 74 to
        128 sec. From 128 to 283 sec, record was intermittent.
    Physical recovery: Warhead and parachutes. One spectrograph film casette from
        rocket tail fin No. 1. Main body, intact up to impact, landed point down at high
        velocity, resulting in complete disintegration of rocket. Components scattered.

EXPERIMENTAL DATA

    Ambient pressure and temperature measurements: No pressure data obtained due
        to low altitude. No data on shock wave angle determination due to low altitude.
    Skin temperature measurement: Curves of temperature vs time for heating effects
        due to frictional dissipation between various points on the missile and adjacent
        air molecules
    Spectrograph study: No data since light source (artificially induced aurora) did not
        function
    Vertical incidence ionosphere propagation experiment: No data obtained due to
        insufficient altitude, although there was some measurable retardation at the
        maximum altitude
    Soft x-ray measurements: Two packets were recovered; in one the foil was missing,
        and the other showed pinhole fogging only
    Miniature beacon experiment: Functioned satisfactorily. Impact of the warhead was
        determined from signal received by ground stations from the beacon.
    Sky brightness measurement: No data obtained
    Luxembourg experiment and artificial airglow: No data due to failure of transmitter

COMMENTS

    Rocket performance: Takeoff apparently normal; cutoff occurred unusually early at
        57.7 sec. Warhead separated by cutoff receiver at 96 sec. Canister ejected at
        92 sec. Rocket was very stable up to time of burnout; a roll of approximately
        20 rpm started after burnout.

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