UPPER AIR ROCKET SUMMARY                                                                       V-2
                                                                                                                           NO. 29
IDENTIFICATION                                                                                    10 July 1947

    Time of firing: 1218 MST
    Agency: Naval Research Laboratory
    Altitude: 10.1 miles

UPPER AIR INSTRUMENTS

    Density-pressure-temperature: Pressure gages on tail section ahead of fins
    Cosmic radiation: Geiger-counter telescope
    Ionosphere: Ion probe at nose tip. Generating voltmeter (electric field) at
        midsection.
    Other: Simulant agent experiment - Camp Detrick, Indiana, seed containers in
        control chamber - Harvard College Observatory

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL PXTA-501, 23-channel pulse sequential system
    Airborne recorder: NRL 13-channel neon lamp photographic recorder
    Physical recovery: Warhead separation explosives in control chamber

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Two Mitchell and six Askania stations
        Cameras: Two ballistic stations and three Bowen-Knapp stations
        Telescopes: Two stations
        Radar: Two modified SCR-584's
        Doppler: Four stations

    Airborne
        Beacon: AN/APN-55 (XE)
        Doppler: Dovap transceiver
        Radio Cutoff: AN/ARW-37 command cutoff and blowoff
        Other: Roll, pitch, and yaw gyroscopes in control chamber consolidated
            vibration pickup in control chamber. Three GSAP 16-mm cameras on tail
            fins. Prism flame spectrograph on tail fin.
            Range safety sky screens

ROCKET INFORMATION

Unfueled rocket weight: 9522 lb
    Unfueled rocket C. G.: 241.8 in.
    Gross weight at takeoff: 28,187 lb

ROCKET PERFORMANCE

    Program angle: Five degrees
    Time to burnout: 32 sec
    Velocity at burnout: 1525 ft/sec
    Altitude at burnout: 24,800 ft
    Time to zenith: 76 sec
    Altitude at zenith: 10.1 miles
    Flight duration: 138 sec
    Impact coordinates: 1.4 mi. north, 0.96 mi. east

BALLISTIC DATA

    Theodolites: Trajectory data from 0 to 138 sec
    Cameras: Trajectory data throughout field of view of camera
    Telescopes: Altitude data from 0 to 138 sec
    Radar: Trajectory data from 0 to 138 sec
    Doppler: Velocity and position data from 39  to 136 sec
    Impact location: Optical and radar bearings at impact
    Other: Vibration: Frequencies detected between 36 and 40 cps. At 40 cps peak
        acceleration 1.17g - probable error +/-20%. Vibration only during powered flight.

DATA RECOVERY

    Physical recovery: No recovery. The rocket struck intact with about half the
        propellants aboard. The explosion destroyed everything.

EXPERIMENTAL DATA

    No new data were obtained from this firing due to the low peak altitude

COMMENTS

    Rocket performance: Shortly after takeoff the rocket attained yaw to the east.
        Propulsion cutoff was initiated at 32 sec when it was determined the rocket
        would land outside the range if allowed to continue in powered flight. Faulty
        control system. First firing from new launching position. Bearing to impact,
        38 degrees east of north.

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