UPPER AIR ROCKET SUMMARY                                                                       V-2
                                                                                                                             NO. 4
IDENTIFICATION                                                                                   29 May 1946

    Agency: General Electric Company
    Time: 1410 MST
    Altitude: 69.7 miles

UPPER AIR INSTRUMENTS

    Cosmic Radiation: Single geiger counter (APL).

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL 11 channel PPM/AM system.

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Two Mitchell and three Askania stations
        Cameras: Two Bowen-Knapp stations
        Radars: Two SCR-584, and two AN/MPQ-2 stations.
        Doppler: Four stations.

    Airborne
        Beacon: APN-55 S-Band transponder
        Doppler: DOVAP transceiver
        Radio Cutoff: AN/ARW-17. FM control receiver for command fuel cutoff.
        Other: X-Band crossjet attenuation transmitter and receiver (NRL)
                    Attitude Gyros
                    Longitudinal accelerometer
                    Routine rocket performance instruments.

ROCKET PERFORMANCE

    Firing angle: 0.0 degrees
    Program angle: 9.9 degrees
    Time to burnout: 60.2/63.1 sec.
    Altitude at burnout: 19.2 miles
    Velocity at burnout: 4100 ft. per sec.
    Time to zenith: No data
    Altitude to zenith: 69.7 miles
    Time to blowoff: No blowoff installation
    Altitude to blowoff:
    Flight duration: 348 sec.
    Impact Coordinates: 37.6 miles north, 13.5 miles west
    Payload weight: 2200 lbs.
    Unfueled rocket weight: 8696 lbs.
    Unfueled rocket C.G.: Approx. 241 inches
    Gross weight at takeoff: 27,800 lbs.

BALLISTIC DATA

    Theodolites: Askania, trajectory 0 to 348 sec; Mitchell, trajectory 0 to 348 sec.
    Cameras: Bowen-Knapp, trajectory 0 to 348 sec.
    Radar: Beacon operation until final part of trajectory
    Doppler: Data taken successfully
    Impact location: By air and ground search
    Other: No report of data.

DATA RECOVERY

    Telemeter: Total recording time 280 sec., operation sporadic at times
    Physical recovery: Rocket struck intact. Recoverable specimens from crater and radius
        of 100 yards.

EXPERIMENTAL DATA

    None recorded.

COMMENTS

    Rocket performance: Normal flight, rocket drift 13 miles to west possibly due to high
        altitude winds. Roll rate 6 rpm. Propulsion terminated in two stages by rocket integrator.
    Ballistic instruments: Automatic radar tracking inferior to optical directing.

REPORTS AND PAPERS

    Project Hermes Report No. 17, May 1946
    WSPG Firing Report of No. 4 A-4 Fired 29 May 1946
    "V-2 Report No. 4" Minutes of V-2 Upper Atmosphere Research Panel on 3 June 1946.
    "Final Report, Project Hermes V-2 Missile Program," by L. D. White, Report No. R52A0510,
        General Electric Co., September 1952.

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