UPPER AIR ROCKET SUMMARY                                                                       V-2
                                                                                                                             NO. 7
IDENTIFICATION                                                                                      9 July 1946

    Agency: General Electric Company
    Time: 1230 MST
    Altitude: 83.5 miles

UPPER AIR INSTRUMENTS

    Cosmic radiation: Four packages of cosmic ray emulsions
    Ionosphere: Indirect ion density measurements with rf propagation transmitters (NRL).
    Biological: Selected seeds. (Harvard University).

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL 22 channel PPM/AM system.
    Physical recovery: Ejection mechanism with drag plates (NRL).

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Two Mitchell and two Askania stations
        Cameras: Two Bowen-Knapp stations
        Touching Telescopes: One station
        Radars: Modified SCR-584 S-band radar
        Doppler: Four stations.

    Airborne
        Beacon: APN-55 (XE-2) 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)
            Routine rocket performance instrumentation

ROCKET PERFORMANCE

    Firing angle: 0.0 degrees
    Program angle: 12.4 degrees
    Time to burnout: 60.6 sec.
    Altitude at burnout: 19.5 miles
    Velocity at burnout: 4680 ft. per sec.
    Time to zenith: No data
    Altitude to zenith: 83.5 miles
    Time to blowoff:
    Altitude to blowoff:
    Flight duration: 402 sec.
    Impact Coordinates: 61.0 miles north, 1.0 miles east
    Payload weight: 2050 lbs.
    Unfueled rocket weight: 8977 lbs.
    Unfueled rocket C.G.: 240.9 inches
    Gross weight at takeoff: 27,850 lbs.

BALLISTIC DATA

    Theodolites: Good results form Mitchell and Askanias
    Cameras: Good results from Bowen-Knapp
    Telescope: Records incomplete or irreducible
    Radar: Trajectory coordinates, 0 to 402 sec.
    Doppler: Very poor, weak signal
    Impact location: Air and ground search.

DATA RECOVERY

    Telemeter: Good signal throughout trajectory
    Physical recovery: Fragments of ejection block up to 0.5 mi. form rocket impact. Emulsions,
        seeds badly damaged, unusable.

EXPERIMENTAL DATA

    Cosmic radiation: No data, emulsions destroyed at impact
    Ionosphere: No significant data, last signal received from rocket 70 sec. after takeoff.

COMMENTS

    Rocket performance: Good propulsion, terminated by rocket timer, actual trajectory angle
        greater than preset program angle.

REPORTS AND PAPERS

    WSPG Preliminary Firing Report, A-4 Rocket No. 7, Fired 9 July 1946
    Telemetering data, DF-71393 G. E. Rocket No. 3, 9 july 1946.
    "V-2 Report No. 5," Minutes of meeting of the V-2 Upper Atmosphere Research Panel on
        9 July 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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