UPPER AIR ROCKET SUMMARY                                                                       V-2
                                                                                                                             NO. 9
IDENTIFICATION                                                                                    30 July 1946

    Agency: Applied Physics Laboratory
    Time: 1240 MST
    Altitude: 100.4 miles

UPPER AIR INSTRUMENTS

    Cosmic radiation: Two geiger counter telescopes, and Alpha Particle emulsions
    Ionosphere: Indirect ion density measurements by means of rf propagation transmitters (NRL).

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL 23 channel PPM/AM system.
    Recorder: Two steel drum recorders
    Physical recovery: Warhead separation explosives in Control Chamber

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Two Mitchell and six Askania stations
        Cameras: Three Bowen-Knapp stations
        Telescopes: One station
        Radar: One modified SCR-584 S-band radar or sub-station
        Doppler: Four stations.

    Airborne
        Beacon: AN/APN-55 (XE-2) S-Band transponder
        Doppler: DOVAP transceiver
        Radio Cutoff: AN/ARW-17. FM control receiver for command fuel cutoff.
        Other: Single roll photocell
            Routine rocket performance instruments (G. E. Co.)

ROCKET PERFORMANCE

    Firing angle: 0.0 degrees
    Program angle: 11.3 degrees
    Time to burnout: 68.6
    Altitude at burnout: 25.1 miles
    Velocity at burnout: 5130 ft. per sec.
    Time to zenith: 233 sec.
    Altitude to zenith: 100.4 miles
    Time to blowoff:
    Altitude to blowoff:
    Flight duration:
    Impact Coordinates: 68.0 miles North, 9.2 miles East
    Payload weight: 2500 lbs.
    Unfueled rocket weight: 8562 lbs.
    Unfueled rocket C.G.: 244.4 inches
    Gross weight at takeoff: 28,600 lbs.

BALLISTIC DATA

    Theodolites: Mitchell, record incomplete or irreducible; Askania trajectory data 0 to 68 sec.
    Cameras: Satisfactory reducible records
    Telescopes: Record incomplete or irreducible
    Radar: Record incomplete or irreducible
    Doppler: Record incomplete or irreducible
    Roll photocells: Questionable data.

DATA RECOVERY

    Telemeter: Good record to 160 sec
    Recorders: No record, not recovered
    Physical recovery: Warhead not recovered, but main body recovered in fair condition.

EXPERIMENTAL DATA

    Cosmic radiation: Maximum counting rate at 50 sec was 45 times greater than ground rate -
        single counter data
    Ionosphere: Internal failure of three transmitters between 44 and 75 sec., no experimental
        conclusions.

COMMENTS

    Rocket performance: Very good propulsion performance
    Experiments:

REPORTS AND PAPERS

    WSPG Preliminary Report of A-4 Rocket No. 9, Fired 30 July 1946
    "High Altitude research Using the V-2 Rocket," March 1946-April 1947, by L. W. Fraser and
        E. H. Siegler, Bumblebee Series Report No. 81, July 1948
    "V-2 Report No. 6," Minutes of Meeting of the V-2 Upper Atmosphere Research Panel on
        5 September 1946
    "Final Report, Project Hermes V-2 Missile Program," by L. D. White, Report No. R52A0510,
        General Electric Company, September 1952.

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