Time of firing: 0640 MST
    Agency: University of Michigan for SCEL
    Altitude: 89.5 miles

UPPER AIR INSTRUMENTS

    Density-pressure-temperature: Twelve grenades (SCEL). Four plonium alphatrons
        to provide pressure measurement from atmospheric pressure to 5 mm Hg (Mich.
        U.). Four Pirani gages - pressures from 5 to 0.01 mm Hg (Mich. U.).
    Composition: Three evacuated air-sampling bottles with associated timer and pyro-
        technic openers and sealers
    Cosmic radiation: Two Geiger counter telescopes (NRL)
    Solar radiation: One solar spectrograph (NRL)

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL 23-channel PPM-AM system
    Airborne recorder: Three heliograph cameras in fins of tail section
    Physical recovery: Warhead and tail separation with primer cord and TNT.
        Forward separation at base of instrument compartment.

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Three Mitchell and seven Askania stations
        Cameras: Three Bowen-Knapp and two ballistic stations
        Telescopes: Four stations
        Radar: Two modified SCR-584 S-band stations
        Doppler: Four stations

    Airborne
        Beacon: AN/APN-55 S/band transponder
        Doppler: T-4 Dovap transceiver
        Radio Cutoff: AN/ARW-17 FM control receiver for command fuel cutoff and
            recovery blowup
        Other: Routine rocket propulsion and control performance (G. E.)

ROCKET INFORMATION

    Payload weight: About 2200 lb
    Unfueled rocket weight: 9742 lb
    Gross weight at takeoff: 29,100 lb

ROCKET PERFORMANCE

    Firing angle: Vertical
    Program angle: Seven degrees (radar)
    Time to burnout: 69.3 sec
    Velocity at burnout: 4682 ft/sec
    Altitude at burnout: 123,000 ft
    Time to zenith: 220.3 sec
    Altitude at zenith: 89.5 miles
    Time to tail blowoff: 298 sec
    Altitude at tail blowoff: 71.5 miles
    Impact Coordinates: 47.3 mi. at 357 degrees from launcher (radar) 55 mi. north
        (heliograph) estimated

BALLISTIC DATA

    Theodolites: Askania camera operations normal 0 to 69 sec, Mitchell-trajectory
        data 16 to 372 sec, uncorrected after 67 sec
    Cameras: Bowen-Knapp operations normal. Ballistic - good photographs, poor
        synchronization
    Telescopes: Poor images Station I form 0 to 70 sec, spectro record 0 to 100 sec
        Station II, Station IV tracked throughout flight, poor images
    Radar: Trajectory data from 0 to 372.5 sec (automatic track 372.5 to 476.5 sec
        (manual track)
    Doppler: Trajectory data from 8.5 to 298.0 sec from triplets KFB, FGB, and FGK
    Aspect: Heliograph attitude and aspect graphical data from 0 to 370 sec

DATA RECOVERY

    Telemeter: Pressure measurements: Channels 16 through 21. No data on chan-
        nels 18 and 19. Bottle opening and closing signals on channel 23 - channel
        inactive - no signals
    Physical recovery: Air-sampling bottles thrown clear on impact and recovered in
        excellent condition.
            The three heliograph cameras were recovered in a more or less battered
        condition; a cursory examination indicated useful information from all units.

EXPERIMENTAL DATA

    No air samples - pyrotechnic openers failed to fire.
            Although some of the pressure gages operated, because of the large
        instrumental errors and the incompleteness of the data, the calculations of
        pressure and temperature were of little value. Six of 12 grenades were
        observed to be ejected.

COMMENTS

    Rocket performance: Excellent, no roll
    Other: Three attempts to launch V-2, 25 were made in the year preceding the final
        successful attempt

REPORTS AND PAPERS

    "Atmospheric Phenomena at High Altitudes," L. M. Jones and H. W. Neill, Enginer-
        ing Research Institute, University of Michigan, Final Progress Report, Contract
        W-36-039 sc-32307, Oct. 31, 1950