Power Assisted Take-Off For Viscount Airliner -- The Vickers 'Viscoount' taking-off at Entebbe airfield during its tropical trials. The British Vickers "Viscount" airliner, the first in the world to be powered with project engines returned to Britain after completing extensive tropical and high-altitude trials in Africa. During her trials at Entebbe airfield in Uganda, the "Viscount" made several flights and the use of water-methanol was tested. This new increased power for take-off is supplied