Mobility
Recumbents
Fateba L1 Longrider
Street Machine Gt Shortrider
Roulandt Longrider
EBikes
E-Motion California
Flyer C8
E-Pfeil
Diamond Frame Bicycles
MTB Kuwahara
Cyco Compact 28TR
Mobility Diary


    "For to be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others."

    Nelson Mandela
    from "Long Walk to Freedom" 1995

    Mobility Diary

    Tag <Airplane>

    Check also other posts with other tags.

    2010/07/11
    Solar Powered Airplane: Solar Impulse
    last edited 2010/07/11 09:10 (*)

    In a century which brought a lot of invention about mobility, recent developments only pretend to be real innovations, but mostly refinements of existing ideas, concepts and realizations. Solar Impulse project around Bertrand Piccard is such a project.


    Solar Impulse Plans


    Solar Impulse (Illustration)


    Solar Impulse Test Flight

    General characteristics

    • Crew: 1
    • Payload: Lithium-ion batteries: 450 kg, (capacity: 200 Wh/kg = 90 KWh)
    • Length: 21.85 m (71.7 ft)
    • Wingspan: 63.4 m (208 ft)
    • Height: 6.40 m (21.0 ft)
    • Wing area: 11,628 photovoltaic cells: 200 m2 (2,200 sq ft)
    • Loaded weight: 1600 kg (3,500 lb)
    • Max takeoff weight: 2000 kg (4,400 lb)
    • Powerplant: 4 electric motors, 7.5 kW (10 HP) each
    • Take-off speed: 35 kilometres per hour (22 mph)

    Performance

    • Cruise speed: 70 kilometres per hour (43 mph)
    • Endurance: 36 hours (projected)
    • Service ceiling: 8,500 m (27,900 ft) Maximum altitude: 12,000 metres (39,000 ft)


    Wingspan Comparison of Solar Impulse vs Airbus 380

    The wingspan comparison and weight comparison shows the key of energy efficiency: weight. Regardless in air or surface, the weight is a major factor as pointed out in other postings here. To build a 1600kg airplane where the batteries already use up 25% of the weight reveals also the main problem: storing (electric) energy, and currently (2010) electricity is stored in batteries, and those still impose a high weight cost.

    I hope the research around Solar Impulse provides also new insights of efficiency of ground mobility and vice-versa.

    Links



    Check also other posts with other tags.


    [ post new entry ] (only for administators)

    Title:

    Text:

    Tags: (separated by commas)

    Date (optional):

    Password:
     


    .:.




    Copyright 2007-2014 © by René K. Müller <spiritdude@gmail.com> / Google+
    Illustrations and graphics made with Inkscape, GIMP and Tgif