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Thread: Electric planes

  1. #51

  2. #52
    ERIC VFX vfx's Avatar
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    Very exciting!

    Now some billionaire will come and buy them out and do the world flight.

  3. #53
    Senior Member dpeilow's Avatar
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    Not electric but an interesting comparison: Phantom Eye hydrogen-powered spy plane


    96 hours or 2 weeks?
    Last edited by dpeilow; 2010-07-14 at 07:59 AM.

  4. #54
    Senior Member dpeilow's Avatar
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    Zephyr solar plane set for record endurance flight

    A UK unmanned solar-powered plane will attempt to set a remarkable new endurance record in the coming days.

    The Zephyr vehicle will launch from a military range in the US and try to fly non-stop, day and night, for two weeks.

    ...

    During the day, Zephyr uses its state-of-the-art solar cells spread across its wings to recharge high-power lithium-sulphur batteries and drive two propellers. At night, the energy stored in the batteries is sufficient to maintain Zephyr in the sky.

  5. #55
    ERIC VFX vfx's Avatar
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    Unmanned robot.

  6. #56
    Head Moderator / Administrator doug's Avatar
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    Quote Originally Posted by dpeilow View Post
    Not electric but an interesting comparison: Phantom Eye hydrogen-powered spy plane


    96 hours or 2 weeks?
    The hydrogen folks will tell you that their plane can run off solar too. They just need to carry along water, a compressor, and three times as many solar panels.

  7. #57
    Senior Member dpeilow's Avatar
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    Zephyr solar plane flies 7 days non-stop

    We have the first 'eternal plane'”
    Well, for as long as the number of lithium-sulphur charge cycles anyway.

  8. #58
    Senior Member dpeilow's Avatar
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    'Eternal plane' returns to Earth

    Zephyr took off from the Yuma Proving Ground at 1440 BST (0640 local time) on Friday, 9 July.

    After only 31 hours in the air, it had bettered the official world record for a long-duration flight by a drone; but then it kept on going, unencumbered by the need to take on the liquid fuel that sustains traditional aircraft.

    Clear skies at 60,000ft delivered copious amounts of sunshine to its amorphous silicon solar arrays, charging its lithium-sulphur batteries and keeping its two propellers turning.

    At night, Zephyr lost some altitude but the energy stored in the batteries was more than sufficient to maintain the plane in the air.

    Zephyr is set to be credited with a new world endurance record (336 hours, 24 minutes) for an unmanned, un-refuelled aircraft - provided a representative of the world air sports federation, who was present at Yuma, is satisfied its rules have been followed properly.

    Its fortnight in the sky easily beats the 30 hours, 24 minutes, set by Northrop Grumman's RQ-4A Global Hawk in 2001.

  9. #59
    mod squad TEG's Avatar
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    Last edited by TEG; 2010-12-09 at 12:31 AM.

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