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  1. D

    Why battery-powered aircraft will never have significant range

    look at the y axis, it is Whr/litre which is the volumetric energy density, important for phones and laptops but a nonsense measure for aviation, it is the weight that matters. Li ion can double or treble in capacity before serious problems with swelling become very difficult to solve The...
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    Why battery-powered aircraft will never have significant range

    good plan
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    Why battery-powered aircraft will never have significant range

    Just checking 2lbs/hp hr = 1.66 KwHr/kg and 3lb/hp hr = 1.1 Kwhr/kg I hope you are still young as you could be waiting quite a while.
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    Why battery-powered aircraft will never have significant range

    if you replaced the powerlplant weight (R914 and fuel approx 180Kg max) in a S10 with battery electric then the range would be 100-150nm no more. The battery would be about 40KWHr and the endurance at around min sink would be no more than a couple of hours at 55kts (S10 is nowhere near 50:1 L/D...
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    DIY 400 year nuclear battery: Electric Aircraft Recharging Challenges Solved ;)

    The physics of thorium reactors is they actually actually breed and fission U233, Th 232+ n It is therefore impossible to bootstrap a thorium reactor with just thorium, it needs uranium or plutonium fissile material to get criticality to breed the thorium into uranium. U233 has a much...
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    Why battery-powered aircraft will never have significant range

    gas turbiine driving ac generator
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    Why battery-powered aircraft will never have significant range

    Personally I want to be able to cruise under power in the winter to where the wave is about 60nm and I want to be able to get back if the wave dumps me. I have been impresed with cross country saves using FES. Doing the math suggests that is impossible with current battery tech, which are only...
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    Why battery-powered aircraft will never have significant range

    Build a better mousetrap and the world will beat a path to your door. The current situation is more like banning all existing mousetraps and offering a only a new mousetrap which is many times more expensive and many times worse at catching mice. If the Eco technology was so wonderful and...
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    Why battery-powered aircraft will never have significant range

    patronize much? how do the solar panels get sunlight in the clouds? I expect a genius level reply because it isn't obvious. Does your wonder plane have to pick up water from clouds before it makes it into hydrogen, if so then why not carry the water from the start already carrying a bunch of...
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    Why battery-powered aircraft will never have significant range

    deleted
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    Why battery-powered aircraft will never have significant range

    you do understand that KW is a unit of power not energy? KWhr is the battery people measure of energy, Joule is the correct measure. the article you reference calls out 3KWhr/kg thought they make it sound bigger by saying 3000 Whr. their proposal requires energy to cool as well as energy to...
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    Why battery-powered aircraft will never have significant range

    I see a potential flaw in your genius plan, you are calling for a solar powered airplane that has to fly in cloud to collect water.... why don't you condense the water from the exhaust and re-use that? as some kind of airborne perpetual motion machine. Maybe get back to me when you have...
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    Why battery-powered aircraft will never have significant range

    transitional as in until Hydrogen can be fused together to make helium, when that happens none of the current tech matters at all. Until then Hydrogen is indeed just an inefficient energy carrier or store not a source. Even as a store it is pretty poor, as a compressed gas it has low volumetric...
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    Why battery-powered aircraft will never have significant range

    I'll bite....where does it get this needed hydrogen from again?
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    Wind turbines falling

    say you want low grade heat, probably the best you can hope for out of such a low differential, you need energy to pump against the thermodynamic gradient, brine filled pipes in the water extract heat causing the surrounding water to freeze, releasing latent heat of fusion and it is a lot energy...
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    The Real Culprit in Homebuilt Accidents webinar

    I wonder if the relatively poor numbers for the Cirrus is due to the POH suggesting the BRS is used in preference to outlanding and the manual suggests the decision to use the BRS is made early. Conversion training reinforces this. Recently in the UK there was an incident where a fan stopped...
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