Electric Motorcycle Armchair Engineers Discussion Thread. Truths, Half-truths, and Myths.

Discussion in 'Electric Motorcycles' started by T.S.Zarathustra, Mar 22, 2019.

  1. wheresbaoskee

    wheresbaoskee Been here awhile

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    And yet cars and motorcycles continue to get faster and faster. Watch any IMSA or WEC racing latey? Records getting smashed quite frequently the last few seasons.

    Clarkson, and I say this as a massive Top Gear fanboy, is almost a satirist in the extreme when discussing anything that isn't a car, and sometimes even then. Read some of his writing, particularly his piece from about a decade ago about how "safe" it is to travel in Jo-berg. Certainly a brilliant man, but an entertainer first and foremost.

    Remember, his "presenter persona" is still adamantly against EVs. Would be quite interesting to sit down with a few beers and hear his personal thoughts without having to maintain the persona.
  2. magnussonh

    magnussonh Adventurer

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  3. T.S.Zarathustra

    T.S.Zarathustra Been here awhile

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    10. We are running out of "DynoJuice" so we have to switch to electric power.

    Contrary to popular belief there is plenty of fossil fuel left. There is enough oil and gas in the ground to last at least 50 years, and enough coal to last 150 years. With current usage. New oil fields are being discovered. New methods of getting more oil from previously thought to be dried up oil wells are being utilised. So these numbers should increase. If we would run out of fossil fuels we could always convert cars to run on alcohol and trucks to run Biodiesel. Ships and airplanes can also switch to Bio-fuels with relatively minor modifications. Switching to electric power is not because we are running out of fossil fuel, it is more to save our planet.

    There are few problems with fossil fuels. They pollute, both when being processed and when used. We are using more and more energy per person, so the numbers above will get lower. Making alcohol and Biodiesel uses farmland that would normally be used for food production, causing food prices to rise. As fossil fuel level in the ground gets lower it gets more expensive to make petrol and gas. And perhaps the most important part, our over reliance on fossil fuels is causing some pretty serious global warming.
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  4. MJSfoto1956

    MJSfoto1956 Been here awhile

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    We are running out of CHEAP-TO-EXTRACT DynoJuice. While there is plenty of oil still in the ground, getting to it is increasingly costly and risky. This is why the "tipping point" is right around the corner: adoption of EVs will all be about value not principals.
  5. Mambo Dave

    Mambo Dave I cannot abide.

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    [​IMG]

    1915 electric car
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  6. MJSfoto1956

    MJSfoto1956 Been here awhile

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    Waaaay ahead of their time...
  7. ctromley

    ctromley Been here awhile

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    Those ran on the Edison nickel-iron battery. Not a great performer by today's standards of course, but they never wear out. Just replace the pig intestine membrane separators occasionally and refresh the electrolyte (basic, not acid I think) and you're good to go.

    I've read that Edison was not really that great a scientist, but he was certainly a relentless experimenter. If only he had kept tinkering he might have evolved the beginnings of the modern nickel-metal-hydride battery. Imagine how our transportation landscape would look today if he had....

    Our successes are obvious. It's harder to comprehend what we've let slip through our fingers for lack of a bit more vision and effort - but it's still a loss.
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  8. T.S.Zarathustra

    T.S.Zarathustra Been here awhile

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    11. If you put a small windmill, or dynamo, on your electric motorcycle you can go further on a charge.

    If you put a windmill or dynamo on your bike, it will cause extra drag. You'd need to use more throttle to overcome the extra drag, so you can maintain speed. Law of energy conversion, that "a system can never be 100% efficient", dictates that there's more energy used to overcome the drag created by the windmill or dynamo, than they can create. So the net effect is shorter range.
    A possible way to create energy by bike movement is by harvesting energy in the movement of the suspension. The energy harvested will be small, and barely worth it. On the other hand, if the system would be used to create active suspension, handling could improve.
    You can also put solar cells on the bike. Again, barely worth it. Regular bikes have small surface area, and solar cells are not very effective. You get about 15W per square foot from run of the mill solar cells. Put 2 square feet on your bike, leave it in bright sun for 10 hours and you'll get 0.3 kWh. Zero goes about 10 miles on 1 kWh, so 0.3 would give you 3 miles per day. A two hour ride in the sun would give you up to, and maybe a little over, half a mile range.
    Magnussohn's post/link above, regarding efficiency, is IMHO much better solution. I've mentioned that few times before:pope. Increasing the efficiency of the Zero mentioned above, for example by adding a fairing, will give you much better improvement in range than any other method I've mentioned here, or even all of them combined. 10% efficiency increase, by adding a fairing, will give you 10-15 miles extra range on a charge. Being very careful with the throttle, and drive slower, will double that.
    magnussonh likes this.
  9. liberpolly

    liberpolly Nu, shoyn, nudnick!

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    I want to know how the fuck did it even come up!