Columbo

@columbo

active 1 week, 3 days ago
  • Columbo posted a new activity comment 1 week, 3 days ago

    Sadly the system is designed to be as difficult as possible imo I think the idea is to put as many people off as possible. What people never talk about, when discussing those who they perceive as claiming everything under the sun, is the amount of unclaimed benefit left in the system. This, in my experience, is because they make the system of…[Read more]

  • Columbo posted a new activity comment 1 week, 5 days ago

    The energy required for a change in velocity also helps to understand why the Voyager missions were fly-by affairs rather than orbital insertion and long term study. At the speeds required to escape earth and, with the gravitational assistance of some of the planets, and at the eventual approach velocity there was never any question of something…[Read more]

  • Columbo posted an update 1 week, 5 days ago

    Is the future of farming to be found in lorry containers for feeding massive cities?

    I can see the benefits of farming in confined spaces but the main cost was electricity. I can’t help feel that concept has been over complicated to needing huge amounts of energy and a need for solar power to keep costs down.

    Would it be too radical to grow in…[Read more]

    • What do you do when all the fields are full of skyscrapers?

      • Put fields on their roofs?

      • Maybe these containers could be put on rooftops as independent farmers/veg shops.

        It’s an interesting idea for colonisation in space. Would such a project work on the ISS?

    • There are all sorts of reasons why growing crops in fields is bad. These include:

      -Huge losses due to pests and diseases (and costs/ damage due to chemical treatment)

      -Water use efficiency. Not a problem in most parts of the UK, but globally a huge issue

      -Radiation use efficiency. Not necessarily a problem, but photosynthetic pigments only…[Read more]

    • This is a cool idea. You could even bury them underground in hot or cold climates and isolate the farm from harsh daily thermal cycling whilst still getting energy from the sun. All the more important as more and more regional climates go to hell.

      Eventually when low cost nuclear fusion is cracked (probably not soon…), you can then build very…[Read more]

  • Columbo posted a new activity comment 1 week, 5 days ago

    It’s not gravity itself but the energy required to accelerate the payload and the initial but decreasing propellant mass up to the required velocity to achieve a more or less stable orbit, the point where instantaneous velocity and acceleration due to gravity reach a balance. remember the formula for kinetic energy includes V squared, so the…[Read more]

    • The energy required for a change in velocity also helps to understand why the Voyager missions were fly-by affairs rather than orbital insertion and long term study. At the speeds required to escape earth and, with the gravitational assistance of some of the planets, and at the eventual approach velocity there was never any question of something…[Read more]