4 ms·

> The cartridge Toyota has developed manages to do this for 5.5kg. Not bad, but not a paradigm shift, considering you have to build a logistics network to refil

> The cartridge Toyota has developed manages to do this for 5.5kg. Not bad, but not a paradigm shift, considering you have to build a logistics network to refill the cartridges. It may not a paradigm shift for cars but definitely a game-changer for aviation. Right now, there are a few experimental light aircraft powered by batteries can manage 20-30 minutes in the air. Quadruple that and you have something that's actually practical transportation.

protomyth 4y ago
AirBus has already indicated that hydrogen is their future for sustainability. At least one startup has a plan to have off-site (somewhere other than the airport) filled containers that are plugged into the aircraft instead of a normal refueling.
Robotbeat 4y ago
Electric aircraft have demonstrated flying for over an hour, and several hours is feasible. No point in these compressed hydrogen things for airplanes. The weight is just too high. Hydrogen aviation only makes sense with cryogenic hydrogen storage IMHo, and only for very long duration
- gamblor956 4y ago
  And yet aviation technology professionals who presumably know more than either of us have decided that hydrogen is the future for general commercial aviation, not electric craft.
  - Robotbeat 4y ago
    I am an aviation technology professional.
    - gamblor956 4y ago
      Clearly not, if you believe that lithium-based batteries have anywhere near the energy capacity for large aircraft.
- Dylan16807 4y ago
  > Electric aircraft have demonstrated flying for over an hour, and several hours is feasible. With massive downsides. Sure, liquid hydrogen probably makes a lot more sense for a plane than these things. But I don't think "only for very long duration" is true at all.
- jazzyjackson 4y ago
  > The weight is just too high. did OP not just point to a 4x increase in energy density?
  - Robotbeat 4y ago
    This is not a 4x increase in energy density. It’s functionally the same as high end lithium ion.

protomyth 4y ago

AirBus has already indicated that hydrogen is their future for sustainability. At least one startup has a plan to have off-site (somewhere other than the airport) filled containers that are plugged into the aircraft instead of a normal refueling.

Robotbeat 4y ago

Electric aircraft have demonstrated flying for over an hour, and several hours is feasible. No point in these compressed hydrogen things for airplanes. The weight is just too high. Hydrogen aviation only makes sense with cryogenic hydrogen storage IMHo, and only for very long duration

gamblor956 4y ago
And yet aviation technology professionals who presumably know more than either of us have decided that hydrogen is the future for general commercial aviation, not electric craft.
- Robotbeat 4y ago
  I am an aviation technology professional.
  - gamblor956 4y ago
    Clearly not, if you believe that lithium-based batteries have anywhere near the energy capacity for large aircraft.
Dylan16807 4y ago
> Electric aircraft have demonstrated flying for over an hour, and several hours is feasible. With massive downsides. Sure, liquid hydrogen probably makes a lot more sense for a plane than these things. But I don't think "only for very long duration" is true at all.
jazzyjackson 4y ago
> The weight is just too high. did OP not just point to a 4x increase in energy density?
- Robotbeat 4y ago
  This is not a 4x increase in energy density. It’s functionally the same as high end lithium ion.