Timeline for Can commercial aircraft harvest CO2 usefully and economically inflight?
Current License: CC BY-SA 4.0
3 events
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| Jan 31, 2023 at 16:35 | comment | added | Chris H | I guess this is for regenerative braking on trains without overhead or 3rd rail power. Because in those, regen braking power goes back to the grid. Other forms of energy storage like flywheels or compressed air could also be used on wheels, but none of them in the air | |
| Jan 25, 2023 at 12:13 | comment | added | GremlinWranger | @EdwardHogan per the link, if you double your speed, the drag your engines have to overcome goes up by four, speed increase by four is drag by 16 (4*4=16), so any drag from the ductwork on a plane is burning something like 16 times the fuel the same duct would on a train. Clever design helps but why not do the same clever design on the train... Putting intake/exhuast on the wings is generally not a good idea since messing with the airflow will reduce lift. | |
| Jan 21, 2023 at 13:31 | history | answered | GremlinWranger | CC BY-SA 4.0 |