Larry Dighera wrote in
:
Yeah. Current electric aeronautical technology is still a bit nascent.
Given the comparatively high energy density of petroleum-based aviation
fuels, it's going to be difficult to achieve comparable endurance with
any electric technology other than perhaps highly pressurized hydrogen
feeding a remarkably efficient fuel cell generator.
Liquid H: 2,600 WattHours/Liter 39,000 WattHours/Kilogram
Gasoline: 9,000 WattHours/Liter 13,500 WattHours/Kilogram
Gasoline has nearly 3.5 times more energy per volume.
Although liquid hydrogen has nearly 3 times more energy per
unit weight, that does not take into account the mass of the
containment vessel. A liquid hydrogen tank is going to more
than 3 times as massive as a gasoline tank or fuel bladder,
thus resulting in a net loss of energy per unit weight of the
fuel plus it's container.
Brian
--
http://www.earthwaves.org/forum/index.php - Earth Sciences discussion
http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism
Sed quis custodiet ipsos Custodes?