On Wed, Jul 1, 2020 at 9:15 PM Henry Spencer <hspencer@xxxxxxxxxxxxx> wrote:
On Wed, 1 Jul 2020, Craig Fink wrote:
...The Hydrogen is extremely low mass, to be spread by
the speeding quadcopter(s) into a design to produce a wonderful display.
Ignited to produce a dazzling light and sound display.
Too bad hydrogen flames in air emit almost no visible light.
<https://h2tools.org/bestpractices/hydrogen-flames> shows hydrogen andWhat does cost have to do with The Fourth? But Hydrogen is much Cheaper,
propane flames side by side, by day and by night. In daylight you just
can't see the hydrogen flame at all. At night you can, but it's a dim
pale ghost of a thing beside the propane flame. (Not to mention propane
being much cheaper, easier to get, and simpler to work with...)