Too much air in the gas tank??

On 5/3/21 12:02 PM, Martin Gregorie wrote:
On Mon, 03 May 2021 09:22:58 -0600, kinsell wrote:

On 5/3/21 8:59 AM, jfitch wrote:
"Aircraft has sustained some damage..." is a masterful understatement
for a totaled aircraft. But I have to ask: what exactly is the point of
a hydrogen powered airplane? 96% of commercial hydrogen is produced
from fossil fuels, why not just use the fossil fuels? To fleece
ignorant investors I'd assume, but still....
On Monday, May 3, 2021 at 6:58:29 AM UTC-7, kinsell wrote:
https://www.avweb.com/aviation-news/...ogen-test-bed-
crashes-after-off-airport-landing/?MailingID=604

If this was a "safe, off-airport landing", I'd sure hate to see a
dangerous off-airport crash. Anytime you rip a wing off, I think that
crosses the line between the two.

It's not just ignorant investors getting fleeced, unwilling taxpayers
are the targets of these scams thanks to ignorant governments.

But some of these new projects are truly revolutionary. Take the ASKA.
Please. Here you have a car that fits in your garage, electric motors
in the wheels to run around town, and for longer trips, just push a
button and it unfolds into marvelous flying machine. For the same price
as a nice motorglider, you get six engines instead of one, with a 250
mile range, beating even a Jeta. And it does the vertical takeoff,
eliminating that annoying trip to the airport. This baby's going to be
flying next year. Since not even lithium batteries last forever, it's
got a dirty old ICE engine, but with the ever popular hydrogen option to
keep the greenie weenies happy. It's something George Jetson never
could have dreamed of. Just hope it meets California emission
standards.

https://www.youtube.com/watch?v=9TGVSoejkW4

Design, build prototype, test fly, certify, scale up into production in 5
years with apparently no hardware to show off yet? Really?

... and there's always Alauda, https://airspeeder.com/ whose only visible
progress is a crash in 2019 that attracted the AAIB's attention and
generated a scathing report from them, AAIB-25876, last year.

Meanwhile, Joby Aviation say they've been working on their flying
electric taxi for 10 years and 1000 flights, yet are only planning
certification for 2023 and starting operations in 2024.

Of these, only the latter seem likely to have an eVTOL aircraft close to
commercial operation by 2025.

In any case, since these all have unshielded rotors, what are the chances
that any of them will ever be certified for off-airfield operations?



here's another VTOL air taxi thingie, using hydrogen fuel cells. 2019
article sez they were hoping for FAA certification in 2020. You betcha.
Then the CEO says it'll be another 10 years before the service is
practical.

https://www.greenoptimistic.com/hydr...ange-20190603/


It's "fundamentally human" and "here today" (in 2019). So let's see one.