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   Non-TechAirline Discussion Board


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From: Moonray10/10/2021 8:30:31 PM
1 Recommendation   of 1700
 
Southwest Airlines weekend flight cancellations keep climbing Sunday

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From: Moonray10/13/2021 4:14:22 PM
   of 1700
 
USA Today's Update coverage:
Boeing to require shots for 125,000 US workers; US
to reopen land borders to vaccinated tourists:
COVID-19 updates.

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From: Moonray10/13/2021 4:39:42 PM
   of 1700
 
Delta Air Lines posted a $1.2 billion profit for the third
quarter on Wednesday, helped by the latest installment
of federal pandemic aid for the airline industry, but
warned that rising fuel prices will lead to a “modest”
loss in the fourth quarter.

Delta Air Lines is reporting a $1.2 billion profit for the
third quarter, thanks in large part to federal aid to help
the industry get through the pandemic

More at: Delta posts $1.2 billion profit, touts holidays

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From: Moonray10/19/2021 4:26:04 PM
1 Recommendation   of 1700
 
Delta (DAL) Raises Fuel Cost Alarm: Other Airlines to Follow?

__Symbol__Last__Change__Chg %
UAL

46.22-0.95-2.01%
SKYW

47.90-0.84-1.72%
SAVE

23.37-0.15-0.64%
LUV

49.38-0.39-0.78%
JBLU

14.90-0.06-0.40%
HA

20.42-0.32-1.54%
DAL

40.45-0.56-1.37%
ALK

56.94-0.48-0.84%
AAL

19.53-0.31-1.56%
JETS

23.09-0.25-1.07%

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To: Sam who wrote (1648)10/25/2021 3:48:53 PM
From: Moonray
1 Recommendation   of 1700
 
Unvaccinated Americans to face tighter COVID-19
testing requirements in new US travel system

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From: Moonray10/25/2021 10:48:59 PM
1 Recommendation   of 1700
 
CDC moves large European country to
its highest level of Covid-19 travel risk

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From: Moonray10/26/2021 9:31:06 PM
   of 1700
 
Federal judge rejects Southwest Airlines
pilots’ request to block vaccine mandate

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To: OldAIMGuy who wrote (1636)10/27/2021 1:20:17 PM
From: Moonray
2 Recommendations   of 1700
 
Commercial flights that fly ‘entirely on hydrogen’ planned for 2024

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To: Moonray who wrote (1657)10/27/2021 2:57:32 PM
From: TimF
2 Recommendations   of 1700
 
With the short time frame (a bit over two years to three years) and the small capacity it seems like a demonstration more than anything meaningful.

Hydrogen does have some serious advantages (in addition to what is probably the motivation, the fact that perfect burning of Hydrogen doesn't emit CO2). Its abundant in the universe, and in compounds (for example water) its abundant on Earth. It also has a lot of energy per weight.

But its difficult to handle and transport. Its density is very low. Store it as a gas and you need huge tanks. Store it as a liquid and it still needs tanks over three times as large as jet fuel or gasoline or diesel, and you also have to store it at more than 423 degrees below zero (or slightly higher with some pressure but still a cryogenic temperatures). Its escapes easily from containment so you lose some of it why you store it (even stored for use in the tank of a vehicle that's burning it) or transporting it. And when it escapes it can (depending on how its stored) cause en.wikipedia.org, or under some conditions en.wikipedia.org

Its low molecular and atomic weight and high energy to weight ratios do make it a good fuel for spacecraft (or it can be reaction mass for spacecraft that don't rely on burning it), and it has some other niche applications, but I don't think it will have any wide spread transportation use any time soon (spacecraft being a small enough proportion of transportation to not count as "wide spread").

Its use doesn't even necessarily reduce CO2 emissions because currently most hydrogen is generated from fossil fuels.

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To: TimF who wrote (1658)10/27/2021 3:25:25 PM
From: Moonray
   of 1700
 
You forgot to add that hydrogen has been tried on flights before,
some 85 years ago. You wouldn't have to show this video to a person
getting on a commercial flight more than once to allow many to change
their minds, rightly or wrongly.



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