Why not ?

[lancaIV]

https://patentauction.com/patent.php?nb=14813
the inventor does not write about the electrolysis energy need  !
If efficient this technology changes the worldwide air transport sector :
beginning with small ultra-lighter
https://www.vortechonline.com/b1920/index.html

[lancaIV]

https://translate.google.com/translate?hl=de&sl=de&tl=en&u=https%3A%2F%2Fwww.wiwo.de%2Funternehmen%2Fauto%2Fiaa2019%2Fiaa-vw-chef-herbert-diess-ueber-wasserstoff-autos-das-ist-einfach-unsinn-%2F25009062.html%3Futm_source%3Dpocket-newtab
Mister Diess disst hydrogen-ic-engines  ! Not nice  ! 

AUDI experiments since more than 15 years with Synfuels as technology bridge to hydrogen engines :
Fischer-Tropsch process as GTL and CTL or windfuel or sunfuel
https://www.google.com/url?q=http://www.watergas.nu/uploaded/Fischer%2520Tropsch_Su07Uhrig_3.pdf&sa=U&ved=2ahUKEwiM84_cidHkAhVBxoUKHeivDXUQFjAFegQIBBAB&usg=AOvVaw1Nub8GFwojVrFiFLn2WKLu

Carbon fuel cycle to later water fuel cycle
water to hydrogen as energy carrier processes :

https://patentauction.com/patent.php?nb=15165
and other dormant solutions :
https://patentauction.com/search.php

From BMW some information how to convert internal combustion engines for hydrogen use :
https://www.google.com/search?q=bmw+ic-engine+to+hydrogen+conversion&ie=utf-8&oe=utf-8&client=firefox-b-m

At first for home hydrogen cogeneration-sets later on street use  !
Other hydrogen( also ammonia= NH3) processes with extra gain : solid carbon( Graphit)

https://judbarovski.livejournal.com/117497.html
https://overunity.com/14401/hydrogen-production-breakthrough/30/

             Comparison different engines systems from CO2- emission-view and without CO2- capture :

Internal combustion engines with synfuels ~ international combustion engines with hydrogen ~  electric cars

      All three engine types equipped cars have particulate ( fine dust )production  :

                 from wheels,brakes and street surface abrasion 


Related Investors in hydrogen technology with VW-interests :
https://www.telegraph.co.uk/motoring/news/7816413/Hydrogen-fuel-car-to-be-tested-on-British-roads.html
https://en.m.wikipedia.org/wiki/Hugo_Spowers
https://en.m.wikipedia.org/wiki/Riversimple

1,5 Kg hydrogen/ 300 miles ~ 250 mpg , 60 mph  velocity max ~ > 100 Km/h
Calculating with 1,50 Euros/Kg hydrogen  2030 average selling price : 0,75 Euros/100 miles fuel costs


Similar : DIY

https://rqriley.com/diy-projects-plans/                with hydrogen engine or fuel cells
https://newatlas.com/suzukis-hydrogen-powered-crosscage-motorcycle/8243/ from 2007; assuming 2005 patent priority : 2030 low cost production for home e-hydrogen plants and City e-cars

[lancaIV]

https://worldwide.espacenet.com/patent/search/family/046031491/publication/EP2690158A1?q=pn%3DEP2690158A1
After more than 6 years : granted. !
https://register.epo.org/application?number=EP12859557&tab=main
A low-carb - on demand - fuel without pure hydrogen disadvantages  !

[Toolofcortex]

Hydrogen technology is the only technology that will be suitable for airplanes. This is what Stephen Meyers was saying in his very long interview.

There can be no competition with other free energy techs, it simply does not have the power of gas to propel the air frames.

Even the James Schwatz tech will never be enough.