A plane fuelled by liquid hydrogen has made its first piloted flight, in what its German owners called a “watershed moment” in the drive to clean up aviation.
The aircraft, known as HY4, took off from Slovenia on four low-altitude test flights carrying a hydrogen fuel tank made by French company Air Liquide.
German operator H2Fly believes the four-seater plane could fly about 1,500 kilometres, a short-haul flight about the distance from London to Rome. One of its test flights lasted three hours.
Longer flights are limited by the large volume of hydrogen that would be needed, and the low-carbon fuel is currently expensive to use.
But the industry is looking at hydrogen as one way to reduce its carbon emissions alongside synthetic fuels and small battery-powered aircraft.
The H2Fly test aircraft, which took off from Maribor, north-east Slovenia, has an engine that converts liquid hydrogen into electricity.
This was “safe and efficient”, the company said on Thursday.
“This achievement marks a watershed moment in the use of hydrogen to power aircraft,” said H2Fly's founder Josef Kallo.
“We are now looking ahead to scaling up our technology for regional aircraft and other applications, beginning the critical mission of decarbonising commercial aviation.”
Hydrogen produces only water vapour – rather than carbon dioxide – when it is burnt in a fuel cell.
It first has to be hived off from water. Only if this is done in a low-carbon way is it known as green hydrogen. Aviation accounts for about two per cent of global carbon dioxide emissions.
Major aviation players such as Airbus and Rolls-Royce are taking steps into the hydrogen market. Rolls-Royce and easyJet carried out ground tests on a hydrogen jet engine last year.
H2Fly, which is owned by US company Joby Aviation, said tests had shown liquid hydrogen doubled the aircraft's range compared to storing it as pressurised gas.
Liquid hydrogen has to be cooled to below minus 250°C.
The German company now wants to enter the commercial market by developing an engine for altitudes of more than 8,000m.
Pierre Crespi, Air Liquide director of innovation, said the flight test “demonstrates the full potential of liquid hydrogen for aviation”.
“Hydrogen is key to the energy transition and this new step proves that it’s already becoming a reality,” he said.
Killing of Qassem Suleimani
Test
Director: S Sashikanth
Cast: Nayanthara, Siddharth, Meera Jasmine, R Madhavan
Star rating: 2/5
Winners
Best Men's Player of the Year: Kylian Mbappe (PSG)
Maradona Award for Best Goal Scorer of the Year: Robert Lewandowski (Bayern Munich)
TikTok Fans’ Player of the Year: Robert Lewandowski
Top Goal Scorer of All Time: Cristiano Ronaldo (Manchester United)
Best Women's Player of the Year: Alexia Putellas (Barcelona)
Best Men's Club of the Year: Chelsea
Best Women's Club of the Year: Barcelona
Best Defender of the Year: Leonardo Bonucci (Juventus/Italy)
Best Goalkeeper of the Year: Gianluigi Donnarumma (PSG/Italy)
Best Coach of the Year: Roberto Mancini (Italy)
Best National Team of the Year: Italy
Best Agent of the Year: Federico Pastorello
Best Sporting Director of the Year: Txiki Begiristain (Manchester City)
Player Career Award: Ronaldinho
Killing of Qassem Suleimani
Cryopreservation: A timeline
- Keyhole surgery under general anaesthetic
- Ovarian tissue surgically removed
- Tissue processed in a high-tech facility
- Tissue re-implanted at a time of the patient’s choosing
- Full hormone production regained within 4-6 months
UAE currency: the story behind the money in your pockets
Financial considerations before buying a property
Buyers should try to pay as much in cash as possible for a property, limiting the mortgage value to as little as they can afford. This means they not only pay less in interest but their monthly costs are also reduced. Ideally, the monthly mortgage payment should not exceed 20 per cent of the purchaser’s total household income, says Carol Glynn, founder of Conscious Finance Coaching.
“If it’s a rental property, plan for the property to have periods when it does not have a tenant. Ensure you have enough cash set aside to pay the mortgage and other costs during these periods, ideally at least six months,” she says.
Also, shop around for the best mortgage interest rate. Understand the terms and conditions, especially what happens after any introductory periods, Ms Glynn adds.
Using a good mortgage broker is worth the investment to obtain the best rate available for a buyer’s needs and circumstances. A good mortgage broker will help the buyer understand the terms and conditions of the mortgage and make the purchasing process efficient and easier.
Indoor cricket in a nutshell
Indoor Cricket World Cup – Sep 16-20, Insportz, Dubai
16 Indoor cricket matches are 16 overs per side
8 There are eight players per team
9 There have been nine Indoor Cricket World Cups for men. Australia have won every one.
5 Five runs are deducted from the score when a wickets falls
4 Batsmen bat in pairs, facing four overs per partnership
Scoring In indoor cricket, runs are scored by way of both physical and bonus runs. Physical runs are scored by both batsmen completing a run from one crease to the other. Bonus runs are scored when the ball hits a net in different zones, but only when at least one physical run is score.
Zones
A Front net, behind the striker and wicketkeeper: 0 runs
B Side nets, between the striker and halfway down the pitch: 1 run
C Side nets between halfway and the bowlers end: 2 runs
D Back net: 4 runs on the bounce, 6 runs on the full
Tearful appearance
Chancellor Rachel Reeves set markets on edge as she appeared visibly distraught in parliament on Wednesday.
Legislative setbacks for the government have blown a new hole in the budgetary calculations at a time when the deficit is stubbornly large and the economy is struggling to grow.
She appeared with Keir Starmer on Thursday and the pair embraced, but he had failed to give her his backing as she cried a day earlier.
A spokesman said her upset demeanour was due to a personal matter.
Try out the test yourself
Q1 Suppose you had $100 in a savings account and the interest rate was 2 per cent per year. After five years, how much do you think you would have in the account if you left the money to grow?
a) More than $102
b) Exactly $102
c) Less than $102
d) Do not know
e) Refuse to answer
Q2 Imagine that the interest rate on your savings account was 1 per cent per year and inflation was 2 per cent per year. After one year, how much would you be able to buy with the money in this account?
a) More than today
b) Exactly the same as today
c) Less than today
d) Do not know
e) Refuse to answer
Q4 Do you think that the following statement is true or false? “Buying a single company stock usually provides a safer return than a stock mutual fund.”
a) True
b) False
d) Do not know
e) Refuse to answer
The “Big Three” financial literacy questions were created by Professors Annamaria Lusardi of the George Washington School of Business and Olivia Mitchell, of the Wharton School of the University of Pennsylvania.
Answers: Q1 More than $102 (compound interest). Q2 Less than today (inflation). Q3 False (diversification).
The biog
Title: General Practitioner with a speciality in cardiology
Previous jobs: Worked in well-known hospitals Jaslok and Breach Candy in Mumbai, India
Education: Medical degree from the Government Medical College in Nagpur
How it all began: opened his first clinic in Ajman in 1993
Family: a 90-year-old mother, wife and two daughters
Remembers a time when medicines from India were purchased per kilo
