Gulfstream partnered with Nasa to test the Quiet Spike retractable nose tip, which changes the shape of a traditional sonic boom pressure wave. Courtesy Nasa
Gulfstream partnered with Nasa to test the Quiet Spike retractable nose tip, which changes the shape of a traditional sonic boom pressure wave. Courtesy Nasa

So much quieter than Concorde



If you were standing on the ground, and a Gulfstream supersonic business jet of the future, fitted with its patented “quiet spike” flew overhead at Mach 1.8 – that’s one point eight times the speed of sound – you would barely hear it whisper.

Until now, any jet breaking the sound barrier would normally generate a boom loud enough to frighten the children and a shockwave severe enough to rattle the windows.

But over a decade of research by plane makers such as Gulfstream Aerospace is now starting to deliver the technology necessary to make commercial supersonic flight a reality once again – if only in the private jet market.

Key to their work has been the design of the jet’s nose and engine nacelles, the outer casing that encloses the engine core, which are the surfaces that effectively stretch and then tear the air ahead of the aircraft as it passes through the sound barrier at 1,220kph, otherwise known as Mach 1.

Gulfstream’s Quiet Spike is essentially a retractable nose tip that changes the shape of a traditional sonic boom pressure wave as it builds up in front of the jet so that when it passes Mach 1, the “boom” is quieter than the thunderclap made by Concorde by a factor of 10,000, according to Gulfstream.

“We’ve essentially taken the boom out of sonic boom,” according to a Gulfstream spokesman. “[The boom] is so indistinct that most people on the ground wouldn’t even realise a supersonic aircraft had passed overhead.”

Gulfstream has also patented an engine design that contributes to addressing the acoustic signature of supersonic flight, by shaping the nacelle to reduce sonic-boom strength, and drag on the jet’s airframe.

Drag is another problem. As an aircraft approaches supersonic speed, the pressure wave it generates creates drag. To offset the drag, the aircraft engine needs to create extra thrust and that dramatically boosts fuel consumption. An aircraft accelerating from Mach 0.085 to Mach 1.7 will quadruple its fuel consumption.

However, Preston Henne, a Gulfstream executive, said the company’s work on the Rolls-Royce Tay engines powering the current G450 business jet is a viable option for supersonic speed. The Tay is a modified Spey engine, designed for the Royal Air Force to power its McDonnell Douglas F-4 Phantom squadrons in the 1970s. Another engine option is the Rolls-Royce BR725 engine installed on the Gulfstream G650.

Nasa is also confident that routine supersonic overland flight is within reach. The breakthrough is expected, however, to prove taxing for regulators as supersonic flight is banned over many countries.

Wind-tunnel tests last year of Boeing and Lockheed Martin concepts for small supersonic airliners showed aircraft can now be designed that combine both low boom and low drag.

Until now “boom” and good performance have been mutually exclusive, but, “we have broken that paradox,” said Peter Coen, manager of Nasa’s supersonic fixed-wing programme. “We achieved low boom with good supersonic-cruise lift-to-drag ratio.”

Gulfstream is not alone in seeking to bring a supersonic business jet to market.

"There's been an industry push to bring supersonics to the forefront of research to develop a sonic-boom standard and a rule governing environmentally efficient supersonic flight over land," the Gulfstream spokeswoman Heidi Fedak said. "The need for speed, the next technological step in air travel, is also driving research," she added.

dblack@thenational.ae

How much sugar is in chocolate Easter eggs?
  • The 169g Crunchie egg has 15.9g of sugar per 25g serving, working out at around 107g of sugar per egg
  • The 190g Maltesers Teasers egg contains 58g of sugar per 100g for the egg and 19.6g of sugar in each of the two Teasers bars that come with it
  • The 188g Smarties egg has 113g of sugar per egg and 22.8g in the tube of Smarties it contains
  • The Milky Bar white chocolate Egg Hunt Pack contains eight eggs at 7.7g of sugar per egg
  • The Cadbury Creme Egg contains 26g of sugar per 40g egg
The specs
Engine: 4.0-litre flat-six
Power: 510hp at 9,000rpm
Torque: 450Nm at 6,100rpm
Transmission: 7-speed PDK auto or 6-speed manual
Fuel economy, combined: 13.8L/100km
On sale: Available to order now
Price: From Dh801,800
Where can I submit a sample?

Volunteers can now submit DNA samples at a number of centres across Abu Dhabi. The programme is open to all ages.

Collection centres in Abu Dhabi include:

  • Abu Dhabi National Exhibition Centre (ADNEC)
  • Biogenix Labs in Masdar City
  • Al Towayya in Al Ain
  • NMC Royal Hospital in Khalifa City
  • Bareen International Hospital
  • NMC Specialty Hospital, Al Ain
  • NMC Royal Medical Centre - Abu Dhabi
  • NMC Royal Women’s Hospital.
Overview

Cricket World Cup League Two: Nepal, Oman, United States tri-series, Tribhuvan University, Kathmandu

Fixtures
Wednesday February 5, Oman v Nepal
Thursday, February 6, Oman v United States
Saturday, February 8, United States v Nepal
Sunday, February 9, Oman v Nepal
Tuesday, February 11, Oman v United States
Wednesday, February 12, United States v Nepal

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Key facilities
  • Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
  • Premier League-standard football pitch
  • 400m Olympic running track
  • NBA-spec basketball court with auditorium
  • 600-seat auditorium
  • Spaces for historical and cultural exploration
  • An elevated football field that doubles as a helipad
  • Specialist robotics and science laboratories
  • AR and VR-enabled learning centres
  • Disruption Lab and Research Centre for developing entrepreneurial skills
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Company Profile 

Founder: Omar Onsi

Launched: 2018

Employees: 35

Financing stage: Seed round ($12 million)

Investors: B&Y, Phoenician Funds, M1 Group, Shorooq Partners

Three ways to limit your social media use

Clinical psychologist, Dr Saliha Afridi at The Lighthouse Arabia suggests three easy things you can do every day to cut back on the time you spend online.

1. Put the social media app in a folder on the second or third screen of your phone so it has to remain a conscious decision to open, rather than something your fingers gravitate towards without consideration.

2. Schedule a time to use social media instead of consistently throughout the day. I recommend setting aside certain times of the day or week when you upload pictures or share information. 

3. Take a mental snapshot rather than a photo on your phone. Instead of sharing it with your social world, try to absorb the moment, connect with your feeling, experience the moment with all five of your senses. You will have a memory of that moment more vividly and for far longer than if you take a picture of it.

Blackpink World Tour [Born Pink] In Cinemas

Starring: Rose, Jisoo, Jennie, Lisa

Directors: Min Geun, Oh Yoon-Dong

Rating: 3/5

How to apply for a drone permit
  • Individuals must register on UAE Drone app or website using their UAE Pass
  • Add all their personal details, including name, nationality, passport number, Emiratis ID, email and phone number
  • Upload the training certificate from a centre accredited by the GCAA
  • Submit their request
What are the regulations?
  • Fly it within visual line of sight
  • Never over populated areas
  • Ensure maximum flying height of 400 feet (122 metres) above ground level is not crossed
  • Users must avoid flying over restricted areas listed on the UAE Drone app
  • Only fly the drone during the day, and never at night
  • Should have a live feed of the drone flight
  • Drones must weigh 5 kg or less
In numbers: PKK’s money network in Europe

Germany: PKK collectors typically bring in $18 million in cash a year – amount has trebled since 2010

Revolutionary tax: Investigators say about $2 million a year raised from ‘tax collection’ around Marseille

Extortion: Gunman convicted in 2023 of demanding $10,000 from Kurdish businessman in Stockholm

Drug trade: PKK income claimed by Turkish anti-drugs force in 2024 to be as high as $500 million a year

Denmark: PKK one of two terrorist groups along with Iranian separatists ASMLA to raise “two-digit million amounts”

Contributions: Hundreds of euros expected from typical Kurdish families and thousands from business owners

TV channel: Kurdish Roj TV accounts frozen and went bankrupt after Denmark fined it more than $1 million over PKK links in 2013 

NO OTHER LAND

Director: Basel Adra, Yuval Abraham, Rachel Szor, Hamdan Ballal

Stars: Basel Adra, Yuval Abraham

Rating: 3.5/5

The specs
 
Engine: 3.0-litre six-cylinder turbo
Power: 398hp from 5,250rpm
Torque: 580Nm at 1,900-4,800rpm
Transmission: Eight-speed auto
Fuel economy, combined: 6.5L/100km
On sale: December
Price: From Dh330,000 (estimate)
The White Lotus: Season three

Creator: Mike White

Starring: Walton Goggins, Jason Isaacs, Natasha Rothwell

Rating: 4.5/5

The National's picks

4.35pm: Tilal Al Khalediah
5.10pm: Continous
5.45pm: Raging Torrent
6.20pm: West Acre
7pm: Flood Zone
7.40pm: Straight No Chaser
8.15pm: Romantic Warrior
8.50pm: Calandogan
9.30pm: Forever Young

The%20specs
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Mercer, the investment consulting arm of US services company Marsh & McLennan, expects its wealth division to at least double its assets under management (AUM) in the Middle East as wealth in the region continues to grow despite economic headwinds, a company official said.

Mercer Wealth, which globally has $160 billion in AUM, plans to boost its AUM in the region to $2-$3bn in the next 2-3 years from the present $1bn, said Yasir AbuShaban, a Dubai-based principal with Mercer Wealth.

Within the next two to three years, we are looking at reaching $2 to $3 billion as a conservative estimate and we do see an opportunity to do so,” said Mr AbuShaban.

Mercer does not directly make investments, but allocates clients’ money they have discretion to, to professional asset managers. They also provide advice to clients.

“We have buying power. We can negotiate on their (client’s) behalf with asset managers to provide them lower fees than they otherwise would have to get on their own,” he added.

Mercer Wealth’s clients include sovereign wealth funds, family offices, and insurance companies among others.

From its office in Dubai, Mercer also looks after Africa, India and Turkey, where they also see opportunity for growth.

Wealth creation in Middle East and Africa (MEA) grew 8.5 per cent to $8.1 trillion last year from $7.5tn in 2015, higher than last year’s global average of 6 per cent and the second-highest growth in a region after Asia-Pacific which grew 9.9 per cent, according to consultancy Boston Consulting Group (BCG). In the region, where wealth grew just 1.9 per cent in 2015 compared with 2014, a pickup in oil prices has helped in wealth generation.

BCG is forecasting MEA wealth will rise to $12tn by 2021, growing at an annual average of 8 per cent.

Drivers of wealth generation in the region will be split evenly between new wealth creation and growth of performance of existing assets, according to BCG.

Another general trend in the region is clients’ looking for a comprehensive approach to investing, according to Mr AbuShaban.

“Institutional investors or some of the families are seeing a slowdown in the available capital they have to invest and in that sense they are looking at optimizing the way they manage their portfolios and making sure they are not investing haphazardly and different parts of their investment are working together,” said Mr AbuShaban.

Some clients also have a higher appetite for risk, given the low interest-rate environment that does not provide enough yield for some institutional investors. These clients are keen to invest in illiquid assets, such as private equity and infrastructure.

“What we have seen is a desire for higher returns in what has been a low-return environment specifically in various fixed income or bonds,” he said.

“In this environment, we have seen a de facto increase in the risk that clients are taking in things like illiquid investments, private equity investments, infrastructure and private debt, those kind of investments were higher illiquidity results in incrementally higher returns.”

The Abu Dhabi Investment Authority, one of the largest sovereign wealth funds, said in its 2016 report that has gradually increased its exposure in direct private equity and private credit transactions, mainly in Asian markets and especially in China and India. The authority’s private equity department focused on structured equities owing to “their defensive characteristics.”

2025 Fifa Club World Cup groups

Group A: Palmeiras, Porto, Al Ahly, Inter Miami.

Group B: Paris Saint-Germain, Atletico Madrid, Botafogo, Seattle.

Group C: Bayern Munich, Auckland City, Boca Juniors, Benfica.

Group D: Flamengo, ES Tunis, Chelsea, (Leon banned).

Group E: River Plate, Urawa, Monterrey, Inter Milan.

Group F: Fluminense, Borussia Dortmund, Ulsan, Mamelodi Sundowns.

Group G: Manchester City, Wydad, Al Ain, Juventus.

Group H: Real Madrid, Al Hilal, Pachuca, Salzburg.

Real estate tokenisation project

Dubai launched the pilot phase of its real estate tokenisation project last month.

The initiative focuses on converting real estate assets into digital tokens recorded on blockchain technology and helps in streamlining the process of buying, selling and investing, the Dubai Land Department said.

Dubai’s real estate tokenisation market is projected to reach Dh60 billion ($16.33 billion) by 2033, representing 7 per cent of the emirate’s total property transactions, according to the DLD.

All or Nothing

Amazon Prime

Four stars

UAE currency: the story behind the money in your pockets
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HOW TO WATCH

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TikTok: @thenationalnews   

A MINECRAFT MOVIE

Director: Jared Hess

Starring: Jack Black, Jennifer Coolidge, Jason Momoa

Rating: 3/5

Results

5.30pm Maiden (TB) Dh82,500 (Turf) 1,400m

Winner Spirit Of Light, Clement Lecoeuvre (jockey), Erwan Charpy (trainer)

6.05pm Maiden (TB) Dh82,500 (Dirt) 1,900m

Winner Bright Start, Pat Cosgrave, Saeed bin Suroor

6.40pm Handicap (TB) Dh92,500 (D) 2,000m

Winner Twelfthofneverland, Nathan Crosse, Satish Seemar

7.15pm Handicap (TB) Dh85,000 (T) 1,600m

Winner Imperial Empire, Tadhg O’Shea, Satish Seemar

7.50pm Handicap (TB) Dh92,500 (T) 2,000m

Winner Record Man, Tadhg O’Shea, Satish Seemar

8.25pm Handicap (TB) Dh92,500 (D) 1,600m

Winner Celtic Prince, Fabrice Veron, Rashed Bouresly

COMPANY PROFILE

Company: Bidzi

● Started: 2024

● Founders: Akshay Dosaj and Asif Rashid

● Based: Dubai, UAE

● Industry: M&A

● Funding size: Bootstrapped

● No of employees: Nine