Three years since work began on the Airlander 10, engineers are putting the final touches on the giant aircraft described as ‘part plane, part helicopter.’
The 300ft-long (93 metres) Airlander was originally developed as part of a US Army project but was scrapped by military bosses. It is now being converted to provide business and leisure flights in a hangar in Cardington, Bedfordshire.
The vessel was filled with 1.3million cubic feet of helium – enough to fill 15 Olympic-sized swimming pools -in a test run last October and now the engines and fins are being fitted ahead of next month’s flight. The Airlander produces 60% of its lift aerostatically, by being lighter-than-air, and 40% aerodynamically, by being wing-shaped, as well as having the ability to rotate its engines to provide an additional 25 per cent of thrust up or down. This means the Airlander can hover as well as land on almost any surface, including ice, desert and water.
In its new position nearer the doors of the hangar, the £80 million ($1.1 billion) aircraft is now being fitted with its engine, fins and ‘mission module’ ahead of its first proper flight.
The craft did carry out a test flight in 2012, but next month’s take-off will be the first under the hybrid aircraft’s latest specifications. Airlander is the largest aircraft in the world, bigger even than the Airbus A380 – but would be dwarfed by the historic zeppelins developed in Germany during the 1930s. It produces 60 per cent of its lift aerostatically, by being lighter-than-air, and 40 per cent aerodynamically, by being wing-shaped, as well as having the ability to rotate its engines to provide an additional 25 per cent of thrust up or down. This means the Airlander can hover as well as land on almost any surface, including ice, desert and water.
It will be able to stay in the air for two weeks at a time, cruising at more than 90mph (144km/h), and travel at heights of up to 20,000ft (6,100 metres) with a 10-tonne cargo.
Some have hailed the Airlander as the future of air travel because, unlike conventional aeroplanes, it emits little pollution and is not noisy enough to disturb people on the ground. It can take off and land vertically like a helicopter, which means it does not need a long runway to operate.
British firm Hybrid Air Vehicles was originally one of the contractors developing the vessel for the US Army under a $500million programme scrapped in 2012. The company then bought the rights to develop the Airlander for commercial use – including use as a passenger aircraft that will carry 48 people at a time. The vessel will also offer business services such as coastguard duties, military and civil surveillance, filming and academic research.
Engineers are hoping eventually to launch a sleeper service which could travel overnight between major cities for business customers. Among the wealthy figures backing the project is Iron Maiden lead singer Bruce Dickinson, who has invested around £250,000 ($360,000) in the Airlander, as well as Carol Vorderman. In its military incarnation, the aircraft previously embarked on a test flight in New Jersey, but the lift-off on 31 October was the first time the civilian version had left the ground.
In a blog post, Hybrid Air Vehicles explained: ‘Already this month there have been a number of major attachments under the hull in preparation for the forthcoming First Flight of Airlander, beginning with the fuel module at the rear of the aircraft, followed by the payload beam, (which will support bulky external cargo) and finally, the cockpit and payload bay (which we term the Mission Module) were attached this week.’
The firm’s technical director Mike Durham added: ‘It’s very satisfying for the team and me to get another milestone under our belts. We’re hugely excited about the forthcoming Airlander First Flight this year.’
The mass of the aircraft is supported from strengthened features built into the hull during manufacture. Multiple attachment points on each part of the structure allow the load to be distributed evenly. Unlike traditional airships, the Airlander has no internal structure but it becomes rigid through being filled with helium, at just above atmospheric pressure. The super-strong hull material was designed by Warwick Mills and assembled by ILC Dover, the company that makes Nasa spacesuits. It uses a woven fabric for strength on the inside, and a Tedlar layer for protection on the outside, around a mylar film to retain the helium. Tedlar is used to lower how flammable the coatings on planes are, and is also used in raincoats and metal sheeting.
‘The very latest materials, which are both strong and light, are used throughout the manufacture of our cutting-edge Airlander 10, ranging from the bespoke hull fabric to the mainly carbon composite Mission Module, Fuel Module, Ducts and engine support battens,’ continued the firm.
‘We produce less noise, less pollution, have a lower carbon footprint than conventional aircraft, and have longer endurance and better cargo-carrying capacity than any other flying vehicle.’
The Airlander’s power comes from four 350hp, four-litre V8 diesel engines – two mounted at the front and two at the back. With a length of 302ft (93 metres), a width of 143ft (44 metres) and a height of 85ft (26 metres), it is officially the world’s largest aircraft – the biggest passenger plane, the Airbus A380, is only 240ft (73 metres) long.
However, the Hindenburg – the German zeppelin that crashed in New Jersey in 1937 with the loss of 35 lives – was three times longer than the Airlander.
The Airlander’s base at Cardington is the historic home of the Royal Airship Works, set up in 1919 to build R101 airships in a failed attempt to damage German dominance of the industry.
AIRLANDER 50 will be the big brother for the AIRLANDER 10 and will carry over 50 tonnes of cargo with a cargo bay volume in excess of 500 cubic metres. Much of the technology in the two aircraft is the same. The AIRLANDER 50 is designed specifically for the Cargo or Heavy Lift market and offers a lower haulage cost per tonne-km than other aircraft or bush or ice roads. It can also travel point to point without the need for any airport infrastructure so is ideal for remote access and logistics for sectors such as mining, oil & gas and humanitarian relief.
For more information visit: hybridairvehicles.com