Facts and figures as RAF celebrates 100 years

As the Royal Air Force celebrates its centenary, here are some of the key dates, facts and figures surrounding the first 100 years of the junior service.

- On April 1 1918 the Royal Air Force was born when the Royal Flying Corps and the Royal Naval Air Service merged - becoming the world's first independent air force.

RAF: 1918 v 2018 (PA Graphics)
(PA Graphics)

- The Ministry of Defence said that at the outbreak of the First World War in August 1914, the Royal Flying Corps had 146 officers and around 100 aircraft.

The Royal Naval Air Service had over 700 personnel, 93 aircraft, two balloons and six airships.

By the end of the war in November 1918, the Royal Air Force had grown in strength to 27,000 officers and 260,000 other personnel operating more than 22,000 aircraft.

No19 Fighter Squadron, based at Duxford, Cambridgeshire, flying their two blade propeller Supermarine Spitfire aircraft in formation in 1939 (PA)
No19 Fighter Squadron, based at Duxford, Cambridgeshire, flying their two blade propeller Supermarine Spitfire aircraft in formation in 1939 (PA)

- RAF Museum researcher Kris Hendrix said early RAF aircraft were "no different to civilian aircraft," and that later on there were "more and more military aircraft".

"A lot of those very first aircraft looked very different to how aircraft look now - not only because they were biplanes, but also the engine was at the back instead of the front," he said.

"They didn't have a proper fuselage as you have now - the connection between the main body and the tail was actually sometimes just a few wooden beams connected with cables - there was nothing in between."

- In 1919, a converted out-of-service RAF Vickers Vimy heavy bomber, a type of aircraft used during the First World War, was flown by former RAF pilots Captain John Alcock and Lieutenant Arthur Whitten-Brown from Newfoundland to Galway, Ireland, on the first non-stop transatlantic flight.

- A key moment in RAF history was the Battle of Britain in the Second World War, as it was the first major battle to be fought entirely by air and was a critical factor in preventing a Nazi invasion of Britain.

Lasting from July 10 to October 31 1940, the Luftwaffe had about 3,000 fighters and bombers pitted against the RAF's 1,200. The RAF victory led to Winston Churchill's famous remark that "never in the history of human conflict has so much been owed by so many to so few".

- The Mark 1 Spitfire, with eight machine guns in the wings, entered service with the RAF on August 19 1939, and at the outbreak of war only 182 were in service. It was the only Allied fighter to see continuous frontline service from 1939 to 1945.

Two Royal Air Force pilots from Fighter Command walking from an aircraft during the Second World War (PA)
Two Royal Air Force pilots from Fighter Command walking from an aircraft during the Second World War (PA)

- With radar used during the Second World War by both the RAF and Germans, Mr Hendrix said it was during this conflict that the British employed countermeasures such as electronic jamming.

He said Lancaster bombers would carry big bundles of aluminium foil and drop them out of the aircraft to overload the German radars - making them unable to find RAF bombers. Mr Hendrix said the technique is not so different to that which is used in modern aircraft, as they "still use electronic countermeasures derived from that".

- The biggest bomb dropped during the Second World War was known as the Earthquake Bomb or the Grand Slam and weighed 22,000lb. Mr Hendrix said these were dropped from RAF Lancasters in 1944 and 1945.

- The British-designed Harrier Jump Jet entered RAF service in 1969, making the RAF the first in the world to use its revolutionary vertical take-off and landing capabilities. The Harrier saw active service in the war to regain the Falkland Islands in 1982, proving its impressive manoeuvrability in combat.

Mr Hendrix said the idea behind the Harrier was that if World War Three did break out, there would be nuclear devastation, and aircraft would be required that could take off without a runway, and be placed or hidden anywhere.

Six Tornado aircrafts performing a flypast over RAF Marham, Norfolk (PA)
Six Tornado aircrafts performing a flypast over RAF Marham, Norfolk (PA)

- The supersonic Tornado, which is due to go out of service next year after nearly four decades of operations, was designed to fly at very low altitudes. It has been at the forefront of RAF operations since its introduction, including the campaign to eradicate Islamic State in Syria and Iraq.

- The UK currently has 14 F-35s, the world's most advanced fighter jet, being tested in the United States ahead of flight trials off the aircraft carrier HMS Queen Elizabeth later this year. Chief of the air staff Sir Stephen Hillier has revealed that the UK's first F-35 Lightning Squadron will arrive back at RAF Marham with the jets "very soon" and in time for the centenary flypast over central London on July 10.

- Figures show that as of April last year there were 828 RAF aircraft - a figure which includes tri-service training aircraft. As of January this year there were more than 36,963 service men and women in the RAF - both regular and reserves.

- The Latin motto of the RAF, Per ardua ad astra, translates to English as 'through adversity to the stars'.

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