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No. 73 Squadron, Royal Air Force was formed on 2 July 1917 during World War I.


World War One

It was initially a unit of the Royal Flying Corps and was formed out of the Central Flying School, based at Upavon, Wiltshire. Eight days after, the new unit moved to Lilbourne, near Rugby.

The squadron, only for a matter of days led by Lieutenant C A Mercer, came under the command of Major H F A Gordon and started a phase of training at Lilbourne. From September 1917, this became more specifically targeted towards operating in combat when a Programme of Development was received, instructing the unit to prepare for an overseas deployment on 22 December.

This training phase saw a number of accidents and incidents, not uncommon in military aviation at that time. On one day, 29 October 1917, the squadron had four aircraft damaged in accidents: two in a mid-air collision, when one aircraft had its propellor damaged, the other lost part of its lower left wing and aileron; one aircraft was damaged when it had to be crash-landed after its pilot became lost; a fourth aircraft was damaged when the pilot crashed at the aerodrome. All incidents are shown in the squadron records as applying to 'A' Flight.

The Squadron's first fatality occurred when 2nd Lieutenant Rawbone crashed at the aerodrome on 7 December 1917 and died from his injuries on 18 December.


Combat operations

By stages, the unit deployed to France through January 1918; by the 20th, the full squadron complement was based at Liettres and available for operations. Due to bad weather, the first patrols were not sent up until 30 January. Two flights each comprising six machines undertook practice patrols, one along the balloon lines from Boesinghe to Flerbaix and then Bethune to Arras.

The first offensive patrols over enemy lines took place on 18 February 1918. On the 20th, all 18 Camels, divided into three 'Flights' patrolled a line between Roeselare and Menin and the first combat report was completed by Captain Gus Orlebar, submitting that an Albatros D.V may have been damaged.

Aircraft used

As at 1 October 1917, the squadron had the following aircraft:

'A' Flight:

'B' Flight:

'C' Flight:

  • 1 Avro

From November 1917, the squadron began to re-equip entirely with Sopwith Camels powered by 130hp Clerget engines. By the time it deployed to France in January 1918, the Squadron had 18 Camels, which it retained throughout the rest of the Great War.

World War II

The Squadron reformed on the 15th of March 1937 equipped with Hawker Furys, they then relocated to RAF Digby where they were re-equipped with Hawker Hurricanes.

73 Squadron along with No.1 Squadron were then posted to North-East France on the outbreak of war as part of the RAF Advanced Air Striking Force. Their assignment was shortlived as by the 17th of June 1940 the squadron had withdrawn from France.

The squadron suffered tragedy during the withdrawal when RMS Lancastria was sunk off the coast of St. Nazaire with the loss of around 40 groundcrew.


In 1955 73 was in Cyprus and deployed to Aden from 1956 - 57 for the Suez Crisis.


'The History of 73 Squadron', Part 1 - Don Minterne, Tutor Publications, 1994


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