
Last modified: 2011-07-02 by rob raeside
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British military aviation started on 10 September 1907 when the British Army Dirigible (steerable airship) No.1 'Nulli Secundus' makes its first flight at Farnborough. Other significant dates include:
The following text comes from the
RAF website, with 
comments in square brackets.
The origins of the Royal Air Force roundel come from the First World War. The 
need to be able to identify aircraft soon became apparent and orders were issued 
at the end of August 1914 for the Union Flag to be painted on the under-surface 
of the lower wings. [Cochrane & Elliott (1998) 
show only a flag only on the rudder on 14 August at
this page and also 
on the fuselage and wing since 26 October at
this page.] This 
was satisfactory at low level but was confusing when the aircraft was higher as 
only the cross was visible. This was often mistaken for a German cross so the 
French system of concentric circles was adopted in October 1914. The main 
differences between the French and British systems was that the colours were 
reversed to read blue, white and red and the Union Flag was retained in 
miniature between the circles and the wing tips. This miniaturised Union Flag 
was also painted on the rudder.....The Union Flag on the rudder was replaced by 
red, white and blue stripes in May 1915 and in June of the same year, the 
Roundel, or 'Target' as it was now known, was painted on the top surface of the 
upper wings. The Union Flag on the aircraft was abolished altogether. [Cochrane 
& Elliott (1998) show an image at
this page as 
1915-1937. This is what later became known as RAF type A roundel - see
this image.]
Aircraft of the Naval Wing of the Royal Flying Corps were marked with one red 
ring and the Union Flag. [Cochrane & Elliott (1998) 
show it in this page 
as Dec. 1914 - May 1915].
Since the Second World War the red disk of British aircraft markings has had a 
larger diameter, measuring half again the width of either of the outer rings. 
The reason for this change is obscure, but it may be fair to presume a mere 
technicality of draughtsmanship when the white was removed before the war, as a 
concession to camouflage and then reintroduced after the war. There were 
variations of the Royal Air Force roundel during the War. A fourth colour, 
yellow, was added to the outside of the blue circle to make the roundel more 
visible against the newly introduced camouflage schemes. Fighter aircraft in the 
early years had a yellow circle of about the same thickness of the red and white 
circles, whereas larger aircraft such as bombers had a much thinner yellow 
circle around the roundel. [Cochrane & Elliott (1998) 
report all these variations at
this page as 
1937-1942 and this 
page as 1942-1947. A regular roundel with a yellow border is known as type 
A1 in this 
image. The no-white roundel and fin flash is known as RAF type B in
this image, 
and the thin white roundel is known as Type C in
this image 
(with yellow ring it is  called Type C1 - see
this image). 
Planes could carry markings from various types at the same time. Each type has 
its own fin flash].
Aircraft involved operations in the Far East carried a completely different 
version altogether. Here, the roundel was of two colours only - a mid-blue/grey 
outer ring with a white centre. These were carried to avoid confusion with 
Japanese aircraft which carried a red circle in the centre of a thin white outer 
ring. [Cochrane & Elliott (1998) 
show two phases. The first is reported on
this page with 
an appropriate fin flash later to be changed by replacing the inner disc to 
white and adding bars - see
this page.]
Today, the roundel appears in three formats on RAF aircraft. Attack aircraft 
such as Tornados and Jaguars, Chinooks, Pumas and Merlins of the Support 
Helicopter Force and Hercules transports carry a two-colour roundel of dark blue 
outer circle with a red centre. Fighter aircraft (Tornado F3s and Eurofighters) 
and Nimrod maritime patrol aircraft carry a 'washed out' roundel of pale blue 
and red whilst the traditional blue, white and red roundel can still be found on 
VIP aircraft (BAe 125s and BAe146s of No 32 Squadron), Tristars and training 
aircraft. [Cochrane & Elliott (1998) 
show type A as 
1947-1972, which is a mistake since
this type is used also today. They also show
type B as 1972-onward 
and type B (low-viz) 
as 1985-onward. See photos of Type A at
this 
image, Type B at
this image 
and low-viz at
this 
image].
Dov Gutterman, 27 June 2004