
Rank badge of a Royal Air Force Flight Sergeant
'Flight Sergeant' ('Flt Sgt', 'F/Sgt', 'F/S', 'FSgt' or 'FS') is a senior
non-commissioned rank in the
British Royal Air Force and several other
air forces which have adopted all or part of the RAF rank structure. It is equivalent to a
Staff Sergeant in the British Army and has a
NATO rank code of OR-7.
History
The rank was devised in the British
Royal Flying Corps (RFC) and passed to the
Royal Air Force (RAF), on its formation in 1918. RFC flight sergeants wore a four-bladed propeller between the chevrons and the crown.
On 1 July 1946,
aircrew flight sergeants were redesignated 'Aircrew I' and replaced their chevrons with three six-pointed stars within a wreath and surmounted by an eagle and a crown. This proved unpopular however, and in 1950 they reverted to their old rank and badge, although they have worn an eagle between chevrons and crown ever since.
Between 1950 and 1964, the rank of 'Chief Technician' was equivalent to flight sergeant and was held instead of it by technicians, but now chief technician is a junior rank (still only held by technicians), although classified by NATO in the same grade.
Usage

Rank badge of a Royal Air Force aircrew flight sergeant
In the RAF, Flight Sergeant ranks above
Chief Technician and below
Warrant Officer. The insignia for aircrew flight sergeants has an eagle in between the chevrons and the crown.
Apart from the RAF, the rank of Flight Sergeant is also used by many
Commonwealth air forces, including the
Royal Australian Air Force, the
Royal New Zealand Air Force, the
Ghana Air Force, the
Bangladesh Air Force, the
South African Air Force and the
Air Force of Zimbabwe. In
Canada, since the unification of the
Canadian Forces in 1968, this rank has been replaced by
Warrant Officer though the rank is still used by the
Royal Canadian Air Cadets. The rank is also used in the
Irish Air Corps.
In the RAF, the rank insignia is three downward pointing
chevrons below a crown and flight sergeants are usually addressed as "Flight" and are never addressed by the junior rank of "Sergeant".
Flight Sergeant is also used in many
cadet organizations around the world, such as the
Air Training Corps,
Combined Cadet Force (RAF Section) and
Royal Canadian Air Cadets.
See also
★
RAF enlisted ranks