Circulars were instituted in September 1940 as a means of communicating
information throughout the by now far-flung branches of the Department.
The Monthly Circulars were continued until December 1950 when they
were replaced by Administrative Instructions.
indexes list noteworthy entries only - minor administrative matters are
No.5 January 1941
danger of idle conversation - A.B.
Necessity for staff to be security conscious and the danger of spreading
Aircraft in the USA
Description of Clark F-46-A and Timm PT-160-K aircraft incorporation Plastic
in their construction. Ease of Plastic moulding compared to riveted metal
Circular No.6 February 1941
- A.B. Corbett DGCA
Progress In last 20 years of aviation in various fields. Exhortation to
staff to Enhance progress.
Angeles Municipal Airport - Description
construction in Canada for British Commonwealth Air Training Plan
Survey, construction and establishment of Aerodromes for various types
of training. 65 Schools established before the end of 1940. Co-operation
between the Dept of Defence and Dept of Transport.
Traffic - Services operated by Australian National Airways
Huge increases in Traffic and Freight in the last four months of 1940.
landing facilities in Australia , New Guinea and Papua
Table of Civil Aerodromes and Flying boat bases
Circular No.7 March 1941
- A.B. Corbett DGCA
Exhortation to staff to go beyond the strict requirements of ones
job and freely give extra service and help, thus being a more rounded
and successful officer.
from military service
Categories of staff classed as being reserved occupations.
Aeroplane makes a town
Influence of Aircraft in the development of the gold reserves of the Bulolo
Valley in New Guinea. Establishment of Wau airfield and the associated
town. Difficulties of flying in the challenging environment.
Circular No.8 April 1941
in Charge - Duties in relation to
Explanation of the chain of command and how difficulties relating to OICs
giving instructions to technical staff, in conflict with their technical
orders, are to be handled.
seeking Parliamentary and other outside influence
Officers prohibited from seeking influence to gain advantage. Further
examples will be severely punished.
tests to determine suitable Runway Materials
Rough on-site Methods of testing materials for suitability to construct
runways. Mostly involving tactile subjective tests.
Island - Past and Present
Short Description of King Is and the imminent establishment of an Aeradio
Circular No.9 May 1941
The War Effort - A.B. Corbett
Staff should support the war effort in their every action and attitude,
discouraging waste and indolence.
of Signal Logs
Reasons for keeping signal logs. Details to be recorded and need to be
alert to all aircraft in the operational area.
Circular No.10 June 1941
to be considered in Airport planning
Type of air service envisaged, siting of airport to permit later expansion
and the provision of supporting facilities and transport.
Growth of Passenger traffic on Australian airlines
calls Flying Doctor
Co-operation of Aeradio stations in outback saves lives.
Japanese Morse code set out for interested Aeradio operators.
Circular No.11 July 1941
influencing Airport size
Likely Aircraft size in the future, Performance, site elevation, topography,
meteorology and character of surface.
over the Ocean
Comparison of landplanes and flying boats for over water long-range operations.
Radio Marker Beacons
Australian system of marker beacons to accurately determine overhead and
intersection positions when using the Radio Range system for navigation
Circular No.12 August 1941
Communication Services National Security Regulations
Aeronautical Engineers give RAAF Amphibians new lease of life
Detailed description of the refurbishment of Seagull amphibians, using
Australian timbers on Advice from the CSIRO.
Circular No.13 September 1941
of Termites, Cockroaches, Silverfish
Lofting in the USA
New system of projecting Engineering drawings to full size on sensitised
metal, enabling immediate manufacture from the template so produced. Also
used to prepare blueprints.
development for maximum speeds
No. of blades, gearing and aspect ratio to extract maximum propulsive
efficiency with increasing engine power.
permitted on four engine American civil aircraft
Lockheed authorised to build the Constellation
Circular No. 14 October 1941
Work - A.B. Corbett DGCA
An explanation of causes of this phenomenon and methods of reducing the
effects of it.
A short description. Click here for a photo.
of direct injection engines and carburettor equipped engines
Comparison of the Merlin and Jumo 211d engines and performance at altitude.
A Comparison of the TV of various bodies and Aircraft. Dive brakes required
to control speed in a dive.
Improvement in construction and reliability of aircraft in the preceding
Inaugural meeting of the Aviat Social Institute.
Circular No.15 November 1941
on Air Services
Dept of Civil Aviation assumes responsibility for the ordering of priorities
for all Government travel by air.
Record number of International movements in the UK in one day. Statistics
Difficulties caused by the transfer of commercial transport aircraft to
the UK for war duties.
An explanation of the different categories of Air service contracts for
the carriage of Mail.
Plated Wooden Airscrews
New process improves life and damage resistance of airscrews.
Circular No.16 December 1941
Boat Base Staffs tests to qualify for advancement to Coxswain
Syllabus of tests to be passed
Nose wheel Landing gear
A description of the many advantages and few disadvantages of the tri-cycle
of Boundary Lighting Equipment
A detailed description of preventative maintenance procedures, to reduce
the high rate of failures.
The Standards Association of Australia issues standards to facilitate
the manufacture of aircraft in Australia in view of the mixture of US
and UK standards currently employed.
An explanation of the principles involved.
by Brian Surtees, CAHS
for the index of DCA Monthly Circulars for 1940,
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