Instrument [Navigational Computer & Slide Rule]

Tasman Empire Airways Limited, Attributed to

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Maker and Role
Tasman Empire Airways Limited, Attributed to
Comprised of 3 discs. The smallest is 127 mm in diameter and metal. The second is 176 mm in diameter and of similar metal. The third disc is identical in size to the second, but made of transparent plastic. These are joined together by a screw with TEAL logo on it (TEA in circle with wings on either side). There is also a rectangular piece of plastic the size of the radius of the object and 25 mm wide attached to the top. All pieces rotate. The top circle has "Serial No.2026" on it, a number scale around the outside "Speed-Time-Distance Calculations" and "For Airspeed Meter Corrections" written on it.
It also has a white label stuck on. Written on it in pen is "Navigational Computer and Slide Rule / used by: [...]". The second disc also has a number scale around the outside of the front. On its back (visible through the plastic disc) are a number of curved lines labelled in degrees.
Processed Material/Metal
Processed Material/Synthetic/Plastic
Signature/Marks and Type
Navigational Computer and Slide Rule / used by: Maurice McGreal Label
Ground / Speed / Index / FOR / SPEED - TIME - DISTANCE / CALCULATIONS Engraved
SERIAL NO. / 2026 Engraved
Accession No
Credit Line
Tasman Empire Airways Limited. Instrument [Navigational Computer & Slide Rule], 2004.415. The Museum of Transport and Technology (MOTAT).

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