A 7.62 wind calculator to determine wind strength and wind allowance. Yellow plastic square with circular dial overlaidwind calculator

This piece of equipment was used to predict the flight path of an aircraft in order for anti-aircraft artillery to fire accurately at an approaching enemy airborne target. A crew of six operated the machine with information ready to be relayed to a gun within 50 seconds. The predictor was manufactured at the Commonwealth Government Ordnance Factory, Maribyrnong.The item is made primarily from metal, is square shaped and bolted to a wooden base. Numerous hand operated wheel dials attached to gauges which input information related to wind speed, bearings and elevation are visible. Each of the four sides has a specific task with three sides being labelled - Elevation Unit, Wind Calculator, Bearing Unit. The item is housed in a glass and wood display case. Attached to the front of the display case: 'VICKERS A.A. PREDICTOR No1 MK III MANUFACTURED BY ORDNANCE FACTORY MARIBYRNONG'pedictor, military equipment, ordnance, anti-aircraft guns

This calculator is like a modern calculator style keypad with a traditional pinwheel calculator. In operation it is similar to other Facit machines. The design from the 1930s was produced without interruption with only slight modifications until the early 1970s.This one hasn't a serial number or Model Number so date is unknown but probably the 1940s - 1950s when the SEC were constructing the Kiewa Hydro Electric Scheme.Used by the SEC Office Staff when the SECV were constructing the Kiewa Hydro Electric SchemeBox shape with grey steel top and sides on a black base. Three thin strips of stainless steel embossed with numbers on the top and clear panels beside them. Front has 3 red and 10 black knobs with arrows on the red and numbers on the black. Sides have stainless steel pedals and winders. The machine is very heavy. See on-line "mechanical calculators.wordpress.com"'Facit' on the front.calculator, facit

An adding machine is like a calculator enabling the user to do addition and subtraction and multiplication and division by repetition. Adding machines provided a printed receipt for each entry and calculators display information on a screen.Adding machines were used in the office and were replaced by calculators and comptometers.Used by a resident of the Kiewa Valley and possibly in the SECV office.Formerly UKV 242 or Contex UKV 253 - Electric (no cord). Beige and grey plastic covered adding machine with blue numbers and black function keys. Paper roll winder and dispenser at the top of the machine. Charcoal coloured plastic base with label and patent information. A blue handle for carrying. 2 small grooved wheels on the base.Left hand front: Addmaster label and logo Base: Label on base - "Addmaster Corp. Made in USA serial number 175614". Patent information labeladding machine, addmaster, mathematics

Course and Speed Calculator MKII - Air speed in MPH and Knots. Wind Speed and direction. In original wooden box. Used on aircraft.RAF Ref. No. 6B/125 - RCAF Ref. No. 6B/52 No. ST2473/40 Anson/Oxford Serial No. 3441S/40 Box Ref. No. GB/120a8