-40%
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED
RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED

RARE -VINTAGE WW2 1939 RAF COURSE AND SPEED CALCULATOR MK. II W.G.PYE, CASED

$ 52.27

Availability: 100 in stock
  • Theme: Militaria
  • Country/Region of Manufacture: United Kingdom
  • Condition: Shows use and wear for its age, but is in very good overall condition.
  • All returns accepted: ReturnsNotAccepted

    Description

    TYPICALLY USED BY NAVIGATORS ON BOMBERS SUCH AS THE LANCASTER TO CALCULATE ROUTES.
    THE CALCULATOR IS IN GOOD UNRESTORED CONDITION AND APPEARS TO BE FUNCTIONAL.
    PLEASE SEE PHOTOS FOR CONDITION.
    IN ORIGINAL FELT-LINED WOODEN TRANSIT CASE.  WORKING TWIN CLASPS AND LEATHER CARRYING HANDLE.  ONE END OF CASE IS STENCILLED "Ref No. 6B/120 COURSE AND SPEED CALCULATOR MK. II.  W.G. PYE & CO LTD – SERIAL NO. 2507/39." 1939 DATE CODE.  Dimensions (6.1inches x 1.9 inches x 11 inches)
    Dimensions
    :
    W: 15.5cm (6.1")
    H: 4.8cm (1.9")
    L: 28cm (11"
    Once meteorological services began to supply wind speed and direction for pilots it was possible to work out ground speed and desired compass heading on the ‘triangle of forces’ principle. The Course and Speed Calculator allowed the navigator to set up the wind direction and speed, the intended aircraft course and airspeed, and then read off the computed heading and resulting groundspeed. This early model was heavy and mechanically complex, but had the refinement of a small moving indicator to show drift, and also had a circular slide rule on the back.