| 摘要 |
A flight path calculator in the nature of a circular slide rule having first and second relatively movable scale bearing members. The first of such members is logarithmically scaled with numerical indicia interpretable either as having the dimension of vertical distance (feet) or the dimension of vertical speed (feet per minute) for respectively reading the same relative to a first logarithmic scale on the second member that carries numerical indicia of slope distance (nautical miles) and to a second logarithmic scale on the second member that carries numerical indicia of slope speed (knots). Means is provided for indicating the relative positions of the scale bearing members in terms of the slope angle appropriate to the relative settings of the vertical distance - slope distance scales or the vertical speed - slope speed scales. Index markers and a cursor are provided to facilitate reading the indicia of the various scales.
|
