# Lernkarten

Karten 370 Karten 2 Lernende English Andere 28.04.2022 / 11.05.2022 Keine Angabe
0 Exakte Antworten 0 Text Antworten 370 Multiple Choice Antworten

What is the "static instability" of an object (airplane, helicopter, glider, hang-glider etc.)? A tendency (in a form of force or a moment) to continue moving in the direction of displacement following a disturbance. Lack of any object reaction following a disturbance. Static fluctuations around the object lateral axis. Trim balance condition.

What is the "neutral static stability" of an object (airplane, helicopter, glider, hang-glider etc.)? Lack of any object reacton following a disturbance. A tendency (in a form of force or a moment) to return to equilibrium state following a disturbance. Static fluctuations around the object lateral axis. Trim balance condition.

What kind of profile doesn't create induced drag at zero angle of attack? Double convex symmetrical. Plano-convex. Concave-convex. Double convex asymmetrical.

For a constant accelerated motion, double increase of time at a constant acceleration causes: A fourfold increase of the distance. A double increase of the distance. A double reduction of the distance. A fourfold reduction of the distance.

For a constant accelerated motion, double increase of acceleration within a constant time causes: A double increase in the distance. A fourfold increase in the distance. A double reduction in the distance. A fourfold reduction in the distance.

For a rectangular planform wing it is true that: The chord does not change along the wingspan. The chord decreases along the wingspan. The chord increases along the wingspan. The chord at first increases and then decreases along the wingspan.

For the three wings with the same surface and the same wingspan, but with different planform (rectangular, tapered and elliptical), the Aspect Ratio is: The same for all planforms. Highest for an elliptical planform and the smallest for a rectangular. Highest for the rectangular planform and the smallest for an elliptical. Highest for an elliptical planform and the smallest for the tapered.

For an established descent the following equation is true: Px=Q Pz=Q Q=Q Pz=Px