1. The so - called precession is caused by the inequality of the moments of inertia of the earth.

2. Although the instruments compared represent a wide range of moments of inertia, no relationship between gustiness and anemometer performance is noted.

3. An aerodynamic shroud (40) encases the penetrating body (24) and emulates the aerodynamic shape of the existing bomb, and the weight, center of gravity, and moments of inertia of the bomb closely approximate those properties of the existing bomb.