Uwins reported that control in the roll axis was poor.

The roll axis is usually defined as the longitudinal axis, which runs from the nose to the tail of the aircraft.

The gyro on the sight head only adjusted for rotation of the aircraft around its roll axis.

Dihedral effect is a critical factor in the stability of an aircraft about the roll axis (the spiral mode).

The purpose of dihedral effect is to contribute to stability in the roll axis.

Rotating the control wheel controls the ailerons and the roll axis.

This provided stabilization in the roll axis, which greatly eased the problem of sighting while maneuvering.

The roll axis is perpendicular to the other two axes with its origin at the center of gravity.

The spoilers were ineffective, only providing a minimal amount of control over the roll axis.

The roll axis (X) runs from tail to nose and was vertical at time of launch.