French, British

A flight without landmarks and a twist without stalling were significant achievements of the week:

In France: From St. Inglevert, near Calais, to Istres, near Marseilles; from the northeastern tip of the country to the southern shore, Army officers flew under the worst conditions of visibility without sighting a landmark. They relied on maps, compasses, derivometers (drift-indicators). They strayed scarcely a mile from the course.

In England: When an airplane is forced to too great an angle to the wind, it loses speed and lateral control, stalls. A spin, an accident, is likely to result. Officials of the British Air Ministry watched a pilot mount in an Avro biplane fitted with Handley Page slots. He twisted into the worst wind-angle, came almost to a standstill. But here the ailerons (auxiliary wingtips) interconnected with the slots (which provided an auxiliary passage for the air at the front portion of the wing) maintained control until the pilot resumed a normal progress.