Tactical and Technical Trends, No. 11, p. 36 described this
particular metal spike and its special use on highways and landing fields.
The pilot of an Italian bomber who happened to land on a field where the Germans had apparently
dropped these spikes, describes his experience. He states that they came as a surprise and caused
considerable confusion. Both tires on his plane were punctured when taking off. He was not aware
of what happened until coming in for a landing and it was with difficulty that the plane was kept
from turning over.
Despite efforts to get them off the field, it was stated that some spikes always remained. When
dropped on loose and sandy surfaces, the spikes were sometimes completely buried and were not
discovered, and worked up into the aircraft tires when run over.