Sentences with phrase «height of the aeroplane»

Not exact matches

Dr Arturo López Ariste, another member of the team, adds: «The overall effect is similar to the trail of an aeroplane in our skies: the aeroplane travels horizontally at a fixed height, but we see that the trail starts above our heads and ends up on the horizon.

At this time the aeroplane was started and run along the ground for 300 or 400 feet, in traversing which distance it attained its usual speed of about 30 miles an hour, and quickly ascended into the air to a height of 12 or 15 feet.

Each velocity of the aeroplane and each height will, when substituted in the above equation, give a different triangle and, consequently, a different value for the angle, a. Substituting for every possible height and every possible speed will give a series of values for this angle which may be easily tabulated.

It must be observed, however, that all such tests have been made from heights of three hundred feet or less, at which range an aeroplane would not have a ghost of a show against machine guns, shrapnel, rapid - fire guns or even rifle fire.

When we consider aeroplanes flying at reasonably safe heights, say between one and two miles, the problem of accurately dropping projectiles becomes a difficult one and scientific calculation must take the place of guess - work.