This historic book may have numerous typos and missing text. Purchasers can
download a free scanned copy of the original book (without typos) from the
publisher. Not indexed. Not illustrated. 1918 Excerpt: ... and the airplane
contains much metal of magnetic attraction an error known as deviation is caused
which deflects the needle some degrees to the east or west. Adjusting the
Compass--To correct the deviation error is a task seldom assigned to the
aviator, but some idea of how it is accomplished will be found of value. (The
process which we term adjusting, is known in England as "swinging" the compass.)
The airplane is placed with