Particularly Ao When

<g) GOOD SUBGRADE AND FOUNDATION SUCH AS SAND. 9AND OR GRAVEL, OR ANY GRANULAR MATERIAL.

Figure 133.—Wheel-load distribution on runway.

Figure 133.—Wheel-load distribution on runway.

Ficum 134.—Airplane concealed with artificial materials—garniahed halt-top net, artificial trees in foreground.

128 82 not end there. It is just as important to keep that field in a condition to be used at all times. Since the field comes under fire of various sores, engineers must be alert and ready to fill bomb craters and to clean debris, shell fragments, and other foreign material from the runway surface. The maintenance of camouflage practice and discipline is also the engineers'

job.

b. Equipment.—Aviation engineers are given much heavy machinery—bulldozers, power snivels, road graders, tractors, trucks. This material must be kept In the best of condition. These powerful machines are the engineer's tools; without thum he cannot do hie- job. To fill a crabcr made by a 300-

Figure 135.—Airplane Concealed with tiid of nature] materials—

ncv garnished with lccal foliage.

Figure 135.—Airplane Concealed with tiid of nature] materials—

ncv garnished with lccal foliage.

pound bomb means that 90 tons of material must be moved. With his heavy equipment, the aviation engineer can do the job in a short time; without his equipment, the Job will be done too late to help the air force, too late to keep the field serviceable, too late to alluw our mission to be successful. Your equipment must be ready.

129 82

130 82

Ficxnus 137.—Laying pierced plank steel runway.

Figurk 338.—Laying Irving grid steel runway.

131 82

Ficuk£ 139.—Laying bar-and-rod type steel runway.

Pxcuke 140 —Method of clipping pierced plank.

133 83

■ 83. Keep 'em Flying.—Like other Army engineers, the aviation engineer must do his utmost to prevent anything from hindering the forward and continued movement of our forces. Sure. It's a tough job, but engineers are tough sol-

Figure 143.—Clearing and grading runway using bulldozers, typical pieces oi heavy aviation engineer equipment.

dlers. The construction and maintenance of an airfield is one of the stiffer challenges thrown to the engineer. We are meeting it successfully. Whether we continue to win the ' battle of the airfields" depends upon how well you leam your job and upon the courage with which you carry it out Keep 'err. Hying!

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