The radius of action, or the distance traveled per tank of fuel, is greater with the reconnaissance than with the chaser, present machines having a capacity of from 10 to 12 hours on a single filling at normal flight speed.
In bombing operations (3), the loading is very heavy and consequently a "Bomber" must be a weight lifter to the exclusion of all other qualities. Not only is the bomb load requirement severe, but the fuel load is also of great importance, since bombing is usually carried out at considerable distances from the base. Such machines may carry from three to six men. All this calls for a tremendous area and a large power plant. The Handley-Page "Giant," and the Caproni Triplane are examples of Allied machines of this type while the German "Gotha," used in the London air raids, is an equivalent enemy machine. As an example of the weight carrying capacity of a typical bomber, the Handley-Page has carried a test crew of 21 men, or a personnel load of 3,570 pounds. The total weight, fully loaded, has been given as 11,500 pounds with a power plant of 540 horsepower. The maximum speed is 90 miles per hour with a climbing velocity of about 330 feet per minute. Duration is about 5% hours at normal speed and full load.
Fig. 3. Handley-Page "Giant" Bombing Type Biplane. Courtesy "The Aeroplane."
Fig. 4. Curtiss Twin Motor Biplane-Type JN.
Bombing is of great importance, not only because of the damage caused to munition factories, transportation lines, store houses, etc., but also because of the moral effect on both the enemy troops and the civil population. A well-timed bombing raid will do more to disorganize an army than almost any other form of attack, and this is attended with a much less loss of life, and with less cost and equipment. Points in enemy territory that could be reached in no other way are readily attacked by bombing planes with all the disastrous effects of heavy artillery fire. The aeroplane is better adapted for this service than dirigibles of the Zeppelin type, for they require fewer men for their operation, and in addition cost less to operate and build.
Fig. 4a. Curtiss "Wireless" Speed Scouts (S-2). By an Ingenious Arrangement of the Interplane Struts There Is No Exposed Wire or Cable.
Bombing operations against well protected objectives are best made at night since there is less chance of loss through anti-aircraft gun fire, and also because of the difficulty that the defense machines have in locating the raiders. Even when well equipped with searchlights and listening stations, it is not the easiest thing in the world to pick out and hold the location of an attacking squadron, for the searchlights immediately betray themselves and can then be put out of action by fire from the invaders. With the searchlights out of commission, it is almost impossible for the defending chasers to locate and engage the raiders, even before the bombs have been dropped. After the bomb dropping has been accomplished (and with comparative accuracy because of the flares dropped by the bombing party), the raiders are lightened of a considerable portion of their load, and are correspondingly increased in their ability to climb and to evade the enemy chasers.