![]() |
Aviation of World War II |
![]() ![]() |
Soviet Union | Lend - Lease | Facts | Forum | Germany | Japan | R A F | U S A A F | Other | Photos |
|
"Martin 167"Light BomberMartin![]()
Construction. Structurally "Martin 167" was an all-metal cantilever monoplane with smooth duralumin sheathing of all surfaces, except for rudders and ailerons, sheathed with canvas. The fuselage is a semi-monocoque type of oval cross-section. The designers tried to "squeeze" the midship as much as possible in order to reduce aerodynamic drag. For this, they had to abandon the transitions between the cockpits, although this was a clear departure from the American tradition of bomber aircraft. The crew members could communicate with each other only via an intercom. Two-spar wing of the caisson type. The main landing gear struts are non-flat, with oil-pneumatic shock absorption, they were retracted by turning back into the engine nacelles. The tail wheel is fixed. In general, the aircraft turned out to be very elegant, aerodynamic and light, which provided it with relatively good flight performance. The crew consisted of a navigator-bombardier (aka commander), who was sitting in a well-glazed bow cockpit, a pilot and a gunner-radio operator. Sometimes the crew included one more person - the navigator. First of all, this concerned the French naval squadrons. Plane control has been duplicated. In the cockpit of the bombardier navigator there was a second steering wheel and pedals, which he could use for precise aiming at the target or in the event of a pilot's dead. Powerplant. The first modification of the aircraft was equipped with 14-cylinder two-row radial engines "Pratt-Whitney" R-183SC3G "Twin Wasp" with single-stage superchargers with a capacity of 1050 hp. The propellers are Hamilton-standard three-blade automatic gearboxes with “fan” linings at the hub to improve the cooling of engine cylinders. Armament. To act as a bomber, a small bomb bay was made in the fuselage, which could hold small and medium-caliber bombs (from 10 to 100 kg). The total bomb load, even by the then standards, was small. The designers planned to install additional outer underwing bomb racks in the future. In addition to bombs, "Martin" could attack the enemy with machine-gun fire, for which in the center section of the wing were installed four course machine guns "Browning" rifle caliber. According to the project, the crew for self-defense had three mobile Vickers machine guns. One of them was located in the bow installation (however, it was not installed either on the prototype or on production vehicles), one more - in the upper turret turret, and the third - in the rear lower "dagger" installation. In general, it can be said that both offensive and defensive armament of the aircraft was already clearly weak for that time. The situation was aggravated by the complete lack of passive protection. The developers did not want to make the vehicle heavier with armor and reduce the volume of fuel tanks by protecting them. It was assumed that the aircraft's main protective means would be its high speed. But in practice, this calculation was not justified, since most of the enemy fighters, with which the "Martins" soon had to deal, had an undeniable advantage over them in speed characteristics. |
|