JB-1 (JB-10)
JB-1 (JB-10)

JB-1 (JB-10)

JB-1 Bat refers to the first missiles created in the framework of the program "JB". The design started in July 44 of the year and assigned the official index to the new product - MX-543. Northrop offered to design a certain projectile with a turbojet engine installed with the ability to deliver two 900-kilogram bombs to a serious distance.

But at that time there was a problem because of the lack of information on the management of aircraft "flying wing". As a result, engineers from "Northrop" designed and built a manned glider pilot, the main purpose of which is to working out the dynamics of the elements. In the course of the research it was found that the sample with respect to manned accurately simulate the dynamics of the future JB-1. In August this year, the glider has completed numerous test flights, and especially his appearance led to getting the nickname "Bat» (Bat).

When all the nuances of the dynamics were worked out on a glider, the company's designers began work on the creation of a full-fledged cruise missile. The JB-1 Bat BA had a wide wing with a span of 9. The device began flying thanks to the General Electric B1 turbojet engine. On board they were installed in the amount of 2 units, which were fed by air located in the forward part of the central air intake.

Launch rocket was planned using a rocket sled that can be dispersed on 150-meter ramp. According to initial calculations, the missile has the speed of flight in 727 km / h with a range in 1080 km. Its main task is to deliver to the place of discharge of the two pound bombs 900-which were installed in streamlined blisters on both sides of the inlet.

By the end of the year, the rocket was put to the test. Its first flight was carried out on December 28 and ended unsuccessfully as the rocket fell off the guide, began to descend and crashed three hundred meters from the launcher. An examination of the accident was carried out. She showed that the reason for the failure was the mistake made during the installation of the ailerons. Also adversely affected by inappropriate engine performance. All this influenced the further fate of the drone. In February, the 45 of the development of the JB-1 Bat was covered, and all the resources and time were spent on the more progressive JB-10 UAVs.

But the closure of the project did not affect the interest of the US Air Force to the idea of ​​designing a cruise missile, which was not only to be compared, but also to overtake the German-made V-1 missile. After the unsuccessful start of JB-1 Bat, the developers began to pay more attention to the propulsion systems of different production. The fact that the failure of the JB-1 was entirely due to the insufficient performance of the turbojet engines was indisputable.

In late February 45-year company Northrop proposed to operate a new cruise missile for air-breathing engine pulsating "Ford» PJ31-F-1. Cheap, simple and relatively powerful engine could solve most of the technical challenges posed by the new rocket. Thus, the company was planning to re-create the project.

She decided to index as the JB-10. She had a relatively big difference with the original version, especially because of the longitudinally extending axis of the engine. He was inside the fuselage, which meant an additional installation of the annular air intake - increase cooling. The idea of ​​hanging bombs under the wing was rejected. Instead she decided to take themselves wings, and are integrated in 800-killogramovye with explosive charges.

For the first time a new rocket was lifted into the air in the spring of the same year. Her guidance system was very primitive. Released rocket flew at a direct rate. The operator had to pre-calculate the time for a dive of a rocket at the target. The Fow-1 had the same system, which limited JB-10 to use only for large area targets. But unlike the German design, the American had an increased flight speed, about 685 km per hour, which in turn made it difficult to intercept.

The US Air Force expected to use unmanned aerial installations to invade Japan, but the JB-10 trials drastically delayed because more upgrades and development were needed (only 10 was successful from 2 launches). The project was closed, and being unfulfilled due to the end of the Second World War.

JB-1 (JB-10). Characteristics:

Modification JB-1A JB-10
The diameter of the rotor, m 8.63 7.95
Length m 3.21 3.60
Height, m 1.38 1.47
Wing area, m2 14.40 15.14
Weight, kg 3213 3271
engine's type 1 TRD General Electric B1 1 ramjet Ford PJ31-F-1
Thrust, kgf X 1 180 1 x 410
Maximum speed km / h 645 690
Flight distance, km 1078 322
Practical ceiling, m

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