21-10-2006, 08:18
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#37
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Grand Wizard Of The Inner Clique
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Re: What was accrington like during the war?
Quote:
Originally Posted by Retlaw
The doodlebug did have a guidance system, it had a small radio receiver built in which controlled the rudder. The Germans transmitted three different signals, the central one which was the supposed flight path, the other two signals were to correct the rudder if it veered off course left or right. The right hand signal (coming from the continent) was jammed by the British, causing most of them to crash in the North Sea.
Walter.
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Yes it did have a guidance system but nothing like what you describe, please try to search for real facts to back up your statements.
The truth is out there and often it's easier to find than you seem to think.
Below is how it worked taken from wikipedia
Quote:
Guidance system
The guidance system was crude in construction but sophisticated in conception (and had a few flaws in execution). Once clear of the launching pad, an autopilot was engaged. It regulated height and speed together, using a weighted pendulum system to get fore and aft feedback linking these and the device's attitude to control its pitch (damped by a gyromagnetic compass, which it also stabilized). There was a more sophisticated interaction between yaw, roll and other sensors: a gyromagnetic compass (set by swinging in a hangar before launch) gave feedback to control each of pitch and roll, but it was angled away from the horizontal so that controlling these degrees of freedom interacted (the gyroscope stayed trued up by feedback from the magnetic field, and from the fore and aft pendulum mentioned before). This interaction meant that rudder control was sufficient without any separate banking mechanism.
There was a small propeller on the nose, connected to a long screw thread going back inside the missile. On this thread was a washer, and at the back end of the thread were two electrical contacts. As the missile flew, the airflow turned the propeller and hence the threaded shaft; the washer would be wound along the shaft as it turned. When it reached the electrical contacts it would make a circuit, which energised a solenoid attached to a small guillotine. This guillotine would cut through the elevator control cable which would in turn put the sprung-elevator into the fully-down position, putting the V-1 into a sudden dive. This was intended to be a power dive, but the abrupt negative-G (or perhaps simply the angle of the descent) caused the fuel flow to cease which stopped the engine. As there was a belly fuse as well as a nose fuse, there was still usually an explosion, although not always with the device buried deep enough to increase the effect of the blast. Sometimes the sudden dive system would fail and the missile would coast in on a flat trajectory; this led to a rumour that there were two versions, which was not so.
At the launch site the engineers would preset the starting position of the washer on the shaft according to the known distance to the target and an estimate of the headwind - rough-and-ready, but accurate. Once the distance and trajectory toward the target was determined, the V-1 was launched and left to its own devices until it reached its destination or was shot down. Many historians attribute the V-1 as the world's first operational cruise missile.
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