Chapter 291 Artillery Range Measurement 2
The surveying and mapping team composed of students from Weiss College followed the 1st and 3rd Battalions south, and arrived at Fort Bylan to set up camp on June 10th.
In order to create pressure on the Kent family as soon as possible, the artillery of the Alda army quickly began shelling.
Two battalions of directly-affiliated artillery and an independent artillery company lined up more than 20 artillery pieces and poured firepower directly towards Fort Bayland.
The person in charge of commanding the garrison of Byran Castle was the knight captain of the Kent family, Sir Valentine. He received the news that the Arda army stationed in the north was moving south very early, and immediately sent a fast horse to send a message to Senter. , he must defend Byland Castle until his duke can respond.
After the first Battle of Biedoburg, instead of disbanding, the Arda army occupied the northern part of Emden in one fell swoop, surprising the upper echelons of the Duke of Kent's faction.
Fortunately, the high fortress and deep ditch of Byland Fort blocked their attempt to occupy the entire Emden, which made the Duke breathe a sigh of relief. If the Kent family lost their hometown, it would be the last loss of face. No more - half of it has been occupied, it's embarrassing, okay?
Although there was a riot in Alda later, the Alda army stationed in Emden did not withdraw. The senior officials of Center City re-evaluated the strength of Alda-except for Love in Emden In addition to the more than 1,000 people who have boarded, Grayman still has a large reserve force in the territory.
After entering May, when the "anti-usurper coalition" regrouped, the Graiman family was missing. Based on this, the lords in Center City judged: Graiman's hands were The remaining troops did not dare to move out easily due to the impact of the previous riots, and he did not want to spit out the northern part of Emden, so the more than a thousand people stationed in Emden did not move.
Logically speaking, the spies of the Kent family only succeeded in provoking a riot, which was quickly put down. How could they hold back the entire remaining force in Alda?
In fact, spies do not need to take huge risks to organize real riots one after another. They only need to take advantage of the impact of the first riot.
In the streets, alleys, taverns and tea shops, some clips that are "processed" based on facts are inadvertently released, and they will become more and more viral.
Once bitten by a snake, Huxin Town, which has been afraid of well ropes for ten years and has "nip the danger in the bud" as its guiding principle, will immediately go to investigate and organize troops to enforce martial law. Before the investigation is clear, , how do you know whether it is true or false?
After carefully observing for more than half a month, it was confirmed that there was no movement from Alda's army, so the Duke's Palace formulated a plan: after the mercenaries from the south arrived, they would seize the opportunity before Graiman could take action. Defeat Earl Parker and other lords, and then use your troops to deal with Grayman.
But what shocked the Duke's Palace was that Graiman had more cards than expected. After only being trapped for a month, he was able to take out his hand and stab them in the back - in the Vis River Landing at Yuwei Town upstream.
Of course, Sir Valentine has no time to care about the affairs of Fishtail Town. His current responsibility is to guard Byran Castle.
This is the place where the Duke's family has lived for generations. If it falls into the hands of the enemy, even if the Duke does not blame it, he will not be able to face others and can only apologize with death.
Sir Van Lundin participated in or the First Battle of Fort Biddo, where he was impressed by the Arda army.
When he was assigned to guard Byran Castle, he tried to organize troops to conquer the northern part of Emden, but was quickly defeated by the power of thunder hammers and fire crossbows.
Sir Valentine always believed that he was defeated by the powerful power of thunder hammers and fire crossbows - although the fire crossbows of Arda's army only fired one round before they rushed over with bayonets to fight.
After that, the Knight Commander made up his mind that as long as the Arda army did not take the initiative to stir up trouble, he would stay in Byron Castle and not take any action. With the less than 2,000 troops he currently has on hand, he could only do this. Seek merit, but seek no fault.
However, the Knight Commander is still very confident in guarding Fort Byron. As the castle where successive heads of the Kent family have lived, its defense capabilities are among the best in the entire Northwest Gulf.
After successive expansions by the family owners, the outer wall of the castle is 12 meters high and 10 meters wide at the top. Unlike other city walls that are just covered with a layer of bricks on the outside and compacted with soil on the inside, the castle walls are 12 meters high and 10 meters wide at the top. Ramburg's walls were built entirely of boulders.
The castle is surrounded by a wide moat, and there are several deep ditches dug outside the moat.
The Arda army once tried to attack Bailan Fort, but the moats and ravines prevented the mortars from being deployed close, so they had to use 6-pounders and 12-pounders to bombard it, with little effect.
Now they're here again. ...
Nick and his classmates built a ranging instrument and are experimenting with the artillerymen on the artillery position.
A beam that is supported on the ground and whose height can be adjusted. Each end of the beam extends a thin "arm" towards the horizontal front. Viewed from directly above, the "arm" at one end is fixed It is perpendicular to the beam, and the other end can rotate left and right with the end point of the beam as the center of the circle.
"Two points and one line, two points and one line..."
The artilleryman first used the fixed arm on the left side of the beam to aim at the city gate of Bailan Fort in the distance. The front and rear ends of the fixed arm overlapped with the city gate, which was considered aiming.
"Two points and one line..."
While chanting, the artilleryman moved to the right side of the beam, gently moved the rotatable movable arm, trying to make its front and rear ends Coincident with the city gate.
The length of the beam is one meter, which is the so-called [baseline]. Theoretically, as long as the angle between the movable arm and the beam is measured, the straight-line distance between the fixed arm and the target can be measured. .
But there is a slight deviation between reality and theory.
Nearby targets are relatively easy to measure, but as the target gets farther and farther away, moving one meter to the left or one meter to the right in the baseline direction, the angle cannot be seen with the naked eye.
"With all due respect, sir, this thing of yours..."
The artilleryman participating in the test smiled bitterly but hesitated to speak.
Nick scratched the back of his head and smiled awkwardly. He calculated carefully and found that the tangent value of the entire 89-degree angle is about 57.28996. When the baseline is one meter, it can measure about 57 meters. The angle corresponding to the tangent value of 1000 is 89 degrees, 56 minutes and 34 seconds, from 57 meters to At 1,000 meters, this change in angle is too... too subtle. It is impossible to observe it with the naked eye and the current crude rotating arm.
It really corresponds to what Count Grayman said when he was teaching - a slightest mistake is a thousand miles away.
Joyce stood behind him and patted Nick on the shoulder: "Don't be discouraged. This distance measurement method is theoretically feasible. I believe it can be improved through certain technologies."
He crammed in some knowledge about trigonometric functions during the march and was convinced of Nick's distance measurement method.
Nick turned around and said: "Thank you, Mr. Joyce, I think at this stage we can increase the accuracy by lengthening the baseline length. 1 meter is too short. If it is increased to 15 meters, I I think its accuracy should be sufficient for the current effective range of the artillery."
Joyce shook his head: "15 meters, are you sure? It's too inconvenient to make a beam that long. Right? "
"You can split this rangefinder into two parts, and use the two-point-one-line method to make sure they are on the same straight line. "
"Oh? Let's try it!"
(End of this chapter)