Chapter 291 Artillery Range Finding 2

The surveying team composed of students from Weiss College followed the first and third battalions southward and arrived at Byran Castle on June 10th to set up camp.

In order to put pressure on the Kent family as soon as possible, the artillery of the Arda army quickly began to bombard.

The direct artillery of the two battalions and an independent artillery company lined up more than 20 artillery pieces and poured firepower directly at Byran Castle.

The person in charge of commanding the Byran Castle garrison was Sir Valentine, the knight of the Kent family. He received the news of the Arda army stationed in the north heading south very early, and immediately sent a fast horse to Sente to report the news. Before his duke responded, he had to defend Byran Castle to the death.

After the first battle of Bido Castle, the Arda army not only did not disband, but occupied the northern part of Emden in one go, which surprised the upper echelons of the Duke of Kent's faction.

Fortunately, the high-walled and deep-ditched Byran Castle blocked their attempt to occupy the entire Emden, which made the Duke feel relieved. If the Kent family lost their hometown, they would lose their last bit of face - half of it had been occupied, which was very embarrassing.

Later, although there was a riot in Arda, the Arda army stationed in Emden did not withdraw. The senior officials of Sent City re-evaluated Arda's strength - in addition to the more than 1,000 people in Emden, Graman still had a considerable reserve force in the territory.

After entering May, when the "Anti-Usurper Coalition" regrouped, the Graman family was missing. The lords in Sent City judged that Graman's remaining troops did not dare to move out easily because of the previous riots, and he did not want to give up the northern part of Emden, so the more than 1,000 people stationed in Emden did not move.

Logically speaking, the spies of the Kent family only succeeded in inciting a riot, which was quickly quelled. How could they hold back the entire remaining force of Arda?

In fact, the spies did not need to take huge risks to organize real riots one after another. They only needed to take advantage of the impact of the first riot.

In the streets and alleys, in taverns and teahouses, some "processed" clips based on facts were inadvertently released, and they would spread more and more fiercely.

Once bitten by a snake, you will be afraid of the rope for ten years. The Lake Heart Town, which takes "nipping the danger in the bud" as its guiding principle, will immediately rush to verify and organize troops to impose martial law. Before you find out clearly, how can you know whether it is true or false?

After careful observation for more than half a month, it was confirmed that there was no movement in Arda's army, so the Duke's Mansion made a plan: after the arrival of the mercenaries in the south, before Graman was free, first defeat Earl Parker and other lords, and then use troops to deal with Graman.

However, what shocked the Duke's Mansion was that Graman had more cards in his hand than expected. After being tripped for only a month, he was able to stab them in the back - landing in Fishtail Town upstream of the Weiss River.

Of course, Sir Valentine has no time to take care of Fishtail Town now. His current duty is to defend Byran Castle.

This is 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 him, he will not be able to see anyone and can only die to apologize.

Sir Valentine participated in the first Battle of Bido Castle, and the Arda army left a deep impression on him.

At the beginning of being commissioned to guard Byran Castle, he still tried to organize troops to conquer the northern part of Emden, but soon retreated under the power of the thunder hammer and fire crossbow.

Sir Valentine always believed that he was defeated by the powerful power of the thunder hammer and fire crossbow - although the Arda army's fire crossbow only fired one round and rushed over with bayonets for hand-to-hand combat.

After that, the Knight Commander made up his mind that as long as the Arda army did not take the initiative to provoke trouble, he would stay in Byron Castle and not do anything. With less than 2,000 soldiers on hand, he could only do so. He did not seek merit, but only hoped not to make mistakes.

However, the Knight Commander was still very confident in defending Byron Castle. As the castle where the successive heads of the Kent family lived, its defense capabilities were among the best in the entire Northwest Bay.

After the expansion of successive heads, the outer wall of the castle was 12 meters high and 10 meters wide at the top. And unlike other walls that were only wrapped in a layer of bricks and stones on the outside and rammed with mud inside, the walls of Byron Castle were completely built of huge stones.

There was a wide moat outside the castle, and several deep trenches were dug outside the moat.

The Arda army once tried to attack Byron Castle, but the moat and gullies made it impossible to deploy mortars close to it, so they had to use 6-pound and 12-pound guns to bombard it, but the effect was not great.

Now they are here again.

...

Nick and his classmates made a rangefinder and were experimenting with the artillerymen on the artillery position.

A beam that can be adjusted in height and supported on the ground, with thin "arms" extending horizontally forward from both ends of the beam. When viewed from above, one end of the "arm" is fixed and perpendicular to the beam, while the other end can rotate left and right with the end of the beam as the center of the circle.

"Two points and one line, two points and one line..."

The artillerymen first aimed at the gate of the Bailan Castle in the distance with the fixed arm on the left side of the beam. When the front and rear ends of the fixed arm overlapped with the gate, it was considered aimed.

"Two points and one line..."

While muttering, the artillerymen moved to the right side of the beam and gently moved the rotatable movable arm, trying to make its front and rear ends overlap with the gate.

The length of the beam is one meter, which is the so-called [baseline]. In theory, 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.

However, there is a slight deviation between reality and theory.

It is easy to measure the target nearby, but as the target gets farther and farther away, if it moves one meter to the left or one meter to the right in the direction of the baseline, the angle cannot be seen by the naked eye.

"Excuse me, sir, this thing of yours..."

No mistake, one post, one content, one 6, one 9, one book, one bar, take a look!

The artilleryman who participated in the test smiled bitterly and hesitated to speak.

Nick scratched the back of his head and smiled awkwardly. He calculated carefully that the tangent value of the full 89-degree angle is about 57.28996. With a baseline of one meter, it can only measure about 57 meters, and the angle corresponding to the tangent value of 1000 is 89 degrees, 56 minutes and 34 seconds. From 57 meters to 1000 meters, the change in angle is too...too subtle. It is impossible to observe with the naked eye and the current crude rotating arm.

It really fulfilled the words of Earl Graman when he taught - a small mistake can lead to a big mistake.

Joyce stood behind him and patted Nick on the shoulder: "Don't lose heart, this distance measurement method is theoretically feasible, and I believe it can be improved through certain technologies."

He made up for the knowledge related to trigonometric functions on the march and believed in 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. 1 meter is too short. If it is increased to 15 meters, I think its accuracy should be sufficient for the effective range of artillery at this stage."

Joyce shook his head: "15 meters, are you sure? It's too inconvenient to make such a long beam, right?"

"You can split this rangefinder into two parts, and use the two-point one-line method to ensure that they are on the same straight line."

"Oh? Let's try it!"