Fan rushed away without help.

I asked Dai Lu if he knew where Fan Wusu was fighting, and Dai Lu said that the Xuanjia cavalry commanded by Fan should be near the Sanyin Hall at this moment.

"Three Yin Temple...... Isn't that the rebels' sphere of influence? And it's the core area," I wondered, "how did she get in?"

Don't tell me that the battle has taken a sharp turn in the past two days, the imperial army has pushed the rebel crystal away, the underworld is too big, even if the rebel army surrenders, the advance speed will not be so fast.

"The Xuanjia cavalry is an offensive and defensive team, but the defense is particularly prominent, it is the elite of the elite of the imperial court, and the purpose of entering the rebel territory is to directly smash the Yellow Dragon, disrupt the deployment of the rebels on the periphery, and attract the rebels to come back for reinforcements - encircling the point to send reinforcements, this tactic is too familiar to us." Dai Lu said with a smile, every modern person is familiar with it, and she must have learned it in her college courses.

"How many, how many?" I asked again.

"It's not much, it's only 3,000 people, and it's been more than half a month since they broke into the hinterland of the rebels, and I don't know what the damage is - I listened to my grandfather." Dai Lu pointed to the old man Dai Zi who was studying the hydraulic pipe next to him, the two of them were too different, I didn't know if it was Mrs. Grandpa or what, so I simply called Grandpa.

"It is indeed not advisable to carry artillery," I said, "and the cavalry is very fast-moving, and the artillery, whether drawn or cared, can not keep up with the speed of the cavalry, unless it is ......." Five

"Unless I design a self-propelled gun, haha." Dai Lu covered his mouth and smiled.

I waved my hand, "Don't think too much, just form a weapon generation gap, it's too obvious, people should say we're cheating."

"Know, know, I'll disguise the big G you sent me as a carriage when I turn around."

Get on the road! She learned all my essence!

I didn't rush to leave, but took a look at how Dai Lu installed the parts on their guns, because she led the design, the size is accurate to the millimeter, and the millimeter level is enough, because it is a soft connection, not a hard connection, and errors are allowed.

Soon, the hydraulics were mounted on the first gun, fastened with rivets, and pushed to the firing position, where another gun without hydraulics was placed next to it.

Dai Lu obviously did it for me, first fired the old cannon, after the projectile was fired, because of the strong recoil, the cannon slid back more than three meters, Bingbing didn't know much about the structure of the weapon, and asked in a low voice, "Why don't you use stones to jam the cannon wheels?" It's like shoving bricks under the wheels to prevent a car from skidding."

"The recoil of the artillery is much greater than the gravitational potential energy of the cannon itself, I explained, if you jam the wheels with stones, the recoil will turn vertically, and the cannon will jump up, what do you think, what if you are in a dense row of artillery groups, firing a salvo, the cannons are jumping around, smashing against each other? What if you hit the basket of shells in the back?" I explained.

"Oh," Bingbing nodded, it turned out to be the case, "So what's the use of this little thing?"

"You see, you see." I laughed.

Because the cannon retreated more than three meters away, it was about to hit the shell position behind, and, more importantly, there was an obvious lateral bargain in the direction of the muzzle, and the retreat was more than three meters away, and it was impossible for the two wheels to walk in a straight line completely, even if it was one or two degrees apart, the target direction would be much worse, dozens of meters or even hundreds of meters, and it would not be able to hit the enemy.

The strong, shirtless Yin soldier had to push it back into its original position, re-aim, and by the time the next shot was fired, two minutes had passed.

Seeing that Bingbing was sleepy, he yawned: "It's so slow! With this effort, the enemy cavalry will rush over."

"A cannon without a stopper, that's fast." I say.

Immediately afterwards, the same group of artillerymen came to the new cannon and began to operate according to Dai Lu's requirements, Dai Lu asked two soldiers to hold the gun wheels with their hands, and the two soldiers were very puzzled, under normal circumstances, if you want to use manpower to stop the recoil of the cannon, people's arms will be torn off!

"Why don't I come?" Dai Lu laughed.

Yin Bing naturally didn't dare to let her help in person, so he could only choose to believe in Lord Dai's scientific research results so as not to hurt them.