The Library

After the successful development of the steam engine, Ren Baqian directed the students to work on the deceleration and braking systems. He went to the empress to ask for steel.

The next goal was to build a circular railroad track with a diameter of 400 meters outside Lan City.

Just building a train that could run wasn't enough because the load factor, speed, and other aspects needed to be tested.

It wasn't currently possible to build a long railroad track since Dayao wasn't rich in iron resources. Thus, a circular track was the best choice in this situation.

However, what Ren Baqian wanted was a rail that required 50 kilograms of metal per meter, which was equivalent to 100 kilograms for the two rails of the track. The circumference was 1,300 meters for a railroad track that was 400 meters in diameter. Therefore, 130,000 kilograms was required.