Engineering
Within Medieval Engineers there is actually an engineering aspect implemented while dealing with the smaller dynamic block building mechanics of the game. One of the first tasks a new player will come across is the difficulty of building a cart. This can be a confusing implementation for new players on trying to understand how to properly implement and build a working cart.
Cart
To get started with building your first cart your going to need a couple of items. Some timber, at least four catchblocks and at least four wheels. If you are unsure if you know that knowledge to make these items yet then simply check the Medieval Engineers Research Tree.
Now after acquiring all the resources needed we can now start to form a cart. The easiest way is to start by creating a support beam to work off of.
Then its time to build the farm of the cart. Imagine it similar to how a basic car frame would be with the wheels. Be sure to change to dynamic building when placing the wheels onto the catchblocks and make sure they are facing the right way onto the catchblocks or there will be drag.
Lastly you can customize your cart with anything you need.
Catapult
There are stationary and mobile catapults, a mobile one is just simply built onto a cart in some way. The below example catapult will be stationary. The resources needed to build this catapult will be one catapult bucket, one rope torsion spring, one rope end, one hand crank wheel and one rope drum with a bunch of timber.
First start by building the basic frame.
Then attach the arm and the bucket on the end with the rope end at the very end of the timber arm. Along with a timber and catchblock support to hold the rope drum, along with the hand crank wheel.
Now use a rope and connect the rope end to the rope drum and crank it together to get ready to load and fire.
Finally load the catapult by either clicking on the bucket if you have a Large Projectile in your inventory or manually load into the bucket.
Now its time to test out the catapult and experiment with different techniques.