To make a flying machine in Minecraft, place a sticky piston facing forward, an observer behind it with its face looking into the piston, and a slime block attached to the piston's head. This simple engine will propel you across the sky as long as the chunks load.
How to make a flying machine in Minecraft: what you need
You will need slime blocks, sticky pistons, observers, and a temporary block. Slime blocks are crafted from nine slime balls, which drop from slimes found in swamp biomes or deepslate caves. Sticky pistons are crafted by combining a piston with a slime ball. Observers require cobblestone, redstone dust, and nether quartz. The temporary block can be any solid block you can break quickly, like dirt or cobblestone.
Building the engine: observer and piston setup
- Place a sticky piston on the ground facing the direction you want to fly.
- Put an observer directly behind the sticky piston, with its redstone face (the small dot) pointing into the back of the piston.
- Attach a slime block to the front of the sticky piston (the moving head). This slime block is the core of your propulsion unit.
When the observer detects a block change in front of it, it powers the sticky piston, which pushes the slime block forward. The observer then sees the slime block move and triggers again, creating a continuous cycle.
Extending the chassis with slime blocks
Attach additional slime blocks to the first slime block to form a platform. Slime blocks will stick to each other, so any block you place adjacent to the engine will move with it. Leave one block of space on top of the platform where you can stand or ride. The machine will carry you along as it moves.
Adding a second engine for two-way flight
To make your flying machine reverse direction, build a mirrored engine on the back. Place a second sticky piston facing backward on the far end of your slime block chassis. Put an observer behind that piston with its face looking into the piston. Attach a slime block to the back of this second piston. Now the machine can be triggered to fly forward or backward depending on which observer you activate first.
How to start and stop your flying machine
To start the machine, place a temporary block directly in front of the observer's face (the side with the four small squares). The observer sees the block appear and sends a pulse to the sticky piston, beginning the flight cycle. The machine will keep moving until you break a key component. To stop it, simply break one of the slime blocks or the sticky piston while the machine is running. The machine will halt immediately because the chain of blocks is broken.
Troubleshooting common flying machine problems
If your machine flies backwards, you placed the observer facing the wrong direction. The observer's face must look into the back of the sticky piston, not away from it. If the machine breaks apart mid-air, you likely used regular pistons instead of sticky pistons, or you attached a non-slime block to the slime chain. Every block in the moving part must be a slime block or a honey block, or the machine will disconnect. If the machine gets stuck on unloaded chunks, you have flown too far from your spawn point. Build a chunk loader or simply turn around and fly back into loaded territory. For the best results, use a design that relies only on slime blocks and sticky pistons, since any other block will cause the machine to fail.
