Simple Flying Machine
A self-propelled flying machine using observers and pistons on slime blocks. The observer feedback loop creates continuous motion in one direction. Used for world eaters, TNT bombers, chunk loaders, and transportation.
Overview
The Simple Flying Machine is a redstone build whose job is automating an action or hiding a mechanism with redstone logic; form follows function here, so the layout is dictated by how it works rather than by looks. At 5x2x1 blocks (5 wide, 2 tall and 1 deep) it is very compact, covering a 5-block footprint on the ground.
It is rated intermediate: nothing here is exotic, but you will need a steady supply of materials and a little patience with shaping, depth and interior detail to make it look right. Following the 8 steps below, plan for about 15-30 min. The parts for self-propelled travel are obtainable in survival, but with 4 components packed into a tight space it is far easier to prototype the Simple Flying Machine in creative, get the timing right, then rebuild it where you actually need it.
The bulk of the work is the 4 building blocks that form the main body, alongside 5 different materials in total (about 11 blocks and items all told). The working heart is the redstone — sticky piston, piston, observer and slime block — which is what actually delivers the self-propelled travel. There is no dedicated light block in the core list, so add torches or lanterns yourself to keep it mob-safe after dark.
Materials Needed
Gather the 4 building blocks first, since it is the most-used block; the remaining 4 materials are accents and fittings used in smaller amounts. Mine roughly 10-15% extra of the main block to cover mistakes and a few decorative changes on a build this size. Make sure the redstone components (sticky piston, piston, observer and slime block) are crafted ahead of time, as those are the pieces most likely to be missing mid-build. Quantities are sized for the dimensions shown, so scale them up proportionally if you build a larger version.
| Material | Quantity |
|---|---|
| Sticky Piston | 2 |
| Piston | 1 |
| Observer | 2 |
| Slime Block | 2 |
| Building Block | 4 |
Click any material to view it on the Items database.
Step-by-Step Overview
A high-level construction order for the Simple Flying Machine, from the ground up. Each phase below covers several of the 8 in-game steps.
- 1Plan the layout for the Simple Flying Machine on paper or in a flat test world first; it gives you self-propelled travel, and that depends on exact block placement, so mark where every component sits.
- 2Lay the input side — the activation block that launches the Simple Flying Machine — and confirm the signal actually reaches the mechanism before you build the rest.
- 3Build the working half of the Simple Flying Machine: an observer-piston-slime loop that pushes itself. Connect it back to the input with dust, repeaters and torches.
- 4Hide the wiring behind blocks once the Simple Flying Machine works, but leave a hatch to any repeaters you might need to retune for timing.
- 5Trigger the Simple Flying Machine repeatedly from both states to be sure it never jams or desyncs before you build it into anything permanent.
Build Tips
- 1Observers create a clock when facing each other, powering the pistons continuously.
- 2Honey blocks can replace slime blocks and do not stick to slime, allowing detachable segments.
- 3Add a player platform with a fence to ride the machine.
- 4Break one observer to stop the machine.
Tips & Variations
The Simple Flying Machine has no light block in its core list, so add torches, lanterns or sea lanterns yourself: light every interior tile and the ground around it so nothing spawns on or beside the build overnight.
To resize the Simple Flying Machine, keep its 5x1 proportions and grow both axes together; stretching one direction alone tends to make it look thin. A half-size or double-size version both work as long as you scale the 11-block material list to match.
For a different look, swap the building block in the Simple Flying Machine for another palette that fits your biome: the shape stays identical, but the colour and texture of the main block changes the whole feel of it.
The most common mistake on the Simple Flying Machine is wiring before testing: power one section of the sticky piston and piston at a time and confirm it fires before you bury the redstone, because a single misplaced repeater driving the self-propelled travel is painful to find once it is hidden inside the wall.
Frequently Asked Questions
How hard is the Simple Flying Machine build?
It is rated intermediate: nothing here is exotic, but you will need a steady supply of materials and a little patience with shaping, depth and interior detail to make it look right. It is laid out in 8 steps and takes about 15-30 min to finish.
What blocks do you need for the Simple Flying Machine?
The main block is building block (around 4), and the full list runs to 5 materials — mostly building block, sticky piston and observer. Altogether that is roughly 11 blocks and items; the complete table with exact counts is above. It also needs the redstone components that make it work: sticky piston, piston, observer and slime block.
How big is the Simple Flying Machine?
It measures 5x2x1 blocks — 5 wide, 2 tall and 1 deep — which is very compact and takes up a 5-block footprint. You can shrink or enlarge it by keeping those proportions.
Is the Simple Flying Machine survival-friendly?
The parts for self-propelled travel are obtainable in survival, but with 4 components packed into a tight space it is far easier to prototype the Simple Flying Machine in creative, get the timing right, then rebuild it where you actually need it.
Does the Simple Flying Machine work on its own once built?
It does not run continuously — the Simple Flying Machine sits idle until you trigger it, then performs its action (self-propelled travel) and resets. Once wired correctly it works on demand every time, with no upkeep beyond the occasional retune if the timing drifts.
What makes the Simple Flying Machine different from similar builds?
It is best understood through its focus on flying, machine and slime. Those traits drive the material list and layout described above, and are what set this redstone build apart from a generic self-propelled travel build.
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