minecraft

Engine A, 2-way
Two-way engine A, Top layer
Two-way engine A, Bottom layer
Dock for two-way engine A, side view

No slime, 2-way
No slime block, one-way engine
No slime block, two-way engine, Top layer
No slime block, two-way engine, Bottom layer

Engine B, 2-way
Two-way engine B

Turbo engine A
Turbo engine A layer 1
X
X
Turbo engine A layer 2

Ride-able, 2-way
Ride-able two-way engine, top layer
Ride-able two-way engine, bottom layer

Diagonal engine
Diagonal engine, layer 1
Diagonal engine, layer 2
Diagonal engine, layer 3
Diagonal engine, layer 4