CARGO CREWLift depot
PAUSED
Tension
Balanced force does not remove velocity.

Choose a delivery

One shared device. Each console contributes to the same motor tension. Cargo mass and force limits stay the same for every crew size. The crew are operators, not extra platform mass.

The original cart routes and the mechanism workshop remain available from the greenhouse.

Plan → test → improve

Choose total tension and duration for each phase. Start and brake deliberately, then hold balanced tension for the settle time. The last tension remains applied when the plan ends.

This explicitly restores the current leg’s starting checkpoint, including its height and zero velocity. Opening or closing this panel never resumes motion.

Paused · the moving assembly

Recent events

    Up is positive. Motor tension, weight and any visible shaft/latch support act on the whole platform-plus-parcel system. Net is their sum, not another force. Impulses are N·s; no peak impact force is invented.

    No friction, air resistance or hidden dock brake. A successful settle pauses with the measured velocity unchanged. Pressing Secure applies an explicit latch impulse and holds the platform. The floor and ceiling are visible inelastic end stops.

    Build a lift puzzle

    Change a room, test it in the same game, then return here to improve it. Built-in missions are never overwritten.

    Import a level JSON

    Data only. No script, links, external uploads or student sharing.

    The editor and built-in rooms use the same schema and validator. Device drafts stay in this browser; downloads stay with you. No server storage or sharing is added.

    A calculated delivery

    1. Read total mass, target height and maximum tension. Each console adds to the motor’s total upward tension.
    2. For upward acceleration, total tension must exceed weight. To slow an upward-moving lift, reduce tension below weight.
    3. Balanced tension means zero acceleration, not zero velocity. Plan your braking point.
    4. Settle within the marked tolerance at low speed with near-balanced net force. Then choose Secure to latch the platform.
    5. Use checkpoints and the phase planner to compare your prediction with the measured result. In the builder, make a new puzzle and test it with the same physics.

    Space toggles Run/Pause outside fields and dialogs. All controls are buttons or labelled inputs. A paused trial preserves velocity. Blur, hidden tabs and every dialog pause the simulation.

    Physical iPad multi-touch and performance have not been tested. This depot uses stationed crew consoles; it does not add free walking, swinging ropes or crane dynamics.

    Open the mechanism workshop · Return to the cart routes