Lemonergy Start with the visual story, then build the subsystem experiments. For pack comparisons, vessel packaging and coupled vehicle dynamics, open the Engineering Study →.
PHYSICS LAB · FREE 3D EXPLORATION
Roadster Physics Lab.
Watch. Explore. Build.
Explore how suction, stored air and battery power interact. Watch the 3D ramp reconstruction, select a component, then assemble and run its Lemonergy blocks. This lab builds intuition through focused subsystem experiments.
WATCH FIRST / COMPLETE VEHICLE BEHAVIOR
Approach. Climb. Hold. Release. Right. Land.
Watch a reference-led reconstruction of the demonstrated inverted-ramp stunt, including the stationary suction hold before release. Then isolate, rebuild and test each Lemonergy subsystem below.
Complete inverted-ramp stunt
Second-generation Roadster · drag to orbit · scroll to zoom · switch on Cutaway to inspect Lemonergy systems
Preparing the complete co-simulation…
Model boundary: phase ordering follows the public demonstration; timing, geometry and force values are explicit engineering estimates synchronized with native Lemonergy battery, fan, suction, contact and thrust studies—not Tesla telemetry.
START HERE / SEE THE COMPLETE THING FIRST
The whole run in one view.
First understand what happens from beginning to end. After that, open each system, block and result in detail.
Begin the complete event
The request contains the approach speed, vehicle mass, fan command and starting battery state.
Driver schedule + system inputsBuild suction
The battery powers the fan system, which creates the pressure difference needed for adhesion.
Battery + fans + plenumSolve 79 blocks
Exactly 92 wires carry mass, force, torque, voltage, current and state signals through the native solver.
Same graph shown belowRoadster responds
It climbs the curved road, decelerates at the top and remains stationary in the inverted pose.
One synchronized clockExplain the outcome
Position, suction, contact reaction, power, current, SOC and limits arrive together as plots, records and exports.
Motion + numerical resultsThe complete 3D event is a reconstruction with authored motion. A shared clock connects its phases to the displayed subsystem quantities. The four native experiments let you inspect and reproduce the separate force and energy calculations.
Watch the complete simulation →THEN EXPLORE EACH PART
Follow the seven checkpoints when you are ready to inspect and reproduce it.
- 01Choose the missionHold, lift, roll or refill
- 02Watch the full runStart, event, response and finish
- 03Trace the hardwareBattery → air system → forces
- 04Build the blocks79 blocks, 92 exact wires
- 05Change the systemCell, pack, mass and hardware
- 06Read the evidenceMotion, power, SOC and limits
- 07Compare and exportBaseline, CSV, model and run record
Battery pack → native electrical blocks
Select any labelled component in the 3D view to see how Lemonergy models it.
BUILD IT. RUN IT. REPRODUCE IT.
From Lemonergy blocks to the simulation.
Assemble the same model in five stages. Each stage adds real Lemonergy blocks and their wires. Run the completed graph to drive the 3D simulation and plots, or download the exact recipe and rebuild it yourself.
This free builder includes every required block. For manual editing in Simulation Studio, use catalog 2026.10.1 with the Vehicle and Math blocks; an older Studio catalog cannot run this model. Reopen accepts this lab’s model files and computes fresh results.
1. Set the inputs
Loading the exact model recipe…
Exact blocks, parameters and input-port wiring for this stage
Use the palette block shown, set its ID and output quantity, then enter every listed parameter. Connect the source block’s output to the destination row’s input port: in0 is the first input. Feedback wires may connect to a later stage.
| Block ID / name | Palette block | Output quantity | Exact parameters | Wire into each port |
|---|
Solver settings and signals to plot
Use these exact solver values. Add Display or Scope to the following block outputs. All quantities are SI; SOC is a fraction and the page displays it as a percentage. Roll angle and angular acceleration use the catalog’s Number quantity, interpreted as rad and rad/s².
Build the five stages to enable the native run.
| Metric | Reference | Reproduced | Check |
|---|
CHECKPOINT 05 / CHANGE THE SYSTEM
Make the experiment yours.
CHECKPOINT 06 / READ THE EVIDENCE
Where the energy goes.
All plots share the vehicle’s clock. Tap or drag one plot to move the Roadster, forces, block outputs and every graph to the same instant.
Electrical power
kWTotal DC demand Baseline
Battery state of charge
%Charge counting with constant nominal OCV and an ohmic resistance model.
Contact reserve
kNNegative normal reaction means contact cannot be maintained.
INSIDE THE APPLICATION
The same blocks behind every number.
This overview is a guide to the model. Open the full graph for the actual connections, parameters and solver outputs; gas thrust is powered by stored compressed air, while fans and refill draw battery power.
Inspect the full native block diagram
Select a block to read its parameters.
Select a block or its Scope button to trace that signal. Drag the plot to move the shared simulation cursor.
Read the numeric outputs at the cursor
| Quantity | Value | Quantity | Value |
|---|
ENGINEERING NOTES
Explore an idea.
Keep the assumptions visible.
This is an independent Lemonergy engineering study of suction, gas propulsion and battery demand. The shared reference informed the request for visible physics. The controls, block model and simulated trajectories are authored for Lemonergy. The second-generation exterior uses Tesla Roadster 2020 by metarex.4d, under CC BY 4.0, with adapted materials, lighting and placement. The cutaway hardware is schematic and does not depict Tesla’s production engineering.
Open the Engineering Study →What each experiment actually solves
Surface adhesion: a static floor, wall or ceiling check, with a 10 s battery run. The required reaction is N = Fₛ + mg cos θ and the grip reserve is μ max(0, N) − |mg sin θ|. A failed check shows an unsupported pose, not a prediction that the car remains attached.
Vertical lift: thrust and gravity determine height; the mass decreases as air leaves. The run is displayed through the first sampled return to the ground plane. It does not predict body impact, suspension travel or a safe landing.
Airborne roll: the lift burn ends before two balanced roll-jet pulses. Each couple has zero net translational force; τ / I drives angular speed and angle. Both opposed jets consume air at 2|τ| / (d vₑ). Constant roll inertia and unchanged tank pressure are assumptions. This is one-axis rotation, not a six-degree-of-freedom vehicle model.
Tank refill: the compressor draws power until the tank is full or the chosen time expires. The stated isothermal estimate is w = R T ln(p₂/p₁) / η. Flow equals P / w; this is a study operating point, not a compressor map.
Battery, component data and validity
The cell choices and pack mass come from Lemonergy’s pinned Designer / Garage parts snapshot. Each cell retains its source basis and estimated fields. Candidate S/P layout is editable and is not a claimed Roadster configuration.
The pack uses constant nominal open-circuit voltage U and series resistance R. I = 2P / [U + √(U² − 4RP)], V = U − IR, heat = I²R, and dSOC/dt = −I/(3600 Q). Negative U² − 4RP flags infeasible electrical demand. Cell continuous current, contactor/fuse carry current and the 5% study SOC floor are checked; pulse capability is not assumed.
Fan pressure and power scale with command squared and cubed. The seal is ideal and fixed hardware does not become stronger when a heavier pack is selected. No OCV–SOC curve, temperature dependence, RC polarization, pressure blow-down, leakage, cooling system, aging, BMS or structural limit is solved. Beyond a rating flag, the trace describes hypothetical demand.
Public nominal ratings do not independently validate these vehicle scenarios. Thrust, inertia, fan operating point, timing, body/rig mass and compressor inputs are editable authored assumptions.
Reproduce the run and trace the sources
Use the guided block builder above, then run the assembled graph. Download the block-by-block recipe for every parameter, wire, solver setting and reference result. Reopen the native model in this lab to rerun it, or import it into Simulation Studio with catalog 2026.10.1 and the required blocks. The model includes its input assumptions, component provenance and engine hash. CSV contains the displayed native samples; the run record includes the graph, solver identity and validity flags.
- NASA Glenn: thrust and equivalent exhaust velocity
- OpenStax: static friction and normal load
- OpenStax: torque and rotational inertia
- Pinned Lemonergy cell, component and mass records
- Original lab source & tests (AGPL; asset licences included) · Current page and routing source overlay · Native graph author · Existing engine corresponding source
- User-supplied visual reference · Tesla demonstration reference · Tesla: The Ramp | Roadster (ramp profile)
The illustration is not CAD; representative cells, tank volume and nozzle positions are schematic. Force arrows use a fixed scale with a display cap, while numeric values remain uncapped.
| Part | Value |
|---|---|
| Profile | run-in → bend → vertical wall → bend → ceiling back over the approach → lip |
| Bend radii | 7 m bottom · 7 m top |
| Vertical wall | 5.5 m |
| Ceiling | 19.5 m above the runway · 12 m long · lip 12 m in front of the ramp foot |
| Deck width | 3.4 m |
| Tyre contact | both tyres placed on the surface at every instant (wheel geometry from the licensed model) |
| Suspension on the bends | body rises up to 11.5 cm; the model’s splitter sits 10.8 cm above the road 0.81 m ahead of the axle and would otherwise touch the deck |
| Hold | fully inverted (180°) with the nose at the lip |
Ready to test the engineering?
The Engineering Study compares battery packs, checks cylinder mass and packaging, and solves road motion or a separate six-degree-of-freedom vehicle case. Inspect measured cell profiles, explicit limits and reproducible run evidence.
The lab and study use Lemonergy blocks with different model boundaries. Lab playback is not a feasibility result; settings and results are not automatically transferred.
Open the Roadster Engineering Study →