RPL Engine Workbench · local Apple silicon workflow

The pressure-fed engine design workbench for this design cycle.

Size the engine, injector, and nozzle; export DXF contours and review-ready reports; and inspect nozzle/plume behavior in Flowfield Studio from one local Apple silicon app.

The $199 six-month term is Academic Pro Semester: educational, non-commercial use for a verified student. Commercial licenses are on the pricing page. Use remains subject to engineering judgment, safety review, export-control and sanctions compliance, and license terms.

RPL Engine Workbench on macOS: Flowfield Studio tab for a solved NTO/Aerozine50 engine case, showing the quasi-1D mapped flowfield preview, mesh and preflight details, and PDF, PNG, and DXF export buttons
LocalNo cloud requirement
DXFCAD handoff
FlowfieldDesign insight
Mac-native local workflow Pressure-fed liquid focus Injector/nozzle sizing DXF CAD handoff Review-ready reports Flowfield visuals where supported

Download and trial

Download the Mac app. Trial mode is built in.

RPL Engine Workbench is a native Apple silicon Mac app for pressure-fed engine sizing, injector and nozzle workflows, reports, DXF handoff, and Flowfield previews where supported.

  • PlatformCurrent public build: Apple silicon Mac
  • TrialNo license key is required to start trial mode.
  • Paid unlocksAcademic and Business licenses unlock Basic, Pro, or Team scope.
  • Buy pathStart with the trial, then use pricing to buy the license tier you need.

Does RPL fit my workflow?

Best fit checklist

  • FocusPressure-fed liquid preliminary design workflow
  • OutputsReports, DXF, media/visual exports, Flowfield visuals where supported
  • Best forUniversity teams, startups, contractors, review prep, CAD handoff, assumption tracking
  • Not a substitute forQualified engineering review, test, safety review, or export/compliance review

Integrated propulsion workflow

Fewer spreadsheet handoffs. More consistent assumptions.

Use one native workbench to move from chamber targets and propellant choices to injector sizing, nozzle contours, DXF export, reports, and flowfield visualization. The same solved case drives the geometry, review outputs, and inspection views.

Fast pressure-fed iteration

Evaluate cases from thrust, mass flow, throat diameter, injector geometry, or feed tank pressure without rebuilding the workflow each time.

Injector sizing

Size doublets, triplets, and showerhead concepts with orifice sizing, pressure drop, momentum ratio, ligament checks, and O/F consistency.

Nozzle geometry

Generate bell, conical, and TIC contours from solved engine states, then inspect throat, exit, length, expansion, and separation context.

Local desktop execution

Run the core workflow locally on Apple silicon Mac. No cloud requirement, no browser-based engineering state, no remote compute dependency.

Flowfield Studio

Integrated flowfield visualization for design insight and validation planning.

Flowfield Studio gives engineers a built-in way to inspect nozzle and plume behavior during design. It supports density-gradient views, plume visualization, residual status, transient playback, and export tools in the same workflow that defines the engine case.

Density-gradient visualization Transient playback Plume diagnostics Image/video export

Final decisions remain grounded in qualified engineering review and test data; Flowfield Studio is designed to make the comparison and validation-planning process faster and more traceable.

Transient nozzle startup playback inside Flowfield Studio.
Transient Mach-number playback as exported, with solver provenance and preliminary-status banner.
Flowfield Studio transient playback controls and residual status panel
Transient playback controls, frame slider, speed, loop, and export.
Native macOS interface of RPL Engine Workbench showing engine sizing inputs
Native Apple silicon Mac interface, local/offline workflow.

Geometry and DXF export

Move solved nozzle contours into CAD without rebuilding the profile manually.

RPL Engine Workbench exports nozzle geometry as DXF for CAD review, machining discussions, and downstream design handoff. The export is tied to the solved case, so geometry and report assumptions stay aligned.

Contour workflows
Bell, conical, and TIC nozzle profiles.
CAD handoff
DXF output for profile review and machining reference.
Traceability
Geometry, warnings, and performance basis stay connected to the same solve.
Nozzle contour exported as DXF geometry for CAD handoff
Export solved nozzle contours for CAD review and machining discussions.
Engine sizing summary report generated by RPL Engine Workbench
Reports collect solved outputs, assumptions, warnings, and export context.

Reports and exports

Share solved cases with the assumptions visible.

Generate engineering reports, images, charts, and Flowfield media for design reviews. Reports are built to communicate what was solved, which assumptions were used, and where engineering review or validation work remains necessary.

PDF reports PNG images Transient frame export DXF geometry

How it works

From download to licensed workflow.

Start locally on an Apple silicon Mac, run representative cases, and buy the license tier that fits when you are ready.

Download the Mac appGet the current signed and notarized build for Apple silicon Mac.
Open trial modeNo license key is required to start the built-in trial.
Run casesUse sample cases or your own preliminary cases for sizing, reports, and supported previews.
Buy a licenseChoose Basic, Pro, or Team scope when the workflow fits your needs.
Activate your tierPaste or activate the license key to unlock the paid features you purchased.

Licensing

Academic, team, and business licenses for Apple silicon Mac.

Academic licenses are for non-commercial, educational use only; Business licenses permit commercial use. Basic covers sizing, injector/nozzle workflows, DXF export, and reports; Pro adds the full Flowfield Studio (steady preview + transient playback) and VTK export. Business Pro runs Flowfield at the highest resolution.

Academic Basic

Non-commercial · core tools

$99per year

Educational use only. Named-user license.

  • Engine sizing, injector, and feed-system tools
  • Nozzle contours (bell, conical, TIC)
  • DXF export; PDF, CSV, and JSON reports
  • Save projects; unlimited saved cases
  • No Flowfield Studio; no VTK export
Buy Academic Basic

Academic Pro Semester

Non-commercial · with Flowfield

$1996 months

Educational use only. Verified student; named-user license.

  • Everything in Academic Basic
  • Full Flowfield Studio: steady preview + transient playback
  • VTK export; high Flowfield resolution
  • Six-month term for semester projects
Buy Academic Pro Semester

Academic Pro

Non-commercial · with Flowfield

$299per year

Educational use only. Named-user license.

  • Everything in Academic Basic
  • Full Flowfield Studio: steady preview + transient playback
  • VTK export; high Flowfield resolution
  • Highest Flowfield resolution is Business Pro only
Buy Academic Pro

Academic Team Pro

Non-commercial · university team

$699per year

Educational use only. Team license; seat count follows the Freemius plan configuration.

  • Academic Pro features for a university team
  • Full Flowfield Studio + transient playback + VTK export
  • One onboarding session; sample cases
  • Email support
Buy Academic Team Pro

Business Basic

Commercial · core tools

$399per year

Commercial use permitted. Named-user license.

  • Engine sizing, injector, and feed-system tools
  • Nozzle contours (bell, conical, TIC)
  • DXF export; PDF, CSV, and JSON reports
  • Save projects; unlimited saved cases
  • No Flowfield Studio; no VTK export
Buy Business Basic

Business Team Pilot

Commercial · small team

$1,599per year

Commercial use permitted. Team license; seat count follows the Freemius plan configuration.

  • Business Pro features for a small team
  • Full Flowfield Studio + transient playback + VTK export
  • Highest Flowfield resolution
  • Onboarding; priority email support
Buy Business Team Pilot

Start with the built-in trial, then buy the tier that fits your work. License scope, support scope, and compliance responsibilities are stated in the applicable terms.

Tutorials and learning

Practical walkthroughs for the full engine workflow.

Tutorials are organized around the steps engineers repeat most: setting up a case, choosing propellants, sizing the nozzle, exporting DXF geometry, sizing injectors, running Flowfield Studio, reading residuals, and exporting reports or media.

Run Flowfield Studio

Select fields, inspect density-gradient visualization, and read convergence status.

Get started

Put RPL Engine Workbench in your own review workflow.

Download the current Mac build, start in built-in trial mode, and run sample cases or your own preliminary review workflow before buying a license.

Supports design review, exports, and documentation. It does not replace qualified engineering review, test, safety review, or export-control review.