ARKDynamics
Rendering of the complete RSCV021 build: six-motor hexapod base, aluminium cockpit chassis, steering wheel, pedals and button box

Portal Development Kit · build RSCV021

PDK
Ecosystem.

A six-degree-of-freedom motion platform built on patented enhancements to the Stewart platform (CA 3217174 C). Three motor blocks, six direct-drive motors and three pneumatic cylinders that carry your weight, so the motors only move you.

Four builds What ships Spec sheet

At a glance

Nine figures that describe the build.

Each carries its source. Dotted figures are tracked claims: measured from the RSCV021 CAD model, verified against a primary source, or from ARK's published specification.

1.20× 1.00 m

footprint with the racing chassis

1.57m ⌀

diameter on the extension feet

1.13m

height to the seat-tower top

115kg

mass, full build

6motors

in three identical blocks at 120°

21bit

encoders, 2,097,152 positions

297

distinct parts, 1,847 placed

6–9

boxes by build, each ≤ 26 kg

<1ms

game to motion

How we know thisThe full spec sheet

Four builds

One platform. Choose how much of the rig you bring.

The same motion core in every build. The feet and table, the chassis and the ARK peripherals are the difference.

RSCV021 cockpit with ARK wheelbase, wheel, button box and pedals fitted

ARK Approved

$8,499.99USD

PDK + ARK Ecosystem

Everything in the render at the top of this page: PDK base, aluminium chassis, ARK direct-drive wheelbase, wheel, button box and pedals. The complete machine, one order.

Grid-position holders: $5,499.99 with your code.

Order — $8,499.99

Made to order · Batch One: ready to ship in an estimated 3–6 months

RSCV021 with the aluminium cockpit chassis fitted

RSCV021 chassis build

$6,299.99USD

PDK Racer

The base build plus the extension feet and table, and the aluminium spaceframe cockpit chassis engineered for the platform's forces: steering-column uprights, centre bracket and pedal tray. Bring your own wheelbase, wheel and pedals.

Previously listed as PDK + Aluminium Chassis.

Order — $6,299.99

Made to order · Batch One: ready to ship in an estimated 3–6 months

RSCV021 base build on extension feet with the two-piece wood table fitted

RSCV021 free-standing build

$5,299.99USD

PDK + Extension Feet & Table

The base build on extension feet with the two-piece wood table fitted. Free-standing, so it needs no floor anchors — a workstation rather than a cockpit. On the feet it stands 1.57 m across — three legs at 120°, so plan the space as a circle rather than a rectangle.

The PDK plus the $400 feet-and-table option.

Order — $5,299.99

Made to order · Batch One: ready to ship in an estimated 3–6 months

RSCV021 base build: hexapod motion platform with flat top, no cockpit

RSCV021 base build

$4,899.99USD

PDK

The motion core with a flat top. Three motor blocks, six direct-drive motors, three pneumatic cylinders, platform. Bolt it to the floor and mount anything: racing seat, flight cockpit, VR setup, research fixture.

Shipping quoted separately.

Order — $4,899.99

Made to order · Batch One: ready to ship in an estimated 3–6 months

Codes
  • Grid-position holders — nothing is charged to hold a position and none are being sold. If you already have one we email you a personal code. It opens the private builder channels and claims the full PDK + ARK Ecosystem at USD 5,499.99, the PDK + Extension Feet & Table at USD 3,599.99, or the bare PDK at USD 3,499.99. One use, tied to your email.
  • The code applies to three builds — the PDK, the PDK + Extension Feet & Table and the PDK + ARK Ecosystem — at the prices shown at checkout. It does not move the PDK Racer. Prices are fixed on our server — in USD for the United States and the rest of the world, in euros for the EU; shipping is quoted separately.

What ships

The Ecosystem ships in up to nine boxes. Nothing over 26 kg.

One person can carry every box. Open them in the numbered order and the assembly sequence follows.

9

boxes at most (Ecosystem), none over 26 kg

14

steps, feet first

Exploded shipping plan of RSCV021: box 1 feet, boxes 2 to 4 motor blocks, box 6 services and piston set, box 7 platform and cockpit, box 9 extension feet kit
The box plan, measured from the CAD model
BoxContentskgOpen
1 · Feet3 monoblock floor mounts (recycled sintered rubber, aluminium rail channel) + rails. One foot style ships: straight, V-in or V-out≈26*1st
2 · Block ACompressor-bay block: base + motor-mount monoblocks, 2 motors, capacitor, ArkDrive13.02nd
3 · Block BValve-bay block, same core13.22nd
4 · Block CBare block, same core13.32nd
6 · Services + piston setCompressor, valve block, centre distribution board, router, tanks, blue tube kit, 3 pistons with brackets, 6 con rods with rod eyes23.73rd
7 · PlatformPlatform monoblock, plywood covers, pressure plates16.34th
8 · Cockpit + steeringSpaceframe, pedal tray, steering assembly. Ships with the PDK Racer and Ecosystem builds12.45th
9 · Extension feetOptional accessory: 3 × T-slot 40 × 80 × 400 arms, sliding nuts, single mounts, pressure platesopt.with 1

* CAD-solid mass; the feet monoblocks are thick-walled, so the real box reads lighter. All masses are CAD-measured until a scale confirms them.

Assembly

Fourteen steps, feet first.

From the shipping boxes to a complete build, in the order the boxes open.

Assembly sequence · 14 steps
  1. Feet down — three floor mounts at 120°, rails up. Drill and bolt each to the ground.
  2. Motor blocks onto the feet — blocks bolt to each other and to the feet on rubber isolators.
  3. Compressor placed in its bay on its mount plate.
  4. Valve block placed in the opposite bay.
  5. Blue pneumatic lines — compressor to manifold to cylinders and buffer tanks, push-fit.
  6. Centre lower case seated on the rubber mounts at the machine centre.
  7. Capacitor power leads through the case slots — the heavy DC bus.
  8. Three power leads bolted to the underside of the distribution board.
  9. Board down and bolted; centre covers close it up.
  10. Three ribbon cables from the board to the three ArkDrives.
  11. Con rods onto the table, then table onto the base: rod eyes onto the motor cam axles, pistons pinned.
  12. Pedal tray to the platform front.
  13. Steering uprights, left and right.
  14. Steering assembly as one piece into the centre bracket.

Extension feet, when ordered, bolt to the feet after step 1. Sequence verified against the CAD interfaces.

52 seconds from the shipping boxes to the finished build, rendered from the CAD model. Nothing loads until you press play.
Exploded view of RSCV021: cockpit chassis, steering wheel and platform lifted above the six-motor base
Exploded view: cockpit and platform above the motor blocks.

Specifications

System components.

Major hardware, electronics and peripherals of the RSCV021 build, in three tables. Dotted figures are tracked claims; their sources are listed under the tables.

Envelope

How far it moves

Single-axis limits, every other axis at neutral. The axes trade against each other, so no axis reaches its maximum while the others are working.

AxisRangeTotal span
Surge−75.49 … +82.74 mm158.23 mm
Sway± 71.92 mm143.85 mm
Heave± 58.68 mm117.35 mm
Pitch−7.98° … +8.09°16.07°
Roll± 8.68°17.36°
Yaw± 9.80°19.60°
Payload—up to 250 kg
Platform mass—115 kg

Envelope read from the T1 firmware boot banner, 2026-07-07 capture. A combined-axis “extended” envelope is larger, and it is published when it is measured. Size a cockpit around every pose the platform can reach, and leave clearance beyond these figures. The envelope in full ›

Subsystem 01

Motion control

Six direct-drive motors in three identical blocks, three dual-axis drives, one bus. Nothing between a motor and the platform it moves.

ComponentSpecification
Servomotors6 × direct-drive outrunners in 3 blocks · 132 mm · 53.3 V · Kv 13.5
Motor buildCast-aluminium bell on a steel drum, 30 magnet bars, SKF bearings, 21-bit encoder on a flex PCB
Position sensing21-bit magnetic encoders · 0.000171661° per count
Motor controllers3 × ArkDrive dual-axis · 53.3 V · 56 A per motor channel to the ArkDrive · field-oriented control
DistributionArkDrives plug directly into the centre distribution board (ribbon interconnect)
BusesSPI to encoders · CAN bus for system communication

Subsystem 02

Weight compensation (patented)

Air carries the static load, so the motors spend their budget on motion instead of holding you up. This is the part the patent covers.

ComponentSpecification
Pneumatic cylinders3 × 50 mm bore · 140 mm stroke, with ballast tanks
Operating pressure6.0 bar maximum
Valve block10-station manifold
CompressorIntegrated HC210B on rubber mounts
ControlAutomatic load monitoring and adjustment

Subsystem 03

Power and control electronics

One universal supply, a capacitor bank sized for the bursts, two controllers. Every loop quoted here runs inside the platform.

ComponentSpecification
Power supply3 kW universal input · 100–290 V AC
Capacitor bank3 × 0.47 F · 63 V on a 25 mm² DC bus · >30 kW burst
Static hold power15 W
Primary controllers2 × ARM Cortex-M7 @ 600 MHz — Housekeeper (HKP) and Motion Cueing Processor (MCP)
Control loops8 kHz drive loop per motor · position commands 1 kHz · all internal
Safety2 × mmWave presence radars standard · up to 6 for 360° coverage · emergency stop
NetworkingEthernet to the PC · onboard Wi-Fi router and Ethernet switch, serving the tuning dashboard
How we know this
  • CAD-measured items come from the RSCV021 model inventory (297 parts, 1,847 placed solids), read directly from the design files. gnosis L0–L2, 2026-07-14/15
  • Capacitor value: 0.47 F / 63 V per the electrical bill of materials and the designer's own specification; the CAD part label "0.5 F" is the vendor's nominal name. verified 2026-09-08
  • Loop rates are internal control loops, not a telemetry promise to a game or PC. L7

The technology in depth

Configurations

Feet, covers and where it stands.

Three foot styles, an extension-feet accessory, and the covers and trays that ship.

Configuration 01

Feet

One style ships with every kit.

  • Straight — the standard footprint
  • V-in — V-feet pointing inward
  • V-out — V-feet pointing outward, ≈80 mm further out per station on the same bolts
  • Motion envelope is identical across all three

Configuration 02

Extension feet

An accessory, shipped as its own box.

  • Three T-slot arms with sliding nuts and single floor mounts
  • Makes the platform free-standing for labs, studios and shows
  • Stacks on any foot style
  • Price: +$400 with the wood table on the bare PDK; included with every kit above it

Configuration 03

Covers and trays

What closes the platform and where the pedals sit.

  • Platform covers: plywood 10 mm ships; carbon 4 + 4 mm as an option
  • Pedal tray at the front; the table is three-fold symmetric, so up to three tray positions are possible
  • Fixed installation: bolt the feet to the floor. This is the standard case

Software

Drive it with FlyPT Mover, or with your own code.

FlyPT Mover is a free, independent motion-cueing tool with a large library of supported games. The PDK integrates with it out of the box. The list of supported titles is FlyPT Mover's, not ours, and grows on their schedule.

Developers can stream six-dimensional pose commands directly to the platform over the network and build motion experiences no game has shipped yet.

How it works

Inside the box

What the box does

  • Receives a 6-D trajectory stream
  • Solves inverse kinematics per frame
  • Commands six direct-drive actuators
  • Reports position from six 21-bit encoders
  • Holds you up with air, so the motors only move you

Order

PDK Ecosystem

$8,499.99

USD

US prices include import duty, with sales tax shown at checkout where we must collect it. EU prices are in euros with VAT and import duty included. Everywhere else, import VAT, duty and customs fees are payable to customs or the carrier on delivery and are not included in the price; we cannot calculate them in advance. Shipping is quoted and billed separately when your unit is ready. Paid in full at order. Grid-position codes apply at checkout.

Made to order · Batch One: ready to ship an estimated 3–6 months from order confirmation. Shipping billed separately.

Order

Made to order · Batch One: ready to ship an estimated 3–6 months from order confirmation

Before you order
  • What is covered — 24-month Limited Warranty on the kit, from delivery, in addition to your legal rights. Full refund until your Production Notice.
  • Your legal rights — consumers in the EU have a legal guarantee of at least 2 years from their seller, free of charge. Consumers in the EU and the UK may return the kit within 14 days of delivery, any reason; everywhere else, the same 14 days is our promise to consumers.
  • Where we ship today — online ordering is open for the United States, the European Union and the rest of the world, except Quebec and British Columbia. EU orders are priced in euros with VAT and import duty included; everywhere outside the EU, in US dollars. The region you choose at checkout sets the price and the tax basis.
  • Who you buy from — it depends on where it ships. To the United States and the rest of the world: ARK Dynamics Global, a Wyoming corporation, in USD. To the EU: ARKINEMATICS LIMITED, a Cyprus company, in euros, with VAT and import duty included. ARKINEMATICS is also our EU authorised representative for product safety and our EU data-protection representative.
  • When it is ready — expected 3 to 6 months from order confirmation; delays of up to 12 months beyond that are possible. Paid in full at order.
  • Changing your mind — full refund until your Production Notice; after it, Terms 5.1 applies. On a 14-day return you pay the return carriage to our US return address, about USD 500 by sea, and more from remote addresses.
  • The contract — Terms of Sale & Use and Shipping Policy. The Terms include the model withdrawal form.

Order through the configurator — pick the build, apply a grid-position code if you hold one, and pay at checkout. Prices are fixed on our server — in USD for the United States and the rest of the world, in euros for the EU; shipping is quoted separately when your unit is ready.

FAQ

Before you order.

Do I need to assemble it?

Yes, from pre-assembled modules, in fourteen steps, feet first. Every box is under 26 kg, so one person can do it. The Safety Manual and Installation Guide ship with the kit; the Kinemaniacs community site, where owners will share build notes and tuning profiles, is in development.

What is the difference between the four builds?

Four builds share one motion core. The PDK is the core with a flat top — mount your own seat or rig. PDK + Extension Feet & Table adds the wider feet and a desk-height table top, for a workstation rather than a cockpit. PDK Racer adds the aluminium cockpit spaceframe. PDK + ARK Ecosystem adds the ARK direct-drive wheelbase, wheel, button box and pedals: the complete machine.

How does the grid-position code work?

Existing grid-position holders are emailed a personal, single-use code that claims the PDK + ARK Ecosystem at USD 5,499.99, the PDK + Extension Feet & Table at USD 3,599.99 or the PDK at USD 3,499.99 (in the EU: €5,599.99, €3,699.99 and €3,599.99). The grid-position code applies to those three builds only.

Which games work?

Any title supported by FlyPT Mover, which is free to use. FlyPT Mover maintains that list. You can also drive the platform from your own software.

What does the patent cover?

Enhancements to the Stewart platform architecture including the passive load-compensation system: patent CA 3217174 C, granted 11 February 2025. See Patents.

Where do the numbers come from?

Every figure on this page is tracked to its source: the RSCV021 CAD model, a primary document, or ARK's published specification.

All questions