The King of Entry Level Immersion
A direct drive seat belt tensioner that increases sim racing immersion like no other device in its price range.
This innovative device transforms car simulations into an exhilarating and exceptionally authentic experience, setting a new standard for the intensity and authenticity of virtual driving.
Realistic G-Force & Braking Feedback
Experience the full weight of real-world forces as the QS-BT1 dynamically tightens the seatbelt during heavy braking and high-G cornering. Dual voltage channels deliver precise, real-time force as you hold a racing line, countersteer mid-drift, or swing through fast turns. The system adjusts belt pressure to mirror deceleration loads, lateral overloads, and centrifugal force—giving your body intuitive cues for braking points, apex pressure, and vehicle control.
Detailed Vehicle Dynamics & Surface Effects
Feel deep engine pulses, kerb strikes, and shifting road textures transmitted directly through your harness. The QS-BT1 accurately reproduces surface changes and power delivery across supported titles, adding the subtle tactile detail that brings simulation environments to life. Each gear change triggers a responsive belt tug, simulating the shift jolt found in high-performance vehicles for added realism and immersion.
Multi-Axis Flight & Advanced Simulation Feedback
The QS-BT1 supports G-force simulation across both vertical and lateral axes, making it ideal for racing and flight. It can replicate positive and negative Gs, throttle transitions, weapon recoil, and even flare deployment with precision. While motion platforms excel at short-burst effects, they struggle with sustained Gs—something even high-end 6DOF rigs can’t fully reproduce. The QS-BT1’s 200 N channelled system fills that gap, delivering the prolonged physical load your body expects.
Trust & Safety
• Designed with voltage protection and speed-limiting logic
• Force output tuned for immersion and user safety
• Compatible with integrated Motion-Lock circuits (QS-DD-20, QS-220, QS-V20)
• Optional external Motion-Lock switch supported with accessory
Qubic System QS-BT1 Direct Drive Seat Belt Tensioner with Trak Racer Seat Harness - Red Overview
QS-BT1 Dual-Channel Seatbelt Tensioner
Product Overview
The Trak Racer QS-BT1 is a high-performance dual-channel seatbelt tensioner engineered to simulate the real-world forces experienced in motorsport and aviation. From heavy braking and cornering G-forces to engine vibration and gear shifts, the QS-BT1 delivers responsive, immersive feedback that motion platforms alone can't match. Built for sim racing and flight sim enthusiasts who demand uncompromising realism.
Key Features
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Dual 200 N direct-drive motors (400 N combined force)
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Seamless integration with all Trak Racer and Motion Systems–powered platforms
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Compatible with racing sims, flight sims, and open-source WindSim projects
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Simulates braking, lateral Gs, gear shifts, road texture, and more
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Offers unmatched realism in sustained forces, gear transitions, and vehicle behaviour
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Advanced safety features including dual-channel self-test and Motion-Lock compatibility
Technical Specifications
| Specification | Detail |
|---|---|
| Force per channel | 200 N (20.5 kg / 45 lbs) |
| Combined maximum force | 400 N (41 kg / 90 lbs) |
| System type | Dual-channel, direct-drive belt tensioning |
| Compatibility | QS / PS / HS motion platforms, standalone, WindSim |
| Use case | Sim racing, flight sim, training, and experimental builds |
| Safety | Motion-Lock circuit compatible, dual-voltage motor logic |
Immersive Simulation Features
Braking Feedback
Experience the full weight of braking forces as the QS-BT1 dynamically tightens the seatbelt, giving physical feedback that mirrors real-world deceleration.
Advanced Steering Feedback
Dual voltage channels provide precise force during high-G cornering. The QS-BT1 reacts in real time, simulating lateral overloads as you hold a racing line or fight for control mid-drift.
Engine & Road Vibration
Feel engine pulses, kerb strikes, and shifting road textures through your harness. The QS-BT1 accurately reproduces surface changes and power delivery across supported titles.
Gear Shift Realism
Each gear change triggers a responsive belt tug, simulating the shift jolt experienced in high-performance vehicles.
Cornering G-Forces
As you swing through fast turns, the QS-BT1 simulates centrifugal force by adjusting seatbelt pressure, helping you intuitively feel the apex load.
Flight Simulator Integration
Supports G-force simulation across vertical and lateral axes. Simulates positive/negative Gs, weapon recoil, flare deployment, and throttle transitions with precision.
Why It Matters
Motion platforms excel at short-burst effects but struggle with sustained Gs. Even high-end 6DOF setups can’t match the prolonged physical load of a 200 N channelled system like the QS-BT1. By combining the two, you unlock layered realism: your motion platform handles the dynamic movements, and the QS-BT1 delivers the sustained physical forces your body expects.
Trust & Safety
-
Designed with voltage protection and speed-limiting logic
-
Force output tuned for immersion and user safety
-
Compatible with integrated Motion-Lock circuits (QS-DD-20, QS-220, QS-V20)
-
Optional external Motion-Lock switch supported with accessory
Supported Effects (Racing)
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Braking
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Lateral G-forces
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Cornering centrifugal force
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Wheel skid / lock
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RPM limiter
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Engine vibration
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Gear shift
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Oversteer / traction loss
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Road roughness
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Pre-impact simulation
Supported Effects (Flight)
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Positive & negative G
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Deceleration / braking
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Banked turns
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Cannon/missile discharge
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Flare deployment (where supported)







