Aerodynamic counterforce
The lamellae use propeller airflow to generate a force in the opposite direction to the torque effect, helping reduce unwanted roll input.
ATL · ANTI-TORQUE LAMELLAE
Counteracting torque with adjustable aerodynamic surfaces.
ATL is a modular anti-torque system developed by Virus PPG. Individual aerodynamic lamellae are mounted to the paramotor safety net, where their airflow creates a force opposing propeller torque. The system is tuned to the actual machine by selecting the correct rotation version and adjusting the number and position of its elements.
NETMounted to the safety net
CW / CCWRotation-specific versions
ATL UNIOption for alternative net geometries
12–14Typical starting set in the original guide
Independent from the frame
ATL is fitted to the protective net and does not participate in the structural construction of the paramotor.
Modular adjustment
Compensation can be refined by adding, removing or repositioning individual lamellae for the machine and its most-used power range.
Correct rotation version
Dedicated versions are selected according to clockwise or counter-clockwise propeller rotation.
Broad compatibility
The original ATL concept was designed for installation on more than 90% of paramotors, with ATL Uni intended for non-standard safety-net geometries.
Machine-specific tuning
Final placement depends on the engine, propeller, thrust line, cage, safety net and available clearance. Controlled test flights complete the adjustment.
INSTALLATION REFERENCE
Selection, placement and final adjustment.
The original ATL documentation provides a starting point. It is not a universal configuration for every paramotor.
- Mounting
- On the paramotor safety net; ATL Uni is available when the net differs from the standard 90 × 50 mm geometry.
- Version selection
- According to propeller rotation: clockwise or counter-clockwise.
- Typical starting configuration
- 12–14 lamellae for a typical 25 HP engine with a 125–130 cm propeller, according to the original guide.
- Positioning
- As far as practicable from the centre of thrust while preserving safe clearance to the propeller.
- Reference axial clearance
- 50–60 mm between the lamellae and propeller in the original installation guidance.
- Final adjustment
- Add or remove elements and validate the result during controlled test flights in the most frequently used power range.
Safety note: the figures above reproduce the original ATL guidance. The final number, location and clearance depend on the exact paramotor. Installation and flight testing must be carried out by a competent person. Re-tension the safety net and verify all propeller clearances before every flight.
ATL / SYSTEM DETAILS
A simple idea, tuned element by element.
Explore the installed system, individual lamellae, carbon versions and their positioning on the safety net.
ATL COMPATIBILITY
Match ATL to the exact machine.
Send Zhivko Matev the paramotor model, engine, propeller diameter, direction of rotation and clear photos of the safety net. We will confirm the appropriate ATL version and starting configuration.