Dualsky CRS3500 MKIII Contra-Rotating Propulsion System – FAI F3A Competition

The Dualsky CRS3500 MKIII Contra-Rotating Propulsion System is a high-precision electric propulsion solution engineered for applications where maximum thrust efficiency, torque neutrality, and aerodynamic stability are essential. Designed around Dualsky’s advanced contra-rotating architecture, this system drives dual counter-rotating propellers from a single integrated brushless motor assembly, significantly reducing torque-induced roll while improving overall power utilisation.

Developed for FAI F3A competition aircraft, the CRS3500 MKIII is widely respected for its ability to deliver smooth, linear throttle response, stable flight characteristics, and repeatable performance under demanding conditions. The contra-rotating design enhances directional control and efficiency, making it a preferred propulsion system for precision aerobatic platforms.

Beyond competitive RC aviation, the CRS3500 MKIII is also suitable for engineering research, propulsion experimentation, academic projects, UAV development, and laboratory environments where balanced thrust systems and airflow symmetry are being studied or deployed. Its system-level design makes it ideal for applications requiring controlled torque behaviour, efficiency optimisation, and mechanical balance.

Supplied as a genuine Dualsky product, the CRS3500 MKIII is backed by manufacturer quality standards, with professional technical guidance, after-sales support, and scalable supply options. This makes it suitable not only for individual specialists and competition pilots, but also for institutions, research teams, and bulk procurement.

Key Advantages / Features

Contra-rotating propulsion architecture for torque-neutral operation

High-efficiency brushless motor system

Designed for FAI F3A precision aerobatics

Improved thrust utilisation and aerodynamic stability

Smooth, linear power delivery across the throttle range

Suitable for RC, UAV, research, and engineering applications

Manufacturer-backed quality and long-term reliability

Minimum Order & Supply Terms

Standard MOQ: 7 units

Accepted minimum order: 4 units

Orders below 4 units may be considered subject to stock availability.

This structured quantity policy supports consistent supply, quality control, and reliable after-sales support, while still offering flexibility for development, testing, and specialised applications.

Support, Warranty & Long-Term Use

This product is supplied as a genuine Dualsky propulsion system and is covered by the manufacturer’s warranty. We provide pre-sale and post-sale technical support, including system selection guidance, installation considerations, and application advice.

We support individual pilots, resellers, universities, research labs, and engineering teams worldwide. Whether purchasing a single unit or equipping multiple platforms, you can buy with confidence knowing that we actively look after our customers and provide ongoing support.

Replacement components and compatible accessories are available to support long-term operation and system maintenance.