Great news! The very much anticipated "Monster" Velos Rotors LLC 880 now available for pre-orders via and only at HeliDirect.com. Be sure to set up your pre-order today to ensure your place on the first batch which will be very limited in quantity.
Velos 880 – Twice as powerful
Velos represents a breakthrough in RC helicopter design enabling performance unheard of in this size class. Traditional designs are limited by a single motor and ESC. This constrains them heavily in the cost/performance in this size class. Velos takes a completely fresh approach that breaks through to a new level of performance with its innovative twin motor design.
Velos 880 is a model helicopter that has been in R&D for the last three years. Every part of this model has been designed from the ground up with main goals: Simplicity and performance. We have not compromised either in building this helicopter. Its aerodynamic and streamlined shape exploits the laws of physics in order to minimize drag and allow for superior top speed.
The center of gravity on the vertical axis is just 13 to 14 cm under the main rotor which gives Velos 880 a unique responsiveness. The skids are angled in two axes allowing minimal drag when the helicopter is pointing forward. Additionally, they are 40 cm wide and acting like shock absorbers during landings and take offs. A three-point landing gear is been implemented using the two main skids and the tail fin as the third point of support. The tail fins have been moved from the left side to the center of the tail case in order to maintain a better aerodynamic balance and provide better support for the three-point landing gear. Tail boom is made of carbon fiber with a 40mm outside diameter for an unusually strong and lightweight construction.
The mechanics of Velos are a key differentiator compared to any other product in the market. The heart of Velos is a very sophisticated gearbox that combines the power from two high performance brushless motors and transfers the total power to the main and tail rotors while maintaining the highest possible efficiency. There is a smart fault isolation system that is activated in case of a component failure (motor, belt, esc, battery pack or pinion gear) during a flight. The gearbox can automatically disengage the stopped motor without introducing any drag to the rest of the transmission. This allows the helicopter to continue its flight normally and prevents it from crashing, resulting in superior reliability. In fact, the model is able to make a normal sport flight with only one motor in operation.
The above configuration allows power levels that in other cases will not be possible due to excessive weight thus breaking the barrier of 800 sizes for 3D flight. Another important benefit from this configuration is that you do not have to spend a fortune buying the latest high-end 800 size motors and escs together with expensive 7 cell batteries. In fact you can use two budget 700 or even 600 size motors and escs which costs much less than the latest 800 systems yet their total power output easily outperforms the above.
Velos 880 is using a twin, double stage gearbox.The first stage is using belts to transfer the power from the motors and it is using solid motor mounts. There is no need to push or pull the motors in order to apply tension to the belts; instead, there is a double rail tension system, which makes the removal and adjustment of the belts a 30 second process by simply tightening just one nut for each belt. The second stage of the gearbox is using gears and has been based on a special geometry configuration to allow the transfer of outstanding amounts of power to the main rotor with the smallest possible gear size. In addition, the whole mechanics can be easily removed for maintenance by removing just four screws. The power to the tail rotor is been transmitted through a belt and two pulleys. The large diameter of the boom allowed us to eliminate any idler pulleys and tensioners for the tail belt. That way the power transmission to the tail rotor is simple and effective.
The rotor head of Velos 880 has been designed from the ground up. At the core of the flybarless head there are two independent spindle shafts that enable different flapping angles in each blade (in proportion to the momentary forces that are acting on them). This design achieves a wider RPM operating range with fewer vibrations in low and higher RPMs respectively.