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Hirobo's XRB ( X-rotation blades system ) has excellent features, primarily stability and solid tail control.
The XRB is equipped with a strong motor and coupled with direct current which constantly feeds it, serious climb outs are only a few tick away.
The XRB is so stable that we at HeliHobby were actually able to break a record time of 56 seconds of hands free flying in an indoor room.
Many think the two rotor system will only give you cyclic control, however full rudder ( tail ) control is still flawlessly achieved, making
the XRB Lama operate just like any normal main rotor / tail rotor Heli thus teaching the pilot all of the necessary coordination, compensations, adjustment skills and maneuvers required to fly ANY RC Helicopter.
1. Rotor head section - The upper rotor head always maintains stability because the horizontal-keeping stabilizer mechanically makes the rotor cyclic when the body is inclined during flights. The lower rotor head is a stabilizer-less head mechanism. This allows precise control with extremely fast response in steering time. The slide type swash plate is moved by two geared motors (servo) in the horizontal direction, in which and at the amount in which the body is tilted back and forth, and from side to side.
2. Slide type swash section - This slide type swash plate is a unique mechanism having been developed for this machine, which does not cause linkage sliding friction during steering time. Since the motors are not burdened, the up-and-down torque balance is not lost, so that the axial rotation becomes stable. Also, since the construction is simple, the height can be designed low, which is an advantageous feature of this machine. (Utility model pending). Adoption of geared motors to move the slide type swash plate efficiently has realized a weight reduction and miniaturization.
3. Electronic control section - In rudder control (yawing axis; rotation of the body), the direction is changed by changing the torque through generation of differences in rotational frequency between the upper and lower rotors. By increasing or decreasing each motor output distribution for the upper and lower rotors with our original electronic circuit, the body can be traversed with up-and-down movements minimized. (For the gyro, a piezoelectric element type is used.)
The XRB can be hovered freely by combining ascending and descending, back-and-forth and side-to-side, and traverse operations with the right and left sticks on the proportional control system type controller. The operating methods are the same as those of conventional radio-controlled helicopters. Off cause, it is also suitable for practicing face-to-face hovering, pirouette (on-the-spot traverse), etc.
By simply connecting the attached adapter to a home outlet as a power source, even beginners can handle it easily. The power and control signals are sent through the access cable (4m) between the controller and helicopter body. This system has advantages such that power can be supplied stably; there is no worry about radio interference; and battery replacement or charging is not needed.
Flights have been adjusted one by one so that you can fly right after your purchase. Even in the cases where readjustment is required such as at the time of rotor replacement, only three points need to be adjusted. The rudder neutral can easily be adjusted since it can be checked visually with the direction-indicating LED lamp.
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