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How does the Soko Kit work

The following is a basic description of the main steps to setup your helicopter using the Soko Kit. If you are not familiar with some points don’t worry. Just have a look at our manual.

The basic steps for a precise, easy and fast helicopter setup

The main steps are:

1. Bring main shaft into vertical level
2. Setup swash plate level, linkage length, servo points and zero (0°) pitch
3. Setup collective and cyclic pitch angles
4. Setup centre of gravity

1. Bring main shaft into vertical level

Depending on your helicopter, this can be done in two ways:

With head stopper disc

Your main rotor head is equipped with a thread for a M1.6, M2 or M3 screw on top of it, usually for a head stopper disc. Use the supplied screws of the Soko Helical to mount it on top of the main rotor head.

Now you have a platform for the Soko Gauge, or any other gauge or tool, to sit on.
Put some sheets of paper under the heli so the gauge value shows 0° for the absolute angle during a full turn of the head.

Without head stopper disc

Your helicopter head does not have a head stopper disc thread? No problem! Mount the Soko Kit as main blade, open the linkage of the blade grip and turn the blade grip until it rests on the side of the rotor head.

Put some sheets of paper under the heli so the gauge reads a constant angle (i.e. 68.2°) during a full turn of the head.

Valid for with or without head stopper disc: If your gauge just reads relative angles, calibrate it to spirit level or make sure that the shown angle, whatever it is, doesn’t change during a full rotation of the head.

Congratulations! Your main shaft is now in absolute (spirit) vertical position.

2. Swash plate level, linkage length, servo points and zero collective pitch

Mount the Soko Helical in one main blade grip. The Soko Helical supports the following dimensions:

• blade grip opening 3mm, screw M2 (equals main blade grips for standard 250 size)
• blade grip opening 4.5mm, screw M3 (equals main blade grips for standard 450 size)
• blade grip opening 10mm, screw M3 (equals main blade grips for standard 500 size)
• blade grip opening 12mm, screw M4 (equals main blade grips for standard 550/600 size)
• blade grip opening 14mm, screw M5 (equals main blade grips for standard 700 size)

Disconnect your motor and power up your heli electric system including your transmitter.

Set your electric system to setup the servo trims (servo mid points).

Change the linkage lengths (servo to swash plate) or the servo mid points so the gauge reads 0° absolute angle during a full turn of the head.

Once this is achieved leave your electric system as it is (set to 0° collective pitch). Mount the Soko Kit in the other blade grip. If the Soko Gauges doesn't read 0° adjust the linkage length (swash to blade grip) of the blade grip where the Soko Kit is mounted now.

Great! You successfully levelled the swash plate, setup linkage lengths, servo trims and achieved real 0° collective pitch.

3. Setup collective and cyclic pitch angles

With the Soko Helical and Soko Gauge mounted in the blade grip, setup your maximum positive and negative collective pitch as well as cyclic pitch.
The procedure is dependent of your gyro/FBL-system. The Soko Kit supports this procedure by measuring the angle of the blades.

You can also level your swash plate at full positive and full negative collective pitch if your gyro/FBL-system supports it.

4. Setup centre of gravity

When the Soko Kit is mounted according to step 1, align it to measure the elevator (nick) angle of the helicopter.
Now lift your ready-to-fly helicopter and read the angle on the Soko Gauge. You should aim to get as close to 0° (head stopper disc) or the final target angle (no head stopper disc - see manual for details) as possible by changing the position of the battery pack.