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Please read the following very carefully:
The hardware (bolts, screws, nuts, etc.) used in the construction of this helicopter are relatively small, so a great deal
of care should be taken when installing and tightening them. No torque values are provided, as few hobbyists have
torque wrenches capable of working with such small amounts of torque. For example:
requires 1.8 Nm torque, which is about 1.8 kg with a lever length of 10cm. In case of an M2 bolt (approximately
0.5Nm) and M2.5 (1.1Nm) screws, even more care is required. It is advisable to hold the allen driver with just
two fingers (between thumb and index finger) in order to avoid applying too much torque.
All metal-metal should be secured with medium strength
fastener (bolt or screw), threaded into an aluminum part or steel nut. The threadlock should be applied to the first 3-4
turns of the fastener. If the fastener is passed through a plastic part, then threaded into a aluminum part or nut,
threadlock should be applied to the inside of the threaded part so that it does not come into contact with the plastic (a
small diameter piece of wire can be very helpful). Threadlock can damage some plastics.
Fasteners threaded into plastic components can be secured with medium superglue (cyanoacrylate-CA).
of CA is especially helpful if the plastic part has been used several times and the hole into which the screw/bolt is
threaded is worn. Be very careful not to over tighten screws into plastic components. Too much torque can strip the
plastic fairly easily.
Self-locking fittings, as nylon lock nuts, are used in several places on the helicopter. The friction of the nylon ring
prevents the bolt or screw from backing out. Do not use threadlock or other adhesives on nylock nuts, as this could
Nylon lock nuts should be not be re-used, as the friction is greatly reduced after one use.
damage the nylon.
Compass Model always takes care to use high quality ball bearings, but
periodically, or after a crash. Avoid oils to lubricate the bearings, as these are not pressure-resistant and can wear the
bearings faster. If required, use special ball bearing grease to lubricate bearings. Pressing the grease into the bearing
can be difficult. Special devices are available to press grease past the bearing shields and into the bearing itself. Most
ball bearings require no grease during their normal life. Many bearings hold up for hundreds of flights.
Damaged or rough running ball bearings should be replaced immediately. A rough or grinding ball bearing can
cause serious damage to the helicopter.
The thrust bearings in the blade grips may feel rough when no tension is applied. Under load the thrust bearings
should move smoothly and without any rough spots (pull both blade grips outwards and rotate them). The thrust
bearings in the main and tail rotor blade grips must always be greased.
Ball links and balls are subject to wear, over time.
turned by placing a rod through the eye of the link. Damaged or loose ball links must be replaced immediately. Ball
links are always snapped onto the ball with the Compass logo facing outwards. Ball links manufactured by Compass
Model are usually slightly stiff on the ball when new. The links must be sized with a link sizer (Compass part number E-
XQT-01). The links should snap firmly onto the ball and move without drag. Once the links develop noticeable play on
the ball, the link and/or ball should be replaced.
Flying of model helicopters is always a safety risk. Avoid flying in the following areas: public places, crowds, busy
roads, and power lines. NEVER FLY OVER PEOPLE! Flying of radio controlled models is active participation in
aviation! Please respect the regulations in your country. It is not advisable to go alone to the flying field.
A detailed pre-flight inspection is a must of the following is required:
ball links, the function of electronic components and, finally, the entire helicopter itself. Always perform a test (direction
test on all axes) of the flybarless system before you take off.
If you hear strange noises during the flight, or a change in flying characteristics, land immediately. Never accept a
safety risk!
Rotating parts can cause serious injury. Do not spool up the rotor when the helicopter is in your hands or tied/strapped
to the ground. A helicopter restrained in such a manner can be destroyed by resonance.
Always keep a safe distance (minimum 7m) to yourself or others, parked vehicles, etc..
RC-helicopters are not toys and therefore should be assembled, flown, and maintained carefully and
Basic Information / Grundlagen
threadlock. A metal-metal connection is any steel
even the best bearings need to be checked
To avoid damage, they should never be gripped with pliers or be
All bolted connections, screws, wiring, pins,
A metric M3 screw grade 10.9
Use
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