Cobra Helicopter Goblin 500, Manual

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HC074
HC206
HC212
H0265
Operations Before Flight
*Set up the transmitter and the flybarless system with utmost care.
*It is advisable to test and verify all the settings on the transmitter and flybarless system without the main or tail blades on initially.
*Check that all wiring is isolated from the carbon/aluminum parts. It is good practice to protect them in the areas where they are at
most risk.
*Be sure of the gear ratio, verifying carefully the motor pulley in use. The forces acting on the mechanics increase enormously with
increased rpm. Although the Goblin can fly at high rpm, for safety reasons we suggest to not exceed 2900 rpm on the Goblin 500.
*Check the correct tension of the tail belt, use common sense; the belt should be tight enough, but not too tight.
*Fit the main blades and tail blades. (Fig.1 and Fig.2)
*Please make sure the main blades are tight on the blade grips, you should be able to violently jerk the head in both directions and
the blades should not fold.
*Check the collective and cyclic pitch range. For 3D flight, set about +/- 12°-13°. The outer marks in the blade grips and head hub
indicate 13°.
*It is important to check the correct tracking of the main blades.
*On the Goblin 500, in order to correct the tracking, adjust the main link rod as shown in figure 3. The threads are opposite, one side
clock-wise and the other side counter clock-wise, this system allows for continuous fine adjustments of the length of the control rod;
it is not necessary to detach any of the ball links.
*The tail of the Goblin 500 is quite unique in the sense that the tail hub is dampened like the main rotor head. It is normal for the tail
slider to be a bit tight in the very beginning as the tail spindle preload is usually a bit high when the helicopter is brand new. The
preload will loosen up after a few flights once the o-rings start to wear, it is completely normal for the tail blade grips to have what
appears to be “lose dampening” over time.
*Perform the first flight at a lower head speed than normal, for example 2400 rpm. After this first flight, do a general
check of the helicopter. Verify that all screws and bolts are correctly tightened.
Serial Number
Serial Number Tag
In bag 9, you will find the serial number tag for your
helicopter. Install the tag on the servo support plate as shown.
Please remember to register your product.( See page 1 )
HC111
Flat Head Socket Cap M2,5x5
(HC128-S)
Serial Number
(H0286)
Copyright@2013 - SAB Heli Division - All rights reserved
Page 26
Chapter 16, In Flight