Cobra Helicopter Goblin 500, Руководство пользователя

Страница: 29 / 40

Maintenance
*On the Goblin 500, some areas to look for wear include:
* Motor belt
* Tail belt
* Dampers
* Main gear and pinion
*The lifespan of these components varies according to the type of flying. On average it is recommended to check these
parts every 100 flights. In some instances, based on wear, these parts should be replaced every 200 flights.
*The most stressed bearings are definitely those on the tail shaft. Check them frequently. All other parts are not particularly
subject to wear.
*Periodically lubricate the tail slide movement and its linkages as well as the swash plate movement and its linkages.
*To ensure safety you should do a general inspection of the helicopter after each flight. You should check:
* Proper belt tension (motor belt and tail belt).
* Proper isolation of the wires from the carbon and aluminum parts.
* All screws remain tight.
After a crash, please inspect the carbon servo mounts (H0245 or H0246) to make sure they are not cracked or weakened.
Failure to check and detect a possible crack could result in a future crash if a carbon servo mount breaks in flight.
In Flight
The Goblin 500 has been tested at head speeds as low as 1800 rpm and as high as 3000 rpm. However, due to the nature of the head
and dampening system, the model could exhibit swaying phenomena at some lower head speeds between 1800 rpm and 2400 rpm.
This phenomena is noticeable in the elevator axis and can present itself at different head speed ranges based on the types of blades
used, flybarless system gains, etc., usually this goes away by increasing or decreasing the head speed in order to move away from the
harmonic’s rpm.
For 3D flight, it is recommended a head speed of 2400 rpm or higher, at these higher head speeds, the phenomena is non-existent as
the machine is then outside this harmonic range.
The Goblin 500 uses the HPS head (High Precision System)
The dampening system of this head allows for a wide range of head speeds to be used without sacrificing safety.
The dampening preload is set for optimal flying characteristics at a wide range of rpms, it is recommended not to change the preload
by adding or removing shims.
Copyright@2013 - SAB Heli Division - All rights reserved
Page 27
Chapter 17, Maintenance