§
Hold the main rotor with one hand and attempt to turn the main gear
clockwise. It should not turn in this direction however it will turn counter
clockwise.
§
If the gear turns in both directions it could be a bad one way bearing
or your, a missing or sheared main gear bolt or metal main housing
bolt.
§
If the above checks out then your pinion gear is either loose
or not making contact with the main gear.
#6 Final Check
•
Before attempting hover or flight there are several areas to check and are not limited to the
following.
o
Binding
§
Disconnect your motor leads for safety
§
Give the heli full cyclic by moving the cyclic (right stick to the top right corner).
§
Spin the blades with your hand and watch and listen for any binding or rubbing.
§
TIP: watch the swashplate and if it moves or appears to bump then
something is probably hitting somewhere.
§
Continue doing this on the remaining three corners of the cyclic control (full top left,
bottom left, bottom right). The corners should be the full extent of motion but to be
safe check the entire range by moving the cyclic stick in a complete circle, or in the
case of the DX6 a square.
o
Clearance
§
Move all servos to their fullest extent in both directions.
§
Make sure servo arms do not touch, rub or extend into any moving part like
the main gear.
o
Gear Mesh (the amount of play between the main and pinion gear)
§
Finding the right gear mesh is very important. Although the gear appears round, it
will likely be slightly oval (egg shaped) having one or more high spots. Due to this it
will be necessary to have a tight mesh on the high sides of the gear in order to get
correct mesh on the low. If you were lucky enough to get a truly round gear then you
can have correct mesh all the way around. Clone that gear and send it to me.
§
Unfortunately its really not possible to visually verify mesh while the gears
are on the heli so we use our thumb to rock the gear and feel the mesh.
Look at the images below to see what you are feeling for.
§
If you get the mesh at the high side to where there is no gap, then your low side
mesh should be correct. If its not then your gear is seriously out of round and
probably not suitable to use. A gap as in the last image will result in a stripped gear.
**NOTES**
•
Flight Mode Switch
o
Switch at 0 = pitch settings of -3, 0, +10 and throttle curve of 0, 60, 100.