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- Fitting an Esky CNC head to your Belt CP
Many Belt CP owners
decide to fit a complete Esky CNC (aluminium) rotor head to their Belt
CP's as one of the first upgrades they are likely to do.
Well that is just fine,
although I would personally recommend that you first of all compare the
price of the other common options, which are the CopterX head and the
Align Trex 450 head, which are most certainly better quality that the
Esky CNC offering, and are very little different in price
if you have already committed to an Esky CNC head,
there are a few thing
YOU REALLY MUST DO.
The first and most
important thing is to dismantle it COMPLETELY, and then ensure that all
of the parts are fitted correctly, followed by THREAD LOCKING ALL
THREADS that go into the CNC. You do not need to use Thread lock where
bolts go into plastic, BUT IT IS ESSENTIAL TO DO SO IN CNC or you will
very soon discover that they will vibrate out, almost certainly causing
you to crash, or possibly something even worse.
The other thing to note
is that if your head comes in several pieces, DO CHECK THE DIAGRAMS to
ensure you assemble the parts correctly.
I just had an older Belt
CP v1 come through my Heli-Hospital after a substantial crash, and the
owner had apparently purchased a new Esky CNC head for it due to the
damage caused to the original one in the crash. The owner had
assembled the head, and at first glance it all looked fine, but further
investigation found that the feathering shaft bearing housings were
fitted back to front, the shim and thrust washers were incorrectly
fitted, ALL of the screws and ball connectors were actually LOOSE in
their relevant threads, and the washout linkage had been fitted upside
down. Had this helicopter been flown, another crash
would almost certainly have have occurred in very short order.
NB - It
is not necessarily just Esky CNC parts that need checking for thread
locking, you should ALWAYS CHECK ANY CNC ASSEMBLY to ensure the bolts
are thread locked.