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& Tricks - How
to make your Co-Ax heli fly as smoothly as possible
page is dedicated to the KOB, Llama, Co-Comanche etc fliers out there.
of these small coax helicopters tend to vibrate quite a lot, and this
vibration really can upset their flying capabilities quite
helicopters are best at hovering, and they will do this almost hands off
once set up correctly. It is therefore essential to ensure that
your Coax is setup correctly.
first and most obvious thing is a bent mainshaft. These MUST be
next thing is to only just pinch the blades when fitting them so that
they are really nice and free to swing on their bolts. If you
tighten these even a little too much, you will find you will have
that the settings on the gyro are correct so that you do not have to
correct the tail in a steady hover. Having to trim them or hold
tail correction on will take quite a bit of power from the motors.
It really is worth spending some time on this. The best time to do
it is when the battery is about half used.
blades with broken tips. Get some carbon fibre blades, they are
silly, but try to balance the blades overall weight as a pair if
ENHANCE HANDLING PERFORMANCE
the CNC upgrade for the flybar holder. This holds the flybar
securely, and has a cap on top so when you crash, it will not keep
popping out, which soon results in a worn plastic connector.
the CNC Swash plate, it is miles better than the plastic one.
best modification here is to get (or make) and extended inner mainshaft
(the one to the very top set of blades). You can add about 4 inches to
the stock length quite safely. What this does is gives a bigger
differential between the two sets of contra rotating blades, and this
will let you get more response from ALL cyclic inputs. There are
some after market components to hold the top rotor hub up, but I find
that some electrical tape around the shaft immediately above the bearing
works just fine and for quite a long time without wearing out.
possible on your helicopter, and especially when it has a CNC swash,
move the connecting rod to the outmost servo horn hole to get more
movement from the swash plate.
the flybar upwards about 1 inch from the centre hub. Bend it to an angle
of about 20 degrees upwards or slightly more. This provides better
control as the flybar is a little less effective at holding the top
can also cut away some of the tip weight on the flybar as well.
the motors to the Extreme versions, these are quite a bit more powerful