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4.
Install pilot and cockpit detail if desired (not
included).
5.
Glue the canopy in place using Zap canopy
glue. Do not glue the canopy in place without
the hatch cover mounted on fuselage and
screwed in place. It is easy to distort the hatch
and it will not fit properly if not mounted while
gluing the canopy on.
Switch and Battery Mounting
1.
The prototype balanced with an OS 1.2 four
stroke with no added weight by putting the bat-
tery pack on top of the motor box under the
cowl.
2.
The switch can be mounted in the balsa sheet-
ing under the wing on either side.
Balance and Control Throw
s
CG Balancing
Balancing the Yak is very important, you
might need to use weight depending on
the servos and engine that you use. Start
out with the balance point at 6-1/4”. This
balance point is a safe place for you to fly
the Yak at. As you get comfortable you
can move the CG back further. The fur-
ther you move the CG the more wild the
aerobatics will become,
BUT
the more
unstable the Yak will become
Throws
We have provided two sets of throws.
Use the lower throws on the first flights
then work your way up to the higher
throws. Do not use the higher throws till
you are ready.
LOW
HIGH
Elevator 1” UP& Down
All you can get
Ailerons 3/4” Up & Down
All you can get
Rudder 1-1/2” Right & Left
All you can get
When you have gotten comfortable
flying the YAK slowly increase the throws
while still staying within your flying ability.
Flutter Problems
Any model with large control surfaces such as the
Yak can experience flutter. It is your responsibility to
make sure all linkage is in good order and very tight.
Servos must be in good shape with control arm that
are not worn. You must fly the plane in a manner
that does not cause it to over speed , you must use
throttle management. Flutter is not covered under
warranty.
