Hangar 9 Alpha 40 ARF Trainer - Manual (Page 47)

47 Hangar 9 Alpha 40 ARF Assembly Manual
Balancing your Alpha ARF
In order for your Alpha 40 ARF to fly correctly, you will
need to check the balance of the plane with the fuel tank
empty. This is done by supporting the aircraft either using
your fingers or by using a balancing stand. Not checking the
balance can result in an aircraft that is difficult to fly, which
can lead to the possibility of crashing your model.
 Marking the Balance Point
The first step in balancing your Alpha 40 ARF is to mark the
location for the balance point. The ideal balance point for the
Alpha ARF is 2 3 /
4
–3 inches (70–76mm) back from the leading
edge against the fuselage. If your plane is only slightly out
of balance, try placing the balancing stand towards the nose
or tail by 1/8-inch (3mm) and recheck the balance. If it looks
good and sits level, then you’re good to go.
 Lifting the Model and Observations
Make sure the Alpha ARF is balanced using either your
fingers or a balancing stand. Place or lift the airplane so it is
supported at the marks made in the previous step. The plane
will rest level when balanced correctly. If not, weights must
be added to correct any balancing problems.
Balanced Correctly
Nose Heavy – Add Weight to Tail
Tail Heavy – Add Weight to Nose
Adding Weights to Correct the Balance
Due to manufacturing differences, it is possible that the Alpha
40 ARF may not be balanced properly. Weights can be added
to either the tail or the nose of your Alpha ARF if it does not
balance properly. Stick-on weights (Self Stick Weight, 6 oz
HAN3626) available at your local hobby store are the easiest
to use, and come in sizes that are easily placed on your plane.
Add just enough weight as necessary to balance your plane.
Once the weight has been added, make sure it is secure and
will not fall off in flight.