E-flite Pulse XT 25e ARF - Manual (Page 28)

28
Center of Gravity (CG)
The recommended center of gravity range for the Pulse XT 25e is 2.5 - 3.0”
(63 - 76mm) behind the leading edge of the wing. Before making this
measurement ensure that the model is in a ready-to-fly state, with all
components in place including batteries, hatches and radio equipment.
Place a piece of tape on the upper surface of each wing beside the fuselage
and mark the center of gravity location with a felt-tip marker. Suspend the
model iinnvveerrtteedd at the measured points on a commercial CG measuring device,
or it can be lifted with a finger at each of those points.
N Noottee:: If flying with floats please check the CG with model right side up.
The model should hang level when suspended at the desired point. The battery
pack can be moved forward or aft to correct any tendency for the model to
balance nose or tail heavy. Stick-on lead weights can also be used for this
purpose.
After the model is flown you may wish to adjust the center of gravity slightly to
suit your flying style. Use caution if moving the CG further aft as it will
decrease the stability of the model, and increase control sensitivity, particularly
the elevator. Moving the CG forward will have the opposite effect.
Preflight
Battery Charging
Use the recommended charger for the batteries being used in your radio and
model, and follow the charging instructions.
If using Lithium Polymer (LiPo) batteries be aware that they are significantly
more volatile than alkaline, Nickel Cadmium or Nickel Metal Hydride batteries
used in other RC applications. Follow the battery manufacturer’s instructions
and warnings closely. Mishandling or incorrect handling of LiPo batteries can
result in fire. Do not charge LiPo batteries unattended.
Refer to page 31 for more detailed information on handling LiPo batteries.
Range Testing your Radio
Be sure to range test your radio before each flying session, or when you have
made any repairs or changes to the model. Follow the instructions provided
with your radio to perform the range check, which usually involves limiting the
output power of the transmitter while checking model function at a prescribed
distance.
Final Checks
Before flying, make a last check of the model and it’s functions, especially if
you have made any setup or programming changes.
- confirm that all control surfaces move in the correct direction
- check the radio installation for security
- check motor installation and correct direction of rotation
- check the integrity of control surfaces and hinges
- check pushrods and control horns for security of attachment