Eagle Tree OSD Pro - Manual (Page 21)

Copyright © 2009-2012 Eagle Tree Systems, LLC
http://www.eagletreesystems.com
Page 21
10) If the model climbs too slowly, pitch adjustment may be needed, and/or, the “Climb” position you selected for throttle during the Servo Analysis
Wizard may need to be increased. If you are using the Guardian stabilizer, increase the “Max Stab Pitch RTH” parameter in the Guardian menu
(see the Guardian manual for more information). Additionally, or if you are not using the Guardian, increase the Pitch Proportional Gain.
Likewise, if the model climbs too rapidly, decrease the appropriate parameter, or reduce the “Climb” throttle position with the Wizard.
11) Once the model climbs at a reasonable rate, determine if it overshoots the climb (porpoises) when the model reaches cruise altitude. If it does,
increase the Pitch Derivative Gain parameter.
12) Fly your model so that it is flying away from Home, at approximately the selected cruise altitude level and below your maximum cruising speed
setting.
13) Activate RTH as described above. If you are using the menu method of engaging RTH, select the “Heading” or “Both” option. The model should
turn toward home.
14) If the model turns too slowly, turn/roll gain may need to be increased. If you are using the Guardian stabilizer, increase the “Max Stab Roll RTH”
parameter in the Guardian menu (see the Guardian manual for more information). If you are not using the Guardian, increase the Turn
Proportional Gain under the Safety Mode menu. If you find that a very large adjustments of the Gain setting is required, you may also need to
increase the Turn Proportional Limit value.
15) Likewise if the model turns too quickly, decreases the gains. If even low values turn/roll gain values move the ailerons or rudder too much, you
may need to decrease the Turn Proportional Limit parameter.
16) If the model turns at a reasonable rate, but overshoots the turn when the model reaches the home direction, increase the Turn Derivative Gain
parameter, until the model stops turning when pointing to home.
17) Fly your model so that it is flying directly away from home (near 180 degrees from home) which will result in a maximum turn. Then, observe the
model’s turn. If the model turns at a reasonable rate initially, but begins to turn too rapidly before reaching the home heading, decrease the
Integral Gain parameter. If the model still begins to turn too rapidly even with very low Integral Gain, decrease the turn/roll Gain setting and try
again.
18) If the model doesn’t seem to increase its turn rate much, even after turning almost 180 degrees, increase the Turn Integral Gain Parameter.
19) Turn off the “Test Return to Home” mode before attempting to land, to ensure that the test mode is not invoked during landing.
20) If you follow the steps above, and still have trouble adjusting RTH, we recommend you post your issue to the OSD Pro online forum, as described
in the “Have Questions or Feedback” section above. The community can provide you with tips and suggestions for settings with your particular
model.