ok, ho trovato questo:
Citazione:
There are two trimms at the 4 in 1 helicopter electronic unit (receiver+speed control+mixer+gyro=4) labeled gain and proportion. Gain trim adjusts the gyro sensitivity and proportion trim adjusts the relation between the upper and lower rotor r.p.m. If ,with the rudder trimmer centered, the heli tends to rotate right (tail left) you will have to turn the proportion trim about 10 degrees to the right at a time and try again. Every time you adjust the proportion or the gain trimm, disconnect the battery from the heli and connect it again to restart the 4 in 1 unit with the new adjustments.
Keep in mind that ,the gyro of this heli is not a "head hold" one, so a little drifting is normal especially as the battery gets discharged.
Kostas from Athens.
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Quidni proverò a darci dentro di "proportional +" stasera e vediamo.
PS... che voi sappiate esiste un head-hold gyro per il LamaV4?