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2026-09-02T14:11:38Z

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==Rudder rate consistency (Point D)==
At PARAMETER MENU point D the rudder rate consistency can be adjusted. This parameter comes into play when the tail gyro is operated in HeadingLock mode. It determines how hard the tail gyro tries to maintain a given rotation rate from the transmitter. If the value is set too low, pirouettes will be inconsistent during fast forward flight or in crosswind conditions, and the helicopter will slowly drift on the vertical axis when in stationary hovering flight with crosswinds. If, on the other hand, the setting is too high, the tail gyro will respond with a delay to fast directional changes, and the rudder stick control will feel very imprecise. Additionally, the tail might bounce slowly after stopping a rotational movement and oscillate gently while hovering or flying around. So only adjust this parameter as high as necessary. 
 
{{QUOTE|Parameter menu point '''D''' only adjusts part of the tail gyro control loop. First of all, you must adjust the tail gyro gain via the transmitter and use it to switch the gyro to HeadingLock mode.
* Before adjusting the rudder rate consistency, always try to find the maximum amount of tail gyro gain by flying around and using the tail gyro in HeadingLock mode.
* After adjusting the rudder rate consistency, it might be necessary to readjust the tail gyro gain! Both parameters interact with each other.}} 
 
{{TABLEV5|Rudder rate consistency
|very low
|low
|medium
|high
|very high
}} 
 
{{QUOTE|'''Additional information''' 
Please note that poor tail performance is very often a sign of stiff tail mechanics, slop in the tail linkage, or an inadequate rudder servo! In this case the tail rotor system does not react as precisely as necessary and prevents the tail gyro from working properly. If you cannot increase the rudder rate consistency further than "very low" or "low" without the tail rotor starting to oscillate slowly or bounce after coming to a full stop, it is very likely that there is a mechanical issue. Likewise, if the tail does not turn consistently at high speeds, or does not turn at all even with the "very high" setting, this may again be due to a mechanical cause. 
 
Make sure that the maximum blade pitch at the tail rotor is neither too large nor too small. A large pitch angle can lead to a stall of the tail rotor blades; the tail rotor then produces hardly any thrust, similar to a very small angle. Also check that the entire tail mechanics run smoothly and without binding. Make sure the rudder servo is strong enough and supplied with sufficient power (long supply leads cause high voltage loss!). Check that the rudder servo does not lose power at maximum servo deflection - this can happen if the pulse range of the servo is exceeded. Lacking tail thrust can also be caused by tail rotor blades that are too small or too soft, or by a tail rotor speed that is too low. 
 
For better tail gyro performance also check for correct servo horn length. If the tail gain in general is very low and the rudder tends to oscillate very easily, move the linkage ball on the servo horn further inwards towards the center. If, on the other hand, you have a very large amount of tail gain and the tail gyro still does not seem able to hold the tail rotor in any flight condition, move the linkage ball on the servo horn further out from the center to get a faster response speed when the gyro needs to control the rudder. 
 
Do not change the rudder rate consistency at menu point D if the tail gyro does not hold well through abrupt directional changes - the rudder rate consistency does not compensate for sudden movements! In this case, increase the gyro gain (if possible) or make use of the RevoMix feature (point F).}}

Translations:Manuals:BXFbl:Parametermenu/7/en - Revision history

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