Tail Lag

[Mick H]

My Blade5003d has a lag in the tail, when hovering,on increasing power the tail kicks to the right momenterily,(I assume due to the torque of the main blades) is this normal or can it be eliminated via the transmitter settings. I am using a DX8. I do not think there any mechanical issues.

Mick H.

[tomatwalden]

What tail gain are you running ?

[KevDavies]

When you say increasing power, do you mean hitting idle up?? If so then you will get a small bit yeah. If you have a top end gyro you can dial it out. But if its as I expect youve nothing to worry about.

My Trex 450 will do it if I go from normal mode to idle up. Doesnt affect flight

[tomatwalden]

Ok, the Blade 500 3D has a fairly simple gyro unit - the G210HL - the only way you can affect its behaviour really is via gyro gain in your transmitter.

Essentially, anything that increases torque in the main rotor system (increase of power, or increase of pitch) will cause the tail to want to spin the other way (every action has an equal and opposite reaction). The tail gyro senses that movement and compensates maintaining the heading hold. How quickly the gyro senses the unwanted movement is defined by the tail gain - increase the gain and the tail will hold better in movements like this. However, if the gain is TOO high, you'll end up with a high speed wag on the tail whereby the frequency of yaw sensing is just too high.

So, increase the gain slowly (say 2% at a time) until the tail starts to wag. Then turn it down a notch or two. That should give you the best setting you can get.

Beyond that, you would need to look at putting a better gyro in the heli. But, on the assumption that you're not doing major aerobatics, and that the "kick" isn't too bad (eg. a few degrees is OK, 90 degrees is bad), you're better off just living with it.

[Dan22]

As Tom says, increase the gain to get a better holding, also have you set up the tail in rate mode first to make sure it doesn't drift to the left it right?
My Trex 500 used to do the same when I spooled up. I had to mechanically set some more right offset by adjusting the length of the tail pushrod to counteract the torque from of the main blades
Then you will need to redo the end points on the gyro.
Hope this helps

Dan

[Mick H]

Gyro gain is set at 70%, so I will do as you suggest (increase by 2% at a time)

[Mick H]

It occurs when hovering and just increasing power, it is only a few degrees, but as you say it does not affect flight. The gyro is set on 70%, so I will try increasing bit at a time.