Multiplex WINGSTABI EASY Control RX-7-DR und Extra 330 SC

[max_z]

That's the clever bit, the Wingstabi works out what the best gain setting is in flight.

Since we are discussing this, can I go into that a bit more. I tried the WST-EC out with my trusty Royal Pro/SX, with full range settings for the channels as instructed in the manual. But when it came to setting the WST to the ranges already set on my friend's Cockpit for an existing model, the WST would not accept these ranges, and we had to set those to max (or thereabouts) to get it to work. Now, how can the WST determine the correct gains when you reset the ranges to actual flying setup after teach-in? I am guessing the answer is you should set up your model mechanically to get your servo travel close to maximum (which is best practise anyway), or indeed use a slider to set the sensitivity.

Gruss,
Max.

@peter.ahls Entschuldige für "hijacking" dein Thema

[FrankS]

I am not an expert on this, but this what I have observed via the telemetry, in gyro mode the gain is at the maximum when the control (aileron, elevator, rudder) is centered and decreases as the control input increases. The Wingstabi seems to adjust the max gain in flight, I'm guessing by feedback from the models behavior.

Yes it's best to set the model up mechanically first, with or without gyros!, but on your friends model I would use dual rates to reduce the control throw if you want to make the model less responsive. Reducing the gain on a slider would only seem to affect the dampening when the controls are in the neutral position.

[profimc]

Hi, Frank!

It is true that a WST does not replace dualrate or exop settings. It might seem sometimes that the WST limits the control throw but it is not so. The WST - when in dampening oder headingmode - try to work aganist the control positions especially on the workbench. In flight things are different. So you advice to use dual rates is helpful. I personally prefer expo. At the beginning of my flying-career I tended to use D/R but nowadays I do programm D/R and expo but seldom really use D/R. You kind of have to become used to expo.

w/r
profimc

[max_z]

My point was that, when you have to "teach" the WST-EC on high travel rates, the WST will set the gains to those travels and saves those. When you then reduce those travel settings in your transmitter, irrespective of how you achieve this, with the servo travel or dual rate settings, the WST still retains the saved stabilisation gains and may overcompensate as a result. Hence my suggestion to reduce those gains with the sensitivity channel on your Tx in that case.
Unless of course Frank is right in his assumption that the WST is "smart", and adjusts the gains as a result of your flying behaviour.

And as Frank stated correctly, the gains are highest at neutral control input, and reduce to zero at full deflection (I tested that on the bench). So they will not reduce to zero when you are flying with your D/R set to low rate, and will still compensate even when you have full stick deflection! I guess this may feel as "sloggish" behaviour, since the WST is fighting your control input. Remember that the WST has no way of knowing how your control input is put together from servo travel settings, dual rate or expo, all it is seeing is a channel output value.

Max.

[profimc]

Hi!

There is an obvious difference between the rates set in the TX and what the WST does when it is necessary. I have always expected the servosettings in the TX are the maximum the WST can make - regardless whether by the controls or the compensation. But I might be wrong in that, I haven't tested that so far.

On the other hand it seems quite clear that the WST overrides the TX-settings or options (D/R) when necessary because there the WST develops his own life which is independent of the TX only inhibited by the senitivity gains respectively the switch. Of course, when switched off (OFF-Mode) the gyro does not work at all.

As I understand it, the gains work like some kind of gates. The more you shift the slider to one end the more you open these gates and the less the gyro is inhibited. So the middle can be seen as the hightes level of inhibition.

w/r
profimc