Failsafe situations...

[mattie-lodge]

Hi Guys,

As you may know the Vbar Blueline V5 acts as a receiver as well. So, when I came to set the failsafe on it I found it's defaults were to centre all flight controls (alieron,elevator and pitch) and zero throttle (or where ever you leave the throttle channel at during the bind process).

The discussion I'm having on the vstabi forum.....Do you think this correct or not?

Personally I feel the flight controls should be held in there last know position and only the throttle should be zeroed. If for instance you are flying with pitch on, maybe a bit of roll and the model goes into failsafe, using the zeroing flight controls method the model will un-expectedly change it's path that it was following surprizing the pilot and confusing him as to what evasive action to take. If you held the controls it would have far less impact on what would happen to the models path and makes it easier to avoid the out of control machine. Both these situations we accept that the throttle should go to zero.

What do you all reckon??

[Tim Procter]

Personally I feel the flight controls should be held in there last know position and only the throttle should be zeroed.

Agreed.

[Tom Burgess]

Agreed.

+1

At least that way you know which way it is heading

[StreetDragster]

I also agree that hold last position and engine to idle is the ideal failsafe for heli's.

Matt

[Paulice]

It's a very difficult one to call.
What is perfect in one situation is completely wrong in another.
I've read through the topic on V-bar forum as well, and there are very good points, but still i stick with the above.

[Rotorhead]

There is merit to the centre the controls option, that is also predictable, more so than a model that is spiraling down to the ground IMO.

Once its gone into failsafe (which is a misleading concept) then with centred controls on a well trimmed model it should track in a straight line while its falling or at least not be turning at varying and random rates as its falling.

If we consider the case of a plane for simplicity if the pilot banks the plane and it then locks out with the aileron still uncentred then its going to to continue to roll, making it hard to predict where it would end up.

With the failsafe set to centre the controls it would stop rolling, establish a turn and the nose would drop, this makes where it will end up more predictable IMO, but if its still rolling because aileron is held in then its direction is a lot less predictable as it would first be banked one way while upright, then the other way while inverted, making turns one way then the other.... not to mention the other controls like elevator messing it up.

[barney]

Throttle to idle, Hold last good command is the best option as in the vast majority of cases control is regained in very short order. The last thing you want is sudden flight path deviation.

Helis are not exactly Gliders anyways

[dav20043]

when the throttle is off the helli will soon become a house brick either way so the controls moving to neutral would only have an effect on the instant it happened .At least with hold position it would be little more of a gradual effect giving you opportunity to swear and demonstrate to the bystanders the controls are no longer responding