Auto Hold Advice Needed Pls

[Tumbleweed]

Hi,

 

I added the BS2 to my collection last Thursday and am getting quite familiar with it. Just have one question regarding the auto hold features...

 

When all of the pitch, bank, heading and alt holds are enabled I make adjustments using the stick in conjuction with the trim button and the brake however no matter how careful I am to keep the aircraft level, when I set the trim the aircraft ends up at some squiffy bank angles. Not quite sure what I'm doing wrong.

 

For instance, I get the aircraft flying on auto in one direction (heading) at my desired alt and speed and then I wish to turn the aircraft a few degrees left or right so I yaw the aircraft with the rudder (torque) and at this point I've tried holding trim while I yaw as well as yawing then pressing trim but still, no matter how level I've kept the yaw turn, the aircraft ends up at some canked angle. Sometimes it flies on the heading I want at this banked angle. Some times it is still turning when I set the trim.

 

Any ideas please? :joystick:

[Isegrim]

Just for my better knowledge of like you fly the Shark one question.

Are you using the central position trim mode?

 

In the other Hand you can just upload a TRACK (.trk file).

 

Also .... yaw only turn + Shark....... are not the best friends at higher speeds (150 km/h+) .

[Flagrum]

Hi,

 

I added the BS2 to my collection last Thursday and am getting quite familiar with it. Just have one question regarding the auto hold features...

 

When all of the pitch, bank, heading and alt holds are enabled I make adjustments using the stick in conjuction with the trim button and the brake however no matter how careful I am to keep the aircraft level, when I set the trim the aircraft ends up at some squiffy bank angles. Not quite sure what I'm doing wrong.

 

For instance, I get the aircraft flying on auto in one direction (heading) at my desired alt and speed and then I wish to turn the aircraft a few degrees left or right so I yaw the aircraft with the rudder (torque) and at this point I've tried holding trim while I yaw as well as yawing then pressing trim but still, no matter how level I've kept the yaw turn, the aircraft ends up at some canked angle. Sometimes it flies on the heading I want at this banked angle. Some times it is still turning when I set the trim.

 

Any ideas please? :joystick:

Sounds to me as if you are trying to change your heading while Route Mode is enabled. In this case, the system acts as real auto pilot and tries to fly you to the next waypoint. If you then try to change your flight path, the AP sees this deviation from the flight path and "corrects" it.

 

To tell the AP to fly to where YOU want, you need to disable the Route Mode. Then the AP tries to fly the helo to where (i.e. heading) you trimmed it.

 

Route Mode switch is located at the collective.

 

edit:

Route Mode=on tries to fly you to the "desired point". This is usually the active steerpoint of your PVI-800 nav system. But it can also be the point where your Shkval is pointing to if you enable "Turn To Target" mode.

Edited August 25, 2014 by Flagrum

[Tumbleweed]

Sounds to me as if you are trying to change your heading while Route Mode is enabled. In this case, the system acts as real auto pilot and tries to fly you to the next waypoint. If you then try to change your flight path, the AP sees this deviation from the flight path and "corrects" it.

 

To tell the AP to fly to where YOU want, you need to disable the Route Mode. Then the AP tries to fly the helo to where (i.e. heading) you trimmed it.

 

Route Mode switch is located at the collective.

 

edit:

Route Mode=on tries to fly you to the "desired point". This is usually the active steerpoint of your PVI-800 nav system. But it can also be the point where your Shkval is pointing to if you enable "Turn To Target" mode.

 

 

That seems to have done the trick. Thanks Flagrum :thumbup:

[anjet]

Could it be the case that you try this straight after start-up and takeoff.

IIRC there is some period of time where some equipment (Doppler something :) ) responsible for this attitude determination needs to warm up.

Edited September 8, 2014 by anjet
didn't see the other post wit answer

[anjet]

I just saw you got your answer from Flagrum :)

[BitMaster]

anjet, you are still right with what you said.

 

You can lift off and use the AP channels right away BUT I would wait some 2 minutes or so until I engage HoverMode.... if you do it too early the rodeo lights start flashing YIHAAA.

 

Isn't it the inertia system needing to calibrate ? I dunno what exact system causes it but you better obey it ;)

 

Bit

[Fishbreath]

Once you have ground speed or the under-50-kmh velocity vector in the HUD, you're good to go for auto hover.