Noob, Post Landing Question

[RedRain]

Hi All

 

Been practising my landings.

 

Every time I apply the park brake post landing, the heli begins to move on its own accord and despite the park brake being applied and the collective fully retarded. My attempts to stable the heli are to no avail and the aircraft just becomes wildly out of controll.The pitching and rolling finally gets the better of me and eventually results in a crash. My landings are virtually text book, I just cannot work out what I am doing wrong post landing ?

 

Please help :joystick:

[Slap_Chop]

I feel your pain brother. I've only had the shark a little while now and have

encountered the same situation especially when I turn weather on. I'm

pretty sure this is not the right answer but I knock the throttle down to idle

after landing. PGDN PGDN. There ya go !!!

[Birddog1]

I had the same issues at first.

I solved it by clearing the trim once i touched down and set the wheel brake.

don't know if this is correct procedure, but it didn't yaw out of control.

[jacksos101]

Yeah, definitely reset trim, and if you're still rolling around, perhaps reduce rotor rpm with that toggle switch on the collective. I don't know if that would make much difference though...

[ShuRugal]

my post landing procedure for rolling touchdowns:

 

1: dump collective

2: forward pressure on stick and simultaneously reset trim.

3: apply brakes

4: gradually reduce forward pressure as rolling speed drops

5: trim for taxi and release brakes

6: taxi to parking area

7: reset trim, set parking brake, begin shutdown procedure.

 

 

also, it is vitally important that any maneuvering involving the ground be performed with the flight director mode engaged, otherwise the autopilot will attempt to perform course corrections, and if you are at speed while this happens, may result in dynamic rollover if the AP attempts to bank the helicopter.

[roob]

I usually apply trim while holding my stick backwards, decreasing the collective... Forward pressure + trim makes the heli wanna move. But do whatever works for you.

[mmaruda]

I just turn the stick position display on (ctrl+enter), hold down the parking brake (the manual hold is stronger than the engage/disengage thing), move the stick and rudder pedal so that the display shows centred and trim.

[RedRain]

Thanks Guys

 

All great advice.

 

A little trial error and a bit more practice me thinks ?

 

Time for a fly & try your suggestions, keep you posted.

 

Cheers

[ShuRugal]

I usually apply trim while holding my stick backwards, decreasing the collective... Forward pressure + trim makes the heli wanna move. But do whatever works for you.

 

manually de-trimming works as well. if you are using a FF stick, this is probably the best thing to do. I use trim-reset command then hold forward to keep nose from snapping up until forward roll is slow enough to prevent this. if not using a FF stick (in which case the stick will always match the position of the input) then resetting trim is needed to make sure there is no lateral cyclic trim and no rudder trim, both of which tend to be problematic on the ground.

[Yurgon]

A little trial error and a bit more practice me thinks ?

 

Time for a fly & try your suggestions, keep you posted.

 

If the problem persists, post a track (preferably a short one :music_whistling:) so we can have a look.

[Ich666]

Definitely take care of resetting the trim once youre in your parking position. Also the parking brake can be quite tricky to apply, as you have to hold down the brake before you apply it or else you will experience having not enough pressure on the brakes to hold the helicopter.

[Daniel M]

My two cents, I'm a press and hold trimmer, so i'll land while holding the trim button down, brakes only as needed, but usually just joystick input until everything has settled. After i'm at a stop i'll release trim and good to go(or apply parking break/shutdown). I've had issues with resetting trim after touchdown, she always seems to want to move after I do that. So I don't reset :D

[Zolitnitsky]

I don't trim much at all (which is just me never learned to trust the thingy) so I usually don't encounter any problem with the parking break. However, having assigned the rocker with a modifier on my HOTAS to the wheel-break I, in the beginning, used that one instead as it when pressed and released (modifier) had the same effect – the break locked in position. Could perhaps be worth I try, I don't know (?) :thumbup:..

 

Otherwise I just keep the break on permanently (doing mostly steep landings), except for any eventual need of a autorotation (and sometimes taxing of course).

Edited May 30, 2012 by Zolitnitsky

[TurboHog]

Use flight director for maximum authority while retaining stability control for the selected AP channels. Effect is the same as holding trimmer but you don't have to land with your hand in an awkward position.

[Kenta]

Effect is the same as holding trimmer but you don't have to land with your hand in an awkward position.

 

It's not exactly the same, trim is still in effect (if you have the helicopter trimmed).

[TurboHog]

It's not exactly the same, trim is still in effect (if you have the helicopter trimmed).

 

Effect (handling) is the same.

 

Technically it is different, I agree.

[Daniel M]

Effect (handling) is the same.

 

Technically it is different, I agree.

 

How's abouts "percentage of input from pilot" is the same?

 

I felt left out:joystick:

[TurboHog]

How's abouts "percentage of input from pilot" is the same?

 

I felt left out:joystick:

 

The same.