pitch stability problem

[Dave317]

I was playing one of the campaign missions today, the one at night where you need to evacuate wounded from a convoy that had been attacked. Once the heli was loaded I tried taking off vertically but it was far too heavy. I eventually got in the air by running along the road to get some transitional lift but I must have pulled to much pitch as the stability system switched off. I got it switched back on again but every couple of minutes the heli would pitch up and id have to use some forward sick to get it level again. Any reason for this? All other channels worked as normal apart from pitch.

[HellToupee]

I think ive had this issue to caused after a hard landing then repair nothing looked wrong but it was barely controlable.

[Scrim]

The autopilot isn't all straight forward, and the lack of a manual doesn't help. I was informed by someone that exceeding 250 kph would cause this instability, and it seems true.

[Rogue Trooper]

perhaps a bug, perhaps it is correctly modeled. Control of the nose and holding a constant nose down attitude is all that counts once the pitch AP disengages, if you relax nose control for a split second the magnificent 8 will bite your ass.

 

I used to think wheels on a chopper did not look right but after this mission I now believe a proper chopper MUST have wheels.... Wheels are just more useful!

 

I set the engine power thing (I hate not having a manual), left of the collective, to max engine power output.

Then I rolled down the road and into the air sweet and clean..... supreme chopper.

[1.JaVA_Platypus]

I've found that if you turn on too much electrical systems, like all the anti-ice and dust protection stuff, it draws too much power from the engines. So I like to have them switched off unless I really do need it AND when I am in full flight. It can also mess up your landings. In this particular mission, you can also switch off all of the circuit breakers on the pilot's side. They control weapons and you don't really need that in this mission.

 

On the autopilot, violent maneuvers and High-G seems to switch it off. Like a bouncy landing at night. When you switch it on, you sometimes see some of the dials on the autopilot spinning. I reset the trim and wait for the dials to settle down before taking off.

 

Of course, sometimes this doesn't work all of the time. But I hope I am helpful.

[terence44]

Thanks to you for your answer, I also looked for a solution for this problem.

 

You think that " Stb generator " also raises problems ? :

 

[Rogue Trooper]

is the stand by generator in the off position as standard?

[Rogue Trooper]

should it be on to give back up to main power source?

[1.JaVA_Platypus]

This should be an electrical power generator and it will draw energy away from the engines. (and you need that for flying around) In theory.

[Cibit]

IIRC the standby generator is a back up for the main generators.

With regard the switching off of stability aids in flight, it is generally caused (According to an earlier discussion) by to much collective and otherwise other unsympathetic use of the flight controls.

Again as previously posted until the manual is released we are making assumptions which may be wrong.

Pretty sure though that the instability issues are pilot error (no offence intended OP) and not a bug:)

[Dave317]

I've done a bit of testing today. It seems that if the stability system gets switched off in flight you need to be on level ground before you switch it back on again otherwise it will be set at whatever attitude you are at when it's switched back on. Not sure if this is what happens with the real thing or not.

[Cibit]

Just to make sure, your talking about the pitch and yaw channel (middle button of centre console) and not the altitude or heading channel

[Dave317]

Yes the centre channel. The one that doesn't have an off button.

[Cibit]

Only thing I can suggest is try to make all inputs smooth and incremental. Avoid heavy landings and keep practicing:)

This mad up and down used to happen a lot to me but as I get more expeirienced it never shows itself:)

 

Best of luck:thumbup:

[Dave317]

I'm not sure if you are quite understanding what is going on here. I can fly the mi8 just fine, the trouble comes when you try and lift a lot of weight and the generators cut out which in turn shuts off the stability system. You can switch the stability back on but the pitch channel isn't right unless you turn it back on when the heli is completely level. Do you need to be level in the real thing?

[Cibit]

Dave can you post the mission and I will try to replicate it. or post a track I can take control of. See if we can sort it:)

[Dave317]

It's very easy to replicate. While flying turn the main autopilot breaker of and then on again. Then switch the pitch/roll channel back on and see how it handles.

[Cibit]

Hi I think we are at cross purposes, I know what its like to fly without the pitch yaw channel on. You stated it happened when you loaded up a full complement of troops and tried to lift off. This does not happen to me so if you posted a .trk I could try with the weather settings you have in the mission your talking about. If your doing it at 40C and I try at 20C I will have a different flight to you. Please dont think I am alluding to your piloting skills I am merely attempting to help

[1.JaVA_Platypus]

I think the engines need to have at least 88%RPM for the generators to be effective. A sudden request for power lowers the engines RPM below that figure and the autopilot (among other systems probably) cuts out. It does not engage automatically after the RPM goes above 88% again.