Unable to understand why I get LOW ROTOR RPM and loss of lift with 103% power in IGE facing into wind.

[DmitriKozlowsky]

Unable to understand why I get LOW ROTOR RPM and loss of lift with 103% power in IGE facing into wind. Wind is FROM 145 deg. at 5 knots.

So I establish , or try to, a control hover with nose pointed into the wind. This is the part where current AH-64D and my skill with it, or lack of it, is most chaotic. Strong oscillations in YAW and PITCH, less in ROLL. 1/2 times Bitchin Betty tells LOW ROTOR RPM, and helicopter settles, as if its in VRS. 

My control mission is Instant Action-Syria-ColdStart.

[admiki]

8 hours ago, DmitriKozlowsky said:

Unable to understand why I get LOW ROTOR RPM and loss of lift with 103% power in IGE facing into wind. Wind is FROM 145 deg. at 5 knots.

So I establish , or try to, a control hover with nose pointed into the wind. This is the part where current AH-64D and my skill with it, or lack of it, is most chaotic. Strong oscillations in YAW and PITCH, less in ROLL. 1/2 times Bitchin Betty tells LOW ROTOR RPM, and helicopter settles, as if its in VRS. 

My control mission is Instant Action-Syria-ColdStart.

Can you give us track file?

My guess is that you are just overweight for conditions. Apache is not overpowered like Hind, so getting into hover from forward flight can be tricky.

[DmitriKozlowsky]

Its the Instant Action-Syria-ColdStart. mission. Loadout is as default. 50% fuel, 2 X rocket, and 2 X (2 Hellfire).

After start up with throttle at Flight . Taxi aircraft to 145 deg. heading. Met. is Wind FROM 145 and 5 knots, 29.92. Standard day. 

I find it odd that AH-64D is harder to hover and control in IGE, then it is in OGE. Once I enter into IGE slow flight to however, the oscillations in YAW, and ROLL increase dramatically. The slip indicator ball just dances from side to side.

[Floyd1212]

The only time I get LOW ROTOR RPM is when I add collective too fast.  You can run at 103% torque all day if you get there gradually.

If you add too much pitch to the blades all at once, it puts too much drag on the rotor system and the RPM drops.

Can you pick the helo up off the wheels right there on the runway and stay in IGE hover without issue?

[Floyd1212]

I just started the mission and after getting it off the ground I came around to the back side of the airport to an IGE hover at 25ft with 73% torque.

If you can post a video or track file, we might be able to help troubleshoot better.

[Blind]

Have same problem...the gross weight seems to be stuck on 18K.....even after reloading. A wee bit too heavy...

[DmitriKozlowsky]

Is there a reason why DCS: Helicopters including 3rd party Gazelle don't have good autorotation training missions. 

[Sarge55]

Yes

[Blind]

Found!! Your throttles ate not EXACTLY in the ''FLY" position...adjust the throttle axes..Goodluck!

[TrevorMcNeill]

Engines can only supply so much power/torque on certain days and 103% may be that max for the given day. Any more collective input past that will result in low rotor(rotor droop) as engines are not capable of keeping the rotors rpm within limits at the given rotor pitch.