need track replay Chinook cold weather issues?

Brigantine · March 13

Have been recently flying on a map that is simming wintertime. After about 20-30mins of flying in the Hook turbine power begins to fluctuate and power starts decline. Continued flight begins to show a drop in rotor speed to the point of losing generator power and flight instruments. If flight is continued however rotor speed declines to the point that takeoff is not possible. Is this an accurate modeling of the aircraft under cold weather conditions and has anyone else experienced this?

BIGNEWY · March 13

Hi,

do you have a track replay we could check? We would need more information if possible.

thank you

Brigantine · March 13

Here is track replay from one of my sorties in question. I hope this is what you are looking for.

Grayflag Caucasus Winter A-20250312-133955.trk

BIGNEWY · March 17

Hi,

the track contains user mods ( UH-60 and Herc ) which we can not use for testing purposes.

Can you do a track example with no mods?

thank you

47_Driver · March 17

On 3/12/2025 at 7:53 PM, Brigantine said:

Have been recently flying on a map that is simming wintertime. After about 20-30mins of flying in the Hook turbine power begins to fluctuate and power starts decline. Continued flight begins to show a drop in rotor speed to the point of losing generator power and flight instruments. If flight is continued however rotor speed declines to the point that takeoff is not possible. Is this an accurate modeling of the aircraft under cold weather conditions and has anyone else experienced this?

What altitude and what is the outside air temp? Extreme cold and high altitude are a recipe for Ng(N1) Limiting, which is similar to what you are experiencing.

Brigantine · March 17

Hey 47, I was flying on Grayflag Caucasus around lattice A, which pushes up the coast. my altitudes very rarely ever stray above 200 AGL and the outside temp on the particular time it occurred was -6 C (approx 20 F). It only seems to begin happening after about 20-30 mins of flight. I fly with 101st CAB if you ever want to jump into a voice chat. Discord: Brigantine.

Edited March 17 by Brigantine
type o

Butcher59 · March 19

Anti icing was already discussed in this thread, maybe it will help

comcat · April 1

I can confirm after some 30 min of flying on Caucasus winter, the RPM (N2) go down into yellow and subsequently in red.

not good,

if ice is a factor and anti icing is not implemented ( eng de-ice that is)?

fix 'er

flmike911 · April 2

The Chinook does not have a dedicated selectable engine anti-ice system. The only one like that is the windshield anti-ice. The air into the engine passes through the air inlet housing which holds the engine oil tank. The hot return oil heats the oil tank which in turn provides the "anti-icing" for the engines. I can speak from experience that after you land and are post flighting and hit your arm accidently on that oil tank, that thing is HOT. We've been in Afghanistan in January at -10 to 15 C and had zero issues with engine performance. That was also running EAPS. On the regular (non EAPS) FOD screens there are removable bypass panels on the backside of the fairings (provides reasonably large unobstructed air pathway) that need to be removed if the temp drops below a certain number. Most units have an SOP to remove them in Oct or Nov and leave them off until Mar or Apr. Sorry for the long answer, just wanting to try and be thorough with explanation.