fixed internally Engines not starting at high elevations/high temperatures

[Gunslinger52]

Hi all,

have I done anything obviously wrong?  (My engines won't start when I place the Apache on a hill in ME.)  

It is my 1st attempt to make a mission from somewhere other than an airbase or FARP.

Engine start no problem from any 'normal' starting spot.

Thanks for any help you can offer.

Have a good flight.

'52

 

No Eng Start on a hill only.trk

[Lord Vader]

Hey @Gunslinger52

Your "hilltop" is at 7000ft! It's a bit high for normal startups.

But we'll get back to you after some further analysis.

[Raptor9]

Upon further testing, it appears the starters aren't engaging when around 3500 feet in elevation or higher.

Reported. Thanks.

[Gunslinger52]

Thanks lord Vader.

Yes this was deliberate, as I wanted to show students the effects of altitude on your ability to hover.

Good luck!

[Smokin Hole]

On 8/17/2023 at 1:35 PM, Raptor9 said:

Upon further testing, it appears the starters aren't engaging when around 3500 feet in elevation or higher.

Reported. Thanks.

That explains why I couldn't cold start in the included Red Flag Day 3 (Night) mission.

[tezak]

I´m playing a mission with some friends where we are starting at Kerman (persian gulf map) on cold apaches at 5750ft, but we cannot seem to be able to start our helicopters, we tried the same mission but starting from Abu Dhabi and had no issues... so what should we do?
 

Is it possible to start the helo at all at Kerman? is there a procedure that´s not explained in the manual? 

Plz help

[Minsky]

8 minutes ago, tezak said:

Plz help

 

[Floyd1212]

The short-term solution is to change the player slots in your mission to hot-start for now.

[super_soup]

On 8/18/2023 at 3:35 AM, Raptor9 said:

Upon further testing, it appears the starters aren't engaging when around 3500 feet in elevation or higher.

Reported. Thanks.

Howdy, some mates and I have noticed that you can somewhat get around this by flicking engine start switches and then either cycling APU (turn off, count to 5, turn on) OR moving the collective.

Though, this only seems to work at/around 3500ft when starters don't engage, still doesn't help at extremely high alt. (Eg. >8000ft) without ground air supply

[HC_Official]

I hope this gets sorted out soon

[Mud]

As a workaround, you can ask the ground crew to connect air and apply air to start your engines.
Then I'm able to fire up my engines at least at Tonapah Nevada.

Br,

Mud

[Floyd1212]

On 9/14/2023 at 4:39 AM, super_soup said:

Howdy, some mates and I have noticed that you can somewhat get around this by flicking engine start switches and then either cycling APU (turn off, count to 5, turn on) OR moving the collective.

Thanks for this tip! Worked great.

When ground air is not available (like at a FARP):

1. Turn on the APU and wait for instruments to come to life
2. Flip both engine start switches forward (nothing happens)
3. Turn the APU off, wait 5 seconds, and turn the APU back on

When the instruments come back to life the engines start spinning up and Ng starts to rise.  Continue startup from here as usual.

[Lord Vader]

We hope to have this inconvenience addressed soon. Stay tuned for future updates.

[Drangoll]

Il 16/9/2023 at 16:03, Floyd1212 ha scritto:

Thanks for this tip! Worked great.

When ground air is not available (like at a FARP):

1. Turn on the APU and wait for instruments to come to life
2. Flip both engine start switches forward (nothing happens)
3. Turn the APU off, wait 5 seconds, and turn the APU back on

When the instruments come back to life the engines start spinning up and Ng starts to rise.  Continue startup from here as usual.

I've tried this but unfortunately it doesn't work for me
Ngs remain at 0
(workaround tried at 6220 feet)

Edited September 23, 2023 by Drangoll

[Floyd1212]

Yeah, I meant to come back in here and update.

I did run into a situation where waiting 5 seconds seems to have been too long, and a shorter delay of like 1 second did work.

I’m not sure what’s happening under the hood, but maybe waiting 5 seconds allows the APU to spool down too much and you don’t maintain the air pressure needed for more extreme conditions.

[IndyNavy]

On 9/18/2023 at 7:57 AM, Lord Vader said:

We hope to have this inconvenience addressed soon. Stay tuned for future updates.

Looking forward to this @Lord Vader! 

[thechaps16]

Hi, same problem for me. 5000 ft AMSL, and no start-up.

[Maduce]

Same no start above 5K

[Mivina]

Closer to 3200

[Lord Vader]

Hi again

Thank you all for your patience. We're still trying to tackle this internally. 

[Freelancer]

It seems to be a realistic issue, cause there is not enugh air pressure up there. So that the compressor of the APU cannot give enough power. But hot start works. Otherwise ground crew suply could help.

Edited November 13, 2023 by Freelancer

[bradmick]

It’s a bug. The apu and engines have no issues starting at higher altitudes in the real aircraft, this is a dcs-ism.