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Altitude and performance


Zimmerdylan

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I have been flying the P-51 from day one. I'm not a technical geek, nor do I spend 20 hours a week in a virtual cockpit. I just enjoy flying. And over the course of the years that I have been with DCS, I've picked up a lot of information and learned a lot about flying. Not nearly as much as I have seen others here but I get a little better every time I fly.

My question is: I know that the P-51 has different performance standards at different altitudes. So when I am climbing, or even fighting between 15-18,000 feet. I have noticed that the plane itself does not perform all that well. My manifiold pressure can get a little hard to maintain and the plane does not react as it should to power settings. At some point, I'll hit a magic altitude and everything goes right back to normal and the plane acts great. What is the cause of this? And......how did pilots make up for this when fighting. The enemy must have known that this was a limitation of the P-51 and taken advantage of it.

I try to avoid that space when I'm fighting. But I always inevitably end up there at some point during a fight.

I'm not ace material by any means. But I manage to kill more often than not. But I do so by just barely managing, and flying by the seat of my pants at times. And I dread when I get dragged into that altitude bracket because it makes everything that much harder to manage.

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Yes. it has to do with the supercharger.

But there is not possibility to override its automatic, you only can test to switch it to second speed on ground (for test) but you can switch off 2nd speed a fly only with 1st (no reason for it).

Critical altitude is not alt. where the supercharger is switched to 2nd speed, it is altitude where the supercharger still (last) supply engine with maximal manifold pressure, above this altitude manifold pressure is going down (means engine power).

And the supercharger is switched up around 16000 feet (depends on plane`s speed, map. seting..), so if you fly bellow this altitude engine will not perform with maximal power (you are above critical altitude for 1st speed) and you will get it after you reach "magic" altitude when supercharger is switched to 2nd speed and engine works with maximal power again.

F-15E | F-14A/B

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it should be manual

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it should be manual

not it should not

only automatic or manualy 1st, pilot can not permanently switch the supercharger to 2nd speed and decide when he do it, only automatic

from manual...

Capture.PNG.9054f632ef63bae048526ace722bfbea.PNG

F-15E | F-14A/B

P-51D | P-47D | Mosquito FB Mk VI |Spitfire | Fw 190D | Fw 190A | Bf 109K |  WWII Assets Pack

Normandy 2 | The Channel | Sinai | Syria | PG | NTTR | South Atlantic 

F/A-18 | F-86 | F-16C | A-10C | FC-3 | CA | SC |

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Yel only automatic and IRL knowledge of enemy planes was acquired mostly via fighting them and its really hard to see that the enemy plane is having lower engine performance right bellow 15000ft.

 

So I doubt many Axis pilots saw that difference. Its not something obvious like early spitfire's choking due to carburator overflooding during negative G maneuvers.


Edited by Solty

[sIGPIC][/sIGPIC]In 21st century there is only war and ponies.

 

My experience: Jane's attack squadron, IL2 for couple of years, War Thunder and DCS.

My channel:

https://www.youtube.com/channel/UCyAXX9rAX_Sqdc0IKJuv6dA

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