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Packs On/Packs Off

Wed Aug 15, 2001 8:10 am

I know that the engine bleeds take bleed air from the engine (meaning less combustion, hence less power) and provide air conditioning, and anti-ice. Quite frankly, what the hell do the packs do?  Confused

Regards,
-1011 Big grin
 
NKP S2
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RE: Packs On/Packs Off

Wed Aug 15, 2001 8:46 am

... 1) Maintain a comfortable cabin temperature regardless of ambient conditions, whether on the ground at Phoenix Az on July or the sub-zero conditions at altitude ( any time of the year at any location ) -- 2) Said conditioned air also provides air to pressurize the cabin.
 
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HAWK21M
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RE: Packs On/Packs Off

Wed Aug 15, 2001 4:34 pm

Airconditioning system also called Packs are used to provide a safe & conditioned environment in the Aircraft.
The Packs in addition to supplying conditioned air, also helps in pressurization of the cabin to mantain the cabin altitude as near sea level or to that of the destination airport.

Packs are normally Electrically controlled & Pneumatically operated.

Packs on means the Air conditioning is running,Pack off means its not.

regds
HAWK.
I may not win often, but I damn well never lose!!! ;)
 
cdfmxtech
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RE: Packs On/Packs Off

Wed Aug 15, 2001 9:02 pm

Kiss my L-1011

Packs (Air Conditioning Packages) are a group of components (system) to pressurize the aircraft and provide air conditioning. Most packs work by taking engine bleed air and with the help of ram air and an air cycle machine (compressor & turbine), provide a cold air/hot air heat exchange. There are many different stages that this process takes, but it's pretty basic.
 
airplay
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RE: Packs On/Packs Off

Wed Aug 15, 2001 11:01 pm

Just a clarification,

Although the air conditioning packs control the mass flow of the air entering the aircraft interior, they do not control the pressure. The outflow valves control the pressure via commands from the pressurization controller. These 2 systems are related only in that the air conditioning packs supply the air and the outflow valves release it. They are typically separate otherwise.

Also, it is a common misconception that "air conditioning" means "cooling". This is not the case in aircraft.

"Heating" is "heating", "cooling" is "cooling" and "air conditioning" is "heating OR cooling" of air to "condition" it before entering the aircraft interior. ATA chapter 21 is called "Air Conditioning". There is no corresponding "Heating" chapter.

 Smile


 
JETPILOT
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RE: Packs On/Packs Off

Wed Aug 15, 2001 11:06 pm

The word "pack" originaly was the acronym PAC....standing for Pneumatic Air Conditioning.

JET
 
XXXX10
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Heating With Packs?

Thu Aug 16, 2001 12:29 am

If an aircraft without an auxillary power unit, needs ground air to supply cool air for the air conditioning, does the same aircraft need ground air supply for warm air?

I apologise if this is getting away from the point.
 
FBU 4EVER!
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RE: Heating With Packs?

Thu Aug 16, 2001 2:32 am

Yes.
You use an external aircondition unit to provide either cold or warm depending on your requirements.
"Luck and superstition wins all the time"!
 
JETPILOT
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RE: Packs On/Packs Off

Thu Aug 16, 2001 8:41 am

You dont need a ground A/C unit to provide cold air. You can attatch an air cart to the external air port and power the PAC's and get cold air.

JET
 
CX Flyboy
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RE: Packs On/Packs Off

Fri Aug 17, 2001 4:45 am

"Packs on...Packs off....Packs on....Packs off..."

"Yes, captain Myagi".
 
JETPILOT
Posts: 3094
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RE: Packs On/Packs Off

Fri Aug 17, 2001 9:29 am

LMAO !!!!

JET
 
CX Flyboy
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RE: Packs On/Packs Off

Fri Aug 17, 2001 4:26 pm

LMAO?
 
sabenapilot
Posts: 3700
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RE: Packs On/Packs Off

Sun Aug 19, 2001 4:53 pm

Hi there,
Just a small remark:
PACK is an abbreviation for:
Pressure and Air Conditioning Kit.

 
galaxy5
Posts: 1952
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RE: Packs On/Packs Off

Wed Aug 22, 2001 3:24 am

hopefully this illustration will help you with A/C systems

"damn, I didnt know prince could Ball like that" - Charlie Murphy
 
galaxy5
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RE: Packs On/Packs Off

Fri Aug 24, 2001 10:26 pm

?
"damn, I didnt know prince could Ball like that" - Charlie Murphy

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