problem with oxygen consumption in P47

[PETER SHIFTY]

Hello, I'd like to ask if you have the same experience. With the P47, when I turn on the oxygen after takeoff, it lasts max. 20 minutes maybe less. Then, according to gauge, the oxygen has run out, the warning light is on and the oxygen indicator is not moving. Is it a bug, or am I operating oxygen badly?
I set it at normal after start. Or must the quantity be set before takeoff? Thanks for the information. As is the case with P47 or P51, Spitfire.

 

thanks EAGLE-Shifter

Edited March 3, 2021 by PETER SHIFTY

[BIGNEWY]

Hi

 

oxygen pressure readings can drop as altitude increases due to the cooling of the oxygen tanks. Conversely, the pressure can increase as altitude decreases due to the warming of the tanks.

 

from page 100 in the manual 

Oxygen regulator The AN6004 oxygen regulator is installed on the right side of the cockpit, just aft of the instrument panel. The oxygen regulator has a diaphragm which actuates a valve, permitting oxygen to flow through the regulator, where it mixes with free air in varying amount in accordance with barometric pressure. A control valve allows the pilot to close the air intake, thus causing pure oxygen to flow to the mask. The regulator also has an emergency valve, which causes oxygen to bypass the regulator and flow directly to the mask. A feed line directs oxygen to the Oxygen Flow Blinker indicator to show when the regulator is functioning. Figure 80. Oxygen regulator Diluter lever. The Diluter lever is located on the side of the regulator case and may be positioned to NORMAL OXYGEN or 100% OXYGEN. The Diluter lever manually operates the air shutoff valve, allowing the regulator to deliver pure oxygen when the lever is in the 100% OXYGEN position. During normal operations, the Diluter lever should be left in the NORMAL OXYGEN position to allow air and oxygen to mix in the proper proportions for any given altitude. Emergency valve. The regulator has an independent oxygen emergency valve. When the valve is turned counter-clockwise, a continuous stream of oxygen is allowed to by-pass the regulator and flow to the mask.

 

Do you have a track replay showing the issues? 

[PL_Harpoon]

What do you mean by " I turn on the oxygen after takeoff"?

Do you turn the red emergency valve?

 

In normal operation the regulator mixes air from the outside with the oxygen supplied by the air bottles. If you turn the red valve the air from the bottles bypasses the regulator and flows straight into the mask - which means it will get used significantly faster than normally.

 

For normal operation, just leave the dillutor at Normal Operation and the emergency valve off.

[PETER SHIFTY]

On 3/3/2021 at 3:06 PM, PL_Harpoon said:

What do you mean by " I turn on the oxygen after takeoff"?

Do you turn the red emergency valve?

 

In normal operation the regulator mixes air from the outside with the oxygen supplied by the air bottles. If you turn the red valve the air from the bottles bypasses the regulator and flows straight into the mask - which means it will get used significantly faster than normally.

 

For normal operation, just leave the dillutor at Normal Operation and the emergency valve off.

Thanks, yes yes I turned the red valve, just switch to normal only? In normal flight.

On 3/3/2021 at 3:04 PM, BIGNEWY said:

Hi

 

oxygen pressure readings can drop as altitude increases due to the cooling of the oxygen tanks. Conversely, the pressure can increase as altitude decreases due to the warming of the tanks.

 

from page 100 in the manual 

Oxygen regulator The AN6004 oxygen regulator is installed on the right side of the cockpit, just aft of the instrument panel. The oxygen regulator has a diaphragm which actuates a valve, permitting oxygen to flow through the regulator, where it mixes with free air in varying amount in accordance with barometric pressure. A control valve allows the pilot to close the air intake, thus causing pure oxygen to flow to the mask. The regulator also has an emergency valve, which causes oxygen to bypass the regulator and flow directly to the mask. A feed line directs oxygen to the Oxygen Flow Blinker indicator to show when the regulator is functioning. Figure 80. Oxygen regulator Diluter lever. The Diluter lever is located on the side of the regulator case and may be positioned to NORMAL OXYGEN or 100% OXYGEN. The Diluter lever manually operates the air shutoff valve, allowing the regulator to deliver pure oxygen when the lever is in the 100% OXYGEN position. During normal operations, the Diluter lever should be left in the NORMAL OXYGEN position to allow air and oxygen to mix in the proper proportions for any given altitude. Emergency valve. The regulator has an independent oxygen emergency valve. When the valve is turned counter-clockwise, a continuous stream of oxygen is allowed to by-pass the regulator and flow to the mask.

 

Do you have a track replay showing the issues? 

 

Thank you. i read the manual carefully again, i cant well english, sorry. 

[PETER SHIFTY]

then, i was running 100% oxygen (emergency) directly into the mask right after takeoff. Is it the case that the oxygen regulator turns normal after takeoff?

[PL_Harpoon]

You don't need to do anything with oxygen regulator. It is set to normal operation by default.

[grafspee]

21 minutes ago, PL_Harpoon said:

You don't need to do anything with oxygen regulator. It is set to normal operation by default.

I will add that same thing apply to spitfire and P-51 as well.