Ventilation - Blowing off your Beanie
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- Опубліковано 12 вер 2024
- Making a comeback after editing.
FCOM images replaces by board briefs and a 'not so steady hand'!
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Great video explaining a system I have never fully grasped. You have a gift for making complex systems seem simple. Thanks for your efforts! 🤟
Glad it was helpful!
It helps if you understand what the Airbus design team were trying to achieve. 1980s tech produced a lot of heat that had to be kept within a narrow temperature band to function properly. They were desperate to ensure that it would function correctly within the large temperature range experienced by operators around the world. This is why the system is phenomenally over -engineered.
Thanks for your insight and for sharing 👍
Many thanks, definitely much easier to understand the various configs this way rather than trying to read it in the FCOM. I do find the naming of the valves a little counter-intuitive though. In the diagrams it looks more like the Skin Exch Outlet Bypass Valve lets air "IN" from the AVNCS Bay and the Skin Exch Inlet Bypass Valve lets air "OUT" through the cargo bay. Have I misunderstood their function? Cheers.
Yes the Naming of the valves is a little odd and you are correct in that warm air from the Avionics bay is drawn IN and OUT through the Cargo bay. Im guessing something got lost in the French Translation! I have tried to clear this up however with the directional arrows showing the flow as I think I may have said in from the Cargo bay.
Hope this helps and thanks for commenting
@@airbuswhatsitdoingnow320 Great. For sure not the first time some "Franglais" has mudded the waters. Just glad to know that I understood it correctly and yes for sure your arrows and explanation made it clear. Many thanks.
Hi thanks for the video mate, really useful. I had a question about the smoke configuration. What happens if we have smoke detected in the avionic's bay? Would the skin exchange outlet bypass valve open up automatically? The smoke config diagram from the FCOM just assumes that smoke is coming from the avionics equipment...
The skin Exch Valves are open in the closed and intermediate configs to allow warm air from the AVNCS bay to flow to the cargo under floor
Either of the Blower/Extract fans PB will put the system into closed config.
Pressing both does the same but vents overboard.
In both cases the Skin valves close but not automatically i dont believe.
Hope that helps
@@airbuswhatsitdoingnow320 thank you very much that clears it up! Sorry may i ask another question, probably a stupid question but worth asking! In open-circuit config it says in the fcom "the open-cicuit config operates when skin temp is above the on-ground threshold." So will the open-circuit config operate for example when the skin temp is 13 degrees (and increasing), and not at 10 degrees. If it was at 10 degrees on the ground would it be in close-circuit config? On the ground,would the config only be in closed if the skin temp was between 12-9 degrees and if the skin temp stayed the same (no increase or decrease). Many thanks for reading!