In the next picture what are the items circled in red?
Photographed by Adrian Pingstone in August 2002 and released to the public domain.
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$\begingroup$ related, if not duplicate: aviation.stackexchange.com/q/16566/1467 $\endgroup$– FedericoCommented Mar 30, 2016 at 8:36
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1$\begingroup$ This is what is on the other side. Additional details: Why is air mixed with bypass air on the A/C of an aircraft? $\endgroup$– minsCommented Mar 30, 2016 at 18:49
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2 Answers
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The forward ones are a ram air inlet (NACA duct) for the Environmental conditioning System (ECS) and what looks like an antenna. The aft one is an exit louver for the ECS.
answered Mar 30, 2016 at 8:59
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$\begingroup$ @Federico You're right. I didn't see that :). Looks like an antenna. $\endgroup$ Commented Mar 30, 2016 at 9:12
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The forward inlets are air inlets for the air conditioning and pressurisation. I am not sure of the after ringed area.
