In brownout conditions, the concentration of sand and dust is extremely high. Is it likely to ‘saturate’ the Centrisep EAPS, thus reducing its efficiency?
No. Pall has tested the Centrisep EAPS with dust concentrations of up to five grams per cubic meter of air, proving that the efficiency remains constant. (Such a high dust concentration simply does not exist in real helicopter operation). During desert operations in Namibia, dust concentrations of up to 2.5 grams per cubic meter of air have been recorded, but this was with a Puma helicopter, hovering in ground effect, for twenty minutes! So the Centrisep EAPS remains fully operational in these extreme conditions.