> Presumably bleed air from the jet engine compressor It appears to come from an auxiliary power unit. https://youtu.be/G_jhcqGjUww?t=43 https://youtu.be/G_jh

> Presumably bleed air from the jet engine compressor It appears to come from an auxiliary power unit. https://youtu.be/G_jhcqGjUww?t=43 https://youtu.be/G_jhcqGjUww?t=43