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freebeard · 06-24-2015, 03:03 AM

Engine exhaust is corrosive. And the added back-pressure would harm engine performance.

A double-walled envelope (like a U-shaped air mattress) would need less air volume, and could be inflated, as aerohead suggests with an auxiliary fan.

06-24-2015, 03:03 AM	#78 (permalink)
freebeard Master EcoModder Join Date: Aug 2012 Location: northwest of normal Posts: 28,500 Thanks: 8,060 Thanked 8,863 Times in 7,316 Posts	Engine exhaust is corrosive. And the added back-pressure would harm engine performance. A double-walled envelope (like a U-shaped air mattress) would need less air volume, and could be inflated, as aerohead suggests with an auxiliary fan.