Thread: Speed Holes for MPG?
View Single Post
Old 07-25-2014, 01:30 PM   #78 (permalink)
freebeard
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,707
Thanks: 8,147
Thanked 8,925 Times in 7,368 Posts
Parachutes have a hole for structural integrity. Fan-inflatable structures (bouncy castles are a likely example) have an exit flap so the air moves through them.
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
aerohead (07-26-2014)