Thread: Coaxial Helicopter
View Single Post
Old 09-11-2016, 11:39 PM   #10 (permalink)
freebeard
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,698
Thanks: 8,144
Thanked 8,925 Times in 7,368 Posts
Pop Sci: Solo for Hot Air
  Reply With Quote