PPRuNe Forums - View Single Post - Blade pitch stall margin
View Single Post
Old 4th Sep 2003, 14:01
  #2 (permalink)  
Dave_Jackson
 
Join Date: Apr 2003
Location: Vancouver, BC, Canada
Posts: 1,635
Using Prouty's calculations, the Robinson R22 Beta would have a collective (root) pitch of 14.5-degrees in hover at GW, if it used a 0012 airfoil. It actually uses a 63-015 airfoil, and therefor the pitch should be slightly less. The blades have -7-degrees of twist. The blade loading in hover at GW is 91-lb/sq-ft.

For comparison, the Schweizer/Hughes 300C uses an 0015 airfoil and it's blades have -8.7-degrees of twist. The blade loading in hover at GW is also 91-lb/sq-ft.

Last edited by Dave_Jackson; 4th Sep 2003 at 14:54.
Dave_Jackson is offline