PPRuNe Forums - View Single Post - Sikorsky X2 coaxial heli developments.
View Single Post
Old 9th December 2009 | 11:41
  #546 (permalink)  
Graviman
 
Joined: Nov 2004
Posts: 1,334
Likes: 0
From: Cambridgeshire, UK
Hunt3r, have you heard something about a DoD contract then?


Originally Posted by Dave Jackson
The primary advantage of the Intermeshing over that of Coaxial is the reduced disk-loading for physical identically rotor-disks. In hover, the Intermeshing's larger 'effective disk area' provides a greater efficiency (Figure of Merit). In forward flight, the Intermeshing provides a more equitable disk loading because the rotor-rotor overlap of both rotors is in the 'reverse velocity' region.
Dave, i think the fairest comparison (when i get around to it) would be to compare machines capable of landing in the same ground box area. This would allow the benefits of better FM through such things as reverse velocity utilisation to be evaluated in a holistic way.

Last edited by Graviman; 9th December 2009 at 18:18. Reason: Typo...
Graviman is offline  
Reply