Deletion of Phase lag (rotorcraft)

Comment: I added a couple of secondary references describing phase lag and rewrote the article from those references. It is shorter, but hopefully on a more solid basis. In my search for references, phase lag looks to be a notable topic and it is an effect to be accounted for in all modern helicopters. A notable topic, per  and an article with surmountable problems, per , suggests that the article be kept
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG||WP:SURMOUNTABLE)

Comment: If it's a valid topic, but is wrong, fixing the article is preferable to deleting.  
Stance: comment
Cited policy: Wikipedia:Be bold (WP:SOFIXIT)