PPRuNe Forums - View Single Post - vortex ring alt + vsi
View Single Post
Old 18th Jun 2007, 11:31
  #32 (permalink)  
Thomas coupling
 
Join Date: Aug 2000
Location: UK
Posts: 3,680
Likes: 0
Received 1 Like on 1 Post
There is definitely a misunderstanding of philosophies here:
IF you understand the aerodynamics of fully developed VRS, then you will naturally understand that the control of that helicopter has been removed from the pilot. It is an UNSTABLE state where the pilot has to wait for the a/c to remove ITSELF from VRS. It may choose NOT to do so!!!.
Fully developed VRS provides the following symptoms:
loss of control in all three planes.
ROD well in excess of 4000' +, even up to 8000'/min.
All qualified instructors (military anyway) are taught this in ground school. It has been removed from the UK syllabus for atleast the last 20 yrs, because instructors were crashing helos. Even then, they were demonstrating in ignorance, but atleast they started at 6,7,8 thousand feet in preparation for the horrendous ROD's.
Either you are talking about incipient VRS where you can still use the cyclic/coll/pedals and are experiencing ROD's of max 2000' ish, or you are extremely naive and plain negligent.
Thomas coupling is offline