Trog,
I like your thinking about the event of a tail rotor control failure, but this sentences about OEI lading confuses me.
In the event of an engine failure in flight we would in almost all circumstances
Quote:
elect to fly a normal approach to running landing on your runway.
Until LDP we are well outside the SINGLE ENGINE H/V curve and at LDP (for example in a Bell 412 at 100 feet rad alt and 40 kts IAS) reach the leading edge of the SINGLE ENGINE H/V curve - we maintain 40 kts to 50ft rad alt then reduce speed and altitude by flaring for a running landing staying under and clear of the curve throughout the profile.
With both engines performing impeccably or following a failure we avoid any exposure!
I may be not understanding your post, are you telling me that staying out of the H/V you are safe in case the last engine fails in short finals? that curve in the 412 RFM doesn't mean your are safe to do an auto, it's just the profile to achieve a safe lading with OEI onto a prepared surface, I'm sure you know that, but the issue here is the landing in OEI condition.
As crab says
BTW do you mean single engine HV curve (ie when you are on one engine and it fails) or do you mean the Safe single engine envelope (where you are on two but will still (ACHIEVE A SAFE LADING) fly if one goes)?
I can't remember a safe single engine H/V curve in the 412 RFM.
Regards
Aser