I have over 1200 hours in the OH6A and fly for a police department. The OH6A has numerous references in the Operators manual (-10) which cautions about right hand turns when you are close to the ground and at a slow speed.
In the OH6a, (500C) the V tail can develope lift and force the nose of the helicopter down and to the right when you have a right quartering tail wind. This is not loss of tail rotor authority. It is the wind exerting a force on the LARGE stabalizers. If you do not have enough altitude you may not be able to correct the attitude without ground contact.
I have experienced this on a number of occassions but because of altitude been able recover. Other unpleasant things can happen at High gross weight, Density altitude, slow airspeed, etc.
What type of a "tail spin" are you refering to? Is it the nose being force down during slow flight or LTE? Provide some more information and possibly I can provide you with more information.
If you would like like can email me.
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