Originally Posted by
Robbiee
There was never really a confusion over the two terms, only the refusal by some to accept that different cultures use the same words to describe different things.
That was exactly the cause of the confusion. And the refusal of some to acknowledge that VRS and SWP are different.
In answer to your question about the R22 lateral trim - I believe it is to help with Inflow Roll (roll towards the advancing side) - usually perceived as being purely a low speed phenomenon but present in smaller measure throughout forward flight. The airflow entering the front of the disc has a different inflow angle to the air entering the rear of the disc (more time travelling across the disc to be affected by it) creating an inequality of lift between front and rear and resulting in a right roll tendency.