Shawn Large number of ways, indeed
Add for instance to this helicopter loading. A very lightly loaded heli will also produce a smaller induced velocity, its almost as simple as that : at 750 kg you have approx 16% less induction than at 1100 kg (R44), the weight difference being 30%. Induction goes approx with the square root of weight: at hover this is 6.3 m/s resp 7.5 m/s which is a difference of 16% .
SAS, of course. My question is how do you determine you have near zero speed, based on what ? IAS doesn't help, because near zero, GPS doesn't help because of wind, no visual clues, unless there is hot air balloon in the vicinity...
d3