V-Parameter

The V parameter adjusts the tendency of motion during pilot commands. Higher V values cause the helicopter attitude to adjust more aggressively to obey command input. For instance, when a stick position command is given, a high V value causes the helicopter to have a relatively sharper angle in response. This allows the helicopter to reach the desired speed sooner, but sometimes the helicopter will become unstable and difficult to control. A low V value causes the helicopter to respond slower to stick position commands, even with very extreme stick positions.

One can say that the V parameter adjusts the tendency of motions, and the change of control feeling after the adjustments will be similar to the difference between using hard or soft rotor head. But V is not the sole influence on the time of respond, please note.

The V parameter adjusts the tendency of motions, and gain adjusts the feedback strength of such tendency. V is adjusted according to user preference, but gain has a theoretical best possible value.

I-Parameter

The I parameter corresponds to consistent and accurate speed, or steady hovering, when the helicopter receives external disturbance. When the pilot gives a command through stick position, the helicopter might not be able to achieve the desired speed due to head wind. The larger the I value, the faster the helicopter will compensate and adjust for wind, while smaller I values may cause more time for the helicopter to reach the commanded speed.

Similarly, when the helicopter is hovering and wind blows the helicopter away from the hover point, the helicopter will gain a certain acceleration proportional to the I value to return to the hover point. The larger the I value, the sooner the helicopter will make this adjustment.

When the I value is too low, the helicopter will drift within a certain range, similar to what happens when a gain parameter is too low.