Winter Instruments QM 2 Slip / Skid Indicator

Winter Instruments QM2 Slip / Skid Indicator

General Description

Witer Instruments QM2 - Wherever there is no turn and bank indicator, it is advisable to install a bank indicator. This simple instrument is particularly useful in training aircraft.

Slip/Skid Size II, No. 1120 Winter Slip/Skid.  Size II fits 2.¼″ wide by 1.¼″ high rectangular opening.

Slip vs. Skid

Slipping Turn An uncoordinated turn in which the aircraft is banked too much for the rate of turn, so the horizontal lift component is greater than the centrifugal force, pulling the aircraft toward the inside of the turn.

Skidding Turn An uncoordinated turn in which the rate of turn is too great for the angle of bank, pulling the aircraft to the outside of the turn.

What is an Inclinometer or Slip / Skid Indicator?

A slip/skid indicator is also known as an inclinometer. Like the magnetic compass, this instrument requires no electrical power or input from other aircraft systems. The inclinometer is influenced by centrifugal force and gravity. Mounted in the bottom of a turn–and–bank indicator or mounted separately in the instrument panel, the inclinometer consists of a metal ball in an oil–filled, curved glass tube. When the glider is flying in a coordinated fashion, the ball remains centered at the bottom of the glass tube. The inclinometer differs from the yaw string during uncoordinated flight. The ball moves to the inside of the turn to indicate a slip and to the outside of the turn to indicate a skid. Remember the phrase, “step on the ball” in reference to the inclinometer; it helps coordinate the turn using rudder inputs. The long glider wing tends to increase the adverse yaw effects from the ailerons and requires more rudder control than many aircraft. – Source: Glider Flying Handbook.

W&W typically stocks Winter Instruments QM2 Slip / Skid Indicators.