polar curve

The points can be connected by a line known as the 'polar curve'.

Polar curves of lift versus drag initially have a high slope.

Many polar curves exist for the possible sail twists and draft positions.

Each type of glider has a unique polar curve.

Other polar curves can be measured after loading the glider with water ballast.

The effect of airspeed on the rate of descent can be depicted by a polar curve.

The ring is usually calibrated in either knots or meters per second and its markings are based on the aircraft's polar curve.

A polar curve is a graph which contrasts the sink rate of an aircraft (typically a glider) with its horizontal speed.

When in sinking air, the polar curve shows that best speed to fly depends on the rate that the air is descending.

Consequently, the line for the best glide angle will only just graze the polar curve, i.e. it is a tangent.

Point 1 to the optimum forward force still leaves the polar curve flattening, which mean that the drag slowed the boat's progress more than lift adds.

The origin for a polar curve is where the air-speed is zero and the sink rate is zero.

The points where these tangents touch the curve are the points of intersection between the curve and the polar curve with respect to the given point.

Towards the end of year 2, students learn polar coordinates, polar curves, synthetic division, locus definitions and eccentricity, and curve sketching.

Conversely, for a tail wind, the polar curve moves away from the origin so that best glide speed is lower and the effective glide ratio is improved.

Glider Performance Airspeeds An animated explanation of the basic polar curve, with modifications for sinking or rising air and for head- or tailwinds.

This means that we should not increase incidence beyond the point of the polar curve or decrease the tangent at this point less than the tangent of β.

There are also poles and polar curves to curves of higher degree than the second, and poles and polar planes to surfaces of the second degree.

There are many other factors but the end result is more efficiency at speed and a greater range of performance between Mid sink and Max glide essentially a flatter polar curve.

Requirements included a minimum sinking speed of only slightly over 0,5 m/s, a best glide ratio of 32 to 35 with a low curvature polar curve to give good performance at higher speeds.

The pilot will use the polar curve information for the particular glider to derive the exact speeds to fly depending on the lift and sink conditions in which the glider is flying.

Published polar curves will often be shown for a clean wing in addition to a dirty wing with bug splats represented by small pieces of tape applied to the leading edge of the wing.

The loss of height can be measured at several speeds and plotted on a "polar curve" to calculate the best speed to fly in various conditions, such as when flying into wind or when in sinking air.

In addition to TE compensation, the Netto variometer adjusts for the intrinsic sink rate of the glider at a given speed (the polar curve) adjusted for the wing loading due to water ballast.

In still air the polar curve shows that flying at the minimum sink speed enables the pilot to stay airborne for as long as possible and to climb as quickly as possible, but at this speed the glider will not travel as far as if it flew at the speed for the best glide.