BG-12 Polars

BG 12/16 published polar.

BG 12B published polar.

My derrivation of the information.

Minimum sink.

Below are speeds to fly cross country. Take the expected thermal strength (rising air) and draw a tangent to the polar to find the speed to fly between thermals. Experience says "fly fast" or to the right side of the tangent, when possible.

Zero lift (or sink...).

1 knot up.

2 knots up.

3 knots up.

4 knots up.

5 knots up.

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Last update 18 November 2011