On Wednesday, January 20, 2016 at 12:05:50 PM UTC-5, Eric Nielsen wrote:
I've recently purchased an LS-3a. My P.O.H. does not include a Polar Curve Graph, so I'm having difficulty finding difficulty in finding speeds for Min. sink, speeds to fly in Headwind/Tailwind, and in sink. Any Help is appreciated.

The Johnson flight tests, available from the Soaring magazine archives, have the information you need.
Good Luck
UH