AeroFoil Vesion 2.1 Analysis at Stall Speed

Following on from the airfoil data created in the previous post, I thought it might be interesting to import the data into an airfoil design program and get a feel for the performance of the airfoil near the quoted stall speed for the GN-1 Aircamper, i.e 25 mph.

AreoFoil Version 2.1 is a 2-dimensional airfoil design and analysis program written and distributed by Mr Donald L Reid P.E.

You can download Mr Reid's program here: http://aerofoilengineering.com/

Below is a summary of airfoil coefficients for angles of attack ranging from -4.5 degrees to 16.5 degrees at a free stream air velocity of 25 mph using Areofoil Version 2.1. The numbers obtained for the lift coefficients look far too low and I'm not sure why ? Any feedback would be appreciated.