Polar Plotting results?

[gouch]

I have just been playing around with the programme on http://soaring.cnde.iastate.edu/calcs/frames.shtml that Ollie refered another poster to, and I put in some airfoils to have a look.

I am building a Bae Hawk sloper and had an rg14 airfoil cut out by a local wingcutter, so i thought i'd put this airfoil in and a few others which where recommended as options. 6060 and 6063
I do not know how to read the graph and was wondering how it is translated to real life performance.

The wing area is 379" square 48.8" span and guessed a final weight of 35 oz
Here is the graph.

I appreciate any assistance with this.
Cheers
Paul

[gouch]

And here is the same comparison but weight at 50 oz.

[Sparky Paul]

The SD6060 has the best speed range... Cl to Cd. It will slow down less than the other two at comparable Cls when you're pulling in a corner, according to those polars.
The slight disadadvantage at the lowest Cd probably wouldn't be detectable in flight.

[gouch]

Thanks Sparky, would I be right to say that the heavier it is
the better the rg14 performs at the faster end of the scale
in my particular plane? Or am I missing the mark.
Cheers
Paul

[Sparky Paul]

Looking at this plot from another source, the RG-14 shows a wider tolerance for yankin' and bankin' relative to the S6063.
But it's "untidy" at low Re's.
http://www.nasg.com/afdb/list-airfoil-e.phtml
Basically for an airplane as small as you're looking at, it probably doesn't make a whole lot of difference which airfoil you use. The plane will get real small real fast, so any benefit due to a lower drag situation will be lost when it turns.
The RG-14 here might retain energy better turning.

[gouch]

The plane will get real small real fast

That's all I wanted to hear:D
Thanks for the info.
This is my first attempt at building a fast plane(relative to what I have previously built) and hopefully it will be fast.