Trouble with plotting Riblet airfoil...

[mccdhash]

I'm trying to plot a Riblet GA30-613.5 airfoil using the ordinates from his GA Airfoils book...here is the problem. Using the chart on page 71 for the 30-613.5 airfoil, I dont get anything remotly smooth from these ordinates? Am i missing something here??? STA colum is percent of chord, upper is percent of chord, and lower is percent of chord, YES??? when its plotted the L/E is not smooth and the last 15-20% of the T/E is not smooth either!!! Could it be just bad calculations? I'm at a loss here...

Thanks,

mccdhash

 

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