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Old 1st Feb 2012, 16:25
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bookworm
 
Join Date: Aug 2000
Location: UK
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The Incomplete Guide to Airfoil Usage

Cessna 152: root NACA 2412 tip NACA 0012
Cessna 172 Cutlass: root NACA 2412 tip NACA 2412 mod
Piper PA-28 Cherokee: NACA 65-415
Piper PA-34 Seneca: NACA 65-415

NACA report 824
gives
2412 Clmax (1.5-1.6) at about 16 degrees
64-415 Clmax (1.4-1.6) at 14-16 degrees
for a smooth, unflapped aerofoil, not accounting for 3D effects.

That looks fairly typical.
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