Bf109 information, lighting a fuse and running for cover!

[Crumpp]

"The P-51 used a NACA/NAA 45-100 laminar flow airfoil which had not been well tested "

That is actually a fair statement. The P-51 series only achieved laminar flow under the ideal conditions of a wind tunnel when especially prepared.

In actual service condition, the aircraft did not achieve its design goal of laminar flow.

Thorough testing would have revealed this but wartime expediency did not. One of the consequences of designing an aircraft under such short notice.