When conducting aerodynamic testing related to airflow over an object, how do you ensure that you've matched the conditions from one test to another, and why does it matter?
Owners of a certain type of Continental engine, the cam-at-the-bottom variety, are undoubtedly familiar with the annoying seepage of oil from swaged pushrod tubes and rubber pushrod seals. Now there's a cure, and author Ron Darcey describes the fix.