By Bill Freeman EAA #148597, Reprinted from the 1981 EAA Designee Newsletter
Technical Tips Manual Vol 2

In the aircraft community the term "metal fatigue" is often used without any explanation, usually in reference to some part which has failed an inspection or perhaps a part which has failed in service.

Some self-styled authorities will say that the metal "crystallized," which caused it to crack. You may envision the metal somehow getting "tired" and failing, and in some older aircraft it might seem…

Tim Dahnke will be joining the IAC team on Monday, March 4 as the new IAC Executive Director.  He will have responsibility over all IAC operations, including managing events such as the IAC presence at AirVenture and the U.S. National Aerobatic Championships. In the role, he will enjoy interacting with the IAC Board of Directors and building support for the IAC membership and IAC chapters while continuing to grow the relationship between IAC and EAA.

Tim is a Wisconsinite. He and his wife Roxy currently reside in Oshkosh, Wisconsin. Aviation has always been a part of Tim’s life. He…

In 1970, Verne was one of the earliest members of the IAC having joined in the first few weeks of the club…

 The 2024…

At their meeting in Oshkosh, Wisconsin on November 11-12, the IAC board of directors approved the recommend Known Compulsory sequences for both power and glider categories for the 2024 contest season.

The sequences attached at the bottom of this page were prepared by the sequence committee. The committee recommended using the same Primary Known from last year. 

All Sequences went through the 30-day member comment period and although there were very few comments (6 total with only 2 having recommendations and 4 being complementary of the sequences), recommendations were fully…