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Hummel Aircraft holds its 2021 fly-in at its new home in Howell, Michigan.

Where'd Everybody Go?What happened to "Ask the DAR"? He wasn't in my last issue,...

Bob Fritz is back from a long hiatus with a discussion about the difference between screws and bolts and what all of those ASME numbers mean.

In the last few months, we have explored how planform and taper affect both...