In Case You Missed It
Grinvalds Orion
Jean Grinvalds’ plansbuilt four-seat pusher design was ahead of its time, predating the Bede BD-5, VariEze, Prescott Pusher and Cirrus VK-30. By Geoff Jones.
Engine Beat
How are your cylinders doing? A differential compression test can uncover any problems-almost before they start. Steve Ells explores what the results mean, and what to do about them.
DIY Adjustable Rib Centerline Marking Tool
As a new builder I came quickly to the step of needing to mark rib centerlines to align the ribs with the predrilled holes in the skin.