Aero ‘lectrics
Vibration is not good for engines, airframes or instruments. Jim Weir explains how to fashion vibration analysis equipment for less than retail cost.
Wind Tunnel
Aerodynamic flutter has been a recent concern in the homebuilt world. What exactly is flutter? What causes it? Barnaby Wainfan clarifies an often misunderstood and potentially dangerous phenomenon.
All About Avionics
Stein Bruch reviews the airborne weather choices for the homebuilder, using technology undreamed of only 20 years ago.
Datalink Weather: Long-Term Exposure
Marc Cook relates his experience, more than four years' worth, with XM-sourced inflight weather.
Buying Used Lightning Detection
Avionics guru Larry Anglisano examines the market for used lightning-detection gear.
Builder Profile: Orange Appeal
Marc Cook profiles a rookie Copperstate show winner: a spectacular F-1 Rocket with a distinct Harley vibe.
The Independence Project: A Power Finish
The engine and prop complete the building phase, and the RV-12 is ready for the flight test phase. By Dave Martin.
Cut the Can, Man
Inspecting your filter after an oil change is a good idea, but what tool is best for opening the can? Bob Fritz tests the gamut of oil filter cutters so that you don't have to.
Engine Beat
Removing your oil filter is not nearly as easy as putting it on. Steve Ells shows you how to take it off without turning your workshop into a Hazmat site.
Ask the DAR
Can a powered parachute be classified as Experimental/Exhibition if it missed the ELSA deadline?
In Case You Missed It
Ask the DAR
Certified aircraft converted to Experimental, ELSA vs. E/A-B, op limits for major changes.
The Home Machinist
If you need to send a part out to be built by a professional shop, a good drawing, well identified, is essential. The KISS principle applies, and be sure you don't request closer tolerances or more exotic materials than you really need, or it will cost you.
Design Process: Horizontal Tail
The horizontal tail has two functions. It provides control power to trim and maneuver...