In Case You Missed It
Small-bottle O2: Aithre, Aerox Compacts
Personal-sized oxygen bottles save space and weight, while serving as belt-and-suspender backup. But go bigger if you use O2 regularly.
25th Anniversary: Power Shift
From scrounging engines to building Experimental powerplants: Editor-in-Chief Marc Cook looks at the last 25 years in engine choices for homebuilders.
Reinventing the Wheel
Do you really need to spend your time coming up with a better solution when the one provided is more than good enough?
Time to Vent
When it comes to fuel-tank vents, there is a wide variety of choices. We look at the basic types and consider their relative merits.