In Case You Missed it
Practical Electrical
Battery facts and fables: lithium lead-acid equivalency. By Robert L. Nuckolls, III.
Alternative Energies
Experimental Soaring Workshop: This annual gathering of designers and builders of sailplanes, hang gliders and paragliders is an idea festival, and a must-attend event for enthusiasts. By Dean Sigler.
Ask the DAR
When can an ELSA be used commercially? Can an E/AB aircraft be certificated without a transponder?