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After a quick and easy installation, PS Engineerings new PMA9000EX audio panel is test-flown by Editor-in-Chief Marc Cook in his Glastar Sportsman.

Levil Aviation’s BOM puts pitot-static, AHRS, GPS, ADS-B In, and its own power source right under your wing.

John Stahr performs airbrush magic on the jet.

Columnist Barnaby Wainfan continues his flight-testing discussion by taking up the topic of longitudinal stability. By identifying the origin of the problem, whether it be a control-system issue, a too-small static margin, or a combination of the two, the flight tests he recommends will help to isolate the issue.