Buyer's Guide

Flight testing for longitudinal stability problems continues this month as columnist Barnaby Wainfan details tests for stick force as related to trim and stick-free stability of an aircraft. The object is to gather data and analyze it to see if the hypotheses about the nature of the problem hold up under scrutiny.

DAR Mel Asberry answers questions about when you need A&P signoff, re-certifying an airplane to make it an LSA (hint: cant be done) and pre-registration of an Experimental.

Go slow and use the right tools.

Builders share their successes.