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What the Phase I Flight Test Period Is Actually For

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When an amateur-built aircraft receives its airworthiness certificate, it does not simply join the traffic pattern like any other airplane. It enters a defined flight test period, commonly called Phase I, spelled out in the… 

The Annual Condition Inspection and What It Asks of an Owner

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Owning an amateur-built aircraft comes with a recurring obligation that many new builders underestimate until the first anniversary of their airworthiness certificate arrives. Every experimental amateur-built aircraft must undergo a condition inspection once every twelve… 

Making Use of the Builder Support Network Inside the EAA

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Building an aircraft is often described as a solitary pursuit, a lone craftsman in a garage measured against years of patient work. That image is romantic and largely wrong. The builders who finish, and finish… 

Why Stall Behavior Matters More Than Top Speed in Aircraft Design

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When pilots discuss aircraft, conversation often drifts toward impressive numbers: cruise speed, climb rate, range. Yet experienced aviators and designers know that the most important characteristic of any aircraft is not how fast it goes… 

How Center of Gravity Quietly Governs Every Flight

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Among all the variables a pilot manages, few are as consequential and as easily overlooked as the center of gravity. It does not appear on the instrument panel, it changes with every passenger and bag,…