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In Case You Missed It

Top Overhaul

3
Gray oil is good, but what about black oil that looks like tar?

Light Stuff

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Roy Beisswenger takes a look at how you too can join the league of record holders in the ultralight world.

Wind Tunnel

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Increasing the weight of an aircraft will affect its performance in all phases of flight.

Flange Transplant

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Moving the end flange on a rib. By KITPLANES® Staff.