Engine Theory: Oil System Design

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Exploring the components that keep your engine alive.

Completions

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Builders share their successes.

Ask the DAR

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Converting a Taylorcraft to E/A-B, rebuilding and modifying a Rans S-9.

Promises, Promises

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Remembering Jim Bede Sr.

Vacuum Forming Leading Edges

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Making long, straight bends in sheet metal is easier than you think.

Print Your Own Parts

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Using a 3D printer to make an avionics fan shroud.

Speed Deburring

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Why turn a hand crank when electrons work so cheap?

Separator or Condenser?

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Air-oil separators 101.

Aircraft Records and Logbooks

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What's required for Experimental/Amateur-Built Aircraft?

Engine Theory: Oil

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Oil: lubing and cooling the source of thrust.

In Case You Missed It

Lancair Love Story

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Few homebuilders forget the first airplane they constructed, even if they go on to do others. That was the case with Mike Maxwell, who had pretty much given up on ever seeing his Lancair 235 again. But life is nothing if not full of surprises, and Mike was in for a big one.

Alternative Energies

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Dale Kramer invigorated the ultralight movement in the 1970s with the Lazair. Now he's doing it again-with a battery-powered version. By Dean Sigler.

Split Decision

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Building a vertical-split cowl for an RV-7A.

Maintenance Matters

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Changing your oil.