Cowl Plug Footballs

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Nerf footballs give their all for flight safety. By Bill Repucci.

Maintenance Matters: Compression Testing

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Checking a cylinder’s health.

Quick Mount for a Handheld

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Home shop machinist

Shop Tips: Undrilling a Hole in Steel

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A brass block makes it easy.

Tech Tip

7
Forming a Composite Blister.

Home Shop Machinist

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Using tools to make tools. Bob Hadley.

DIY Bond Studs

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Cost-effective ways to restrain wiring and small equipment.

Aero ‘lectrics

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If you want to keep your paint and other supplies from freezing next winter, try this relay and heater (made to work in conjunction with last month’s temperature sensor project).

Aero ‘lectrics

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Next winter, keep your aviation supplies from freezing with this DIY temperature sensor.

Aero ‘lectrics

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Repairing a malfunctioning headset may be not only inexpensive, but completely doable.

In Case You Missed It

Zenith CH 650 B

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With the UL Power 350iS engine and other mods, the new CH 650 B has advanced Zenith Aircrafts product line. By Marc Cook.

DIY Firewall Penetration

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Properly seal the firewall penetrations to keep fumes from entering the aircraft cabin.

Wind Tunnel

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Barnaby Wainfan brings aerodynamics to life with an illustrated field guide to the various devices seen at AirVenture.

Hey There, Charlie

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I’m sure there were perfectly fine used homebuilts closer to me than N531CE—it was...