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In Case You Missed It

Practical Electrical

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Battery facts and fables—Lithium considerations. By Robert L. Nuckolls, III.

Wind Tunnel

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How do the power-to-weight ratio, wing loading, drag effects and propeller choices affect an aircrafts climb rate and climb angle?

Maintenance Matters

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Differential compression test.

Marketability

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The manufacturer must be able to sell enough airplanes to stay in business and make some money.