VHS video format is always in stock, and PAL (European) format takes about a week longer for delivery. If you want PAL format, specify at time of placing your order.
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This video reviews the basics of powered airplane aerodynamics,
the Four Forces of flight, airplane balance & stability, and
the thrust/drag relationship.
VHS video format is always in stock, and PAL (European) format takes about a week longer for delivery. If you want PAL format, specify at time of placing your order. |