Strut—Any wooden member intended to take merely the stress of direct compression.

Strut, Interplane—A strut holding the top and bottom surfaces apart. [31]

Strut, Fuselage—A strut holding the fuselage longerons apart. It should be stated whether top, bottom, or side. If side, then it should be stated whether right or left hand. Montant. [32]

Strut, Extension—A strut supporting an "extension" when not in flight. It may also prevent the extension from collapsing upwards during flight. [33]

Strut, undercarriage— [33a]

Strut, Dope—A strut within a surface, so placed as to prevent the tension of the doped fabric from distorting the framework. [34]

Serving—To bind round with wire, cord, or similar material. Usually used in connection with wood joints and wire cable splices.

Slip, Propeller—The pitch less the distance the propeller advances during one revolution.

Stream-Line—A form or shape of detrimental surface designed to produce minimum drift.

Toss, to—To plunge tail-down.