A practical handbook surveying the principles and methods used in building aircraft, with chapters on material selection and strength-to-weight tradeoffs, spars, struts, wing and fuselage construction, fittings, undercarriage types, control systems, wires and connections, engine mountings, and erection and alignment. It addresses manufacturing practice and standardization of components, describes trussing and assembly details, and emphasizes engineering procedures that balance structural integrity with minimal weight.