Cart Shopping Cart My Store Account Orders Downloads Shopping Cart Remove item Thumbnail image Product Price Quantity Subtotal × 60. Application of the Trefftz Circle of Inertia to the Analysis of Aircraft Weights Data $20.00 60. Application of the Trefftz Circle of Inertia to the Analysis of Aircraft Weights Data quantity $20.00 × 78. Empirical Formulae for Radii of Gyration of Aircraft $20.00 78. Empirical Formulae for Radii of Gyration of Aircraft quantity $20.00 × 83. Simulation of Airplane Mass Properties in the Design and Construction of Wind Tunnel Flutter Models $20.00 83. Simulation of Airplane Mass Properties in the Design and Construction of Wind Tunnel Flutter Models quantity $20.00 Coupon: Apply coupon Update cart Available coupons (Click to apply). Cart totals Subtotal $60.00 Tax $0.00 Total $60.00 Proceed to checkout