Cart Shopping Cart My Store Account Orders Downloads Shopping Cart Remove item Thumbnail image Product Price Quantity Subtotal × 7. Predetermination of Weight Efficiency $20.00 7. Predetermination of Weight Efficiency quantity $20.00 × 10. Calculation of Landing Gear and Hydraulic System Weights $20.00 10. Calculation of Landing Gear and Hydraulic System Weights quantity $20.00 × 26. Weight Control Organization for Manufacturers $20.00 26. Weight Control Organization for Manufacturers quantity $20.00 × 30. The Effect of Center of Gravity on Performance $20.00 30. The Effect of Center of Gravity on Performance quantity $20.00 × 33. Some Problems in the Selection of Optimum Airplane Configurations for Minimum Weight $20.00 33. Some Problems in the Selection of Optimum Airplane Configurations for Minimum Weight quantity $20.00 Coupon: Apply coupon Update cart Available coupons (Click to apply). Cart totals Subtotal $100.00 Tax $0.00 Total $100.00 Proceed to checkout