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 × 9. Aircraft Balancing and Center of Gravity Control $20.00 9. Aircraft Balancing and Center of Gravity Control 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 × 32. Weight and It's Effect on the Operation and Performance of Commercial Aircraft $20.00 32. Weight and It's Effect on the Operation and Performance of Commercial Aircraft quantity $20.00 × 3. Aircraft Accessories - A Weighty Problem $20.00 3. Aircraft Accessories - A Weighty Problem quantity $20.00 × 15. Organization for Weight Control $20.00 15. Organization for Weight Control quantity $20.00 Coupon: Apply coupon Update cart Available coupons (Click to apply). Cart totals Subtotal $120.00 Tax $0.00 Total $120.00 Proceed to checkout