Cart Shopping Cart My Store Account Orders Downloads Shopping Cart “25. The Effect of Overload and Unbalance on Long Range Operation” has been added to your cart. Continue Shopping “20. Wing Weight Estimating Simplified” has been added to your cart. Continue Shopping “19. The Elements of Field Weight and Balance Control” has been added to your cart. Continue Shopping Remove item Thumbnail image Product Price Quantity Subtotal × 22. Preliminary Design Equations for Aircraft Weight Estimation $20.00 22. Preliminary Design Equations for Aircraft Weight Estimation quantity $20.00 × 25. The Effect of Overload and Unbalance on Long Range Operation $20.00 25. The Effect of Overload and Unbalance on Long Range Operation quantity $20.00 × 20. Wing Weight Estimating Simplified $20.00 20. Wing Weight Estimating Simplified quantity $20.00 × 19. The Elements of Field Weight and Balance Control $20.00 19. The Elements of Field Weight and Balance Control quantity $20.00 Coupon: Apply coupon Update cart Available coupons (Click to apply). Cart totals Subtotal $80.00 Tax $0.00 Total $80.00 Proceed to checkout