Cart Shopping Cart My Store Account Orders Downloads Shopping Cart “4. The Weight Engineer and the Flutter Problem” has been added to your cart. Continue Shopping “12. Weight Control – Aircraft Design Problem” has been added to your cart. Continue Shopping “20. Wing Weight Estimating Simplified” has been added to your cart. Continue Shopping Remove item Thumbnail image Product Price Quantity Subtotal × 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 × 4. The Weight Engineer and the Flutter Problem $20.00 4. The Weight Engineer and the Flutter Problem quantity $20.00 × 12. Weight Control - Aircraft Design Problem $20.00 12. Weight Control - Aircraft Design Problem quantity $20.00 × 20. Wing Weight Estimating Simplified $20.00 20. Wing Weight Estimating Simplified 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