Cart Shopping Cart My Store Account Orders Downloads Shopping Cart Remove item Thumbnail image Product Price Quantity Subtotal × 8. A Practical Method for Wing Weight Estimation $20.00 8. A Practical Method for Wing Weight Estimation quantity $20.00 × 3. Aircraft Accessories - A Weighty Problem $20.00 3. Aircraft Accessories - A Weighty Problem quantity $20.00 × 34. Pneumatic Controls for Aircraft $20.00 34. Pneumatic Controls for Aircraft 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