Cart Shopping Cart My Store Account Orders Downloads Shopping Cart “9. Aircraft Balancing and Center of Gravity Control” has been added to your cart. Continue Shopping Remove item Thumbnail image Product Price Quantity Subtotal × 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 × 34. Pneumatic Controls for Aircraft $20.00 34. Pneumatic Controls for Aircraft quantity $20.00 × 12. Weight Control - Aircraft Design Problem $20.00 12. Weight Control - Aircraft Design Problem quantity $20.00 × 9. Aircraft Balancing and Center of Gravity Control $20.00 9. Aircraft Balancing and Center of Gravity 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