Image Item No. Description  43121c03 (Inv)  Engine, Large with Dark Bluish Gray Center (43121 / x577) Catalog: Parts: Aircraft  4870c03 (Inv)  Plate, Modified 2 x 2 Thin with Dual Wheels Holder - Split Pins with Light Bluish Gray Wheels and Black Tires (4870 / 4624 / 3139) Catalog: Parts: Aircraft  2415c02 (Inv)  Plate, Modified 2 x 2 Thin with Plane Single Wheel Holder with White Wheel with Black Tire 14mm D. x 4mm Smooth Small Single (2415 / 3464c01) Catalog: Parts: Aircraft