1130Pc Visible Internal Combustion Ohc Rotary Engine Motor Working Model DIY Kit Build a Realistic Engine Model ? Order Yours Today! Experience the innovation of automotive engineering with this Rotary Engine Building Set, a runnable model designed for adults, teens, and STEM enthusiasts who want to explore one of the most unique engine designs ever created. Features Highlights: ? Real Rotary Engine Simulation ? Faithfully reproduces the rare and fascinating internal structure of a rotary engine. Features synchronized rotor motion, gears, and central fan movement powered by an electric motor for a dynamic, realistic experience. ? Electric Motor with 4-Speed Adjustment ? Equipped with a high-performance motor and battery box (requires 6 batteries, not included). The 4-speed lever lets you control rotation speed while the central fan spins to simulate real intake and cooling effects. ? Step-by-Step Assembly with 3D Instructions ? Includes 1130+ numbered ABS parts and detailed 3D color instructions, making complex mechanical assembly accessible and enjoyable. Ideal for builders exploring advanced engineering structures. ?? Durable, High-Quality Materials ? Crafted from premium ABS that is smooth, durable, and rigorously tested. Tight interlocking components ensure stable construction and long-lasting performance during operation or display. ? A Premium Gift for Collectors Engineers ? Packaged in a beautifully designed gift box, this rotary engine model makes an exceptional present for birthdays, Christmas, Halloween, Thanksgiving, New Year, or any special occasion. Bring the engineering marvel of the rotary engine to life ? a stunning collectible that combines mechanical learning, hands-on creativity, and impressive display value. Shipping Return Policy We proudly offer FREE shipping on all orders within the lower 48 U.S. states. Please note that we do not offer combined shipping, local pickup, or delivery to P.O. boxes or APO/FPO addresses. Orders are shipped within 1?3 business days. Once the item ships, delivery typically takes an additional 1?5 business days. Note: Most items arrive very quickly ? usually within 2?4 business days from the purchase date. Tracking information will be provided as soon as your order ships. Customer satisfaction is very important to us, and we want you to have a great experience. If there are any issues with your order, please contact us directly before opening a case or requesting a return. This allows us to resolve the matter quickly and provide you with a return authorization if needed. We proudly offer 30-Day Free Returns for your convenience.