EAA - The Spirit of Aviation - The Comanche 400, featured here, is a significantly faster and heavier variant compared to the Comanche 250, largely due to the Lycoming IO-720 engine, developed
![Tanis Engine Preheat Kit - Lycoming (IO-720 Series), 8 Cyl/115V, Tanis Aircraft Heaters, EMAPA, piston preheater, aircraft preheater, Tanis Tanis Engine Preheat Kit - Lycoming (IO-720 Series), 8 Cyl/115V, Tanis Aircraft Heaters, EMAPA, piston preheater, aircraft preheater, Tanis](https://cdn4.volusion.store/ugavy-szapz/v/vspfiles/photos/Tanis-P-TA1045-1-2.jpg?v-cache=1698665863)
Tanis Engine Preheat Kit - Lycoming (IO-720 Series), 8 Cyl/115V, Tanis Aircraft Heaters, EMAPA, piston preheater, aircraft preheater, Tanis
GAM Group - The heart of the Aero Commander 680 is the Lycoming IO-720 producing 400 hp. Getting ready for test after an overhaul by Neil and Jackie Moon in the GAM
![Lycoming IO-720-D Aircraft Engine Parts Catalog Manual ( English Language ) , 1977 - PC-119 - Aircraft Reports - Aircraft Manuals - Aircraft Helicopter Engines Propellers Blueprints Publications Lycoming IO-720-D Aircraft Engine Parts Catalog Manual ( English Language ) , 1977 - PC-119 - Aircraft Reports - Aircraft Manuals - Aircraft Helicopter Engines Propellers Blueprints Publications](https://cdn10.bigcommerce.com/s-noei7xnm/products/1439/images/1800/IO_720_IPC0001__17562.1418791757.1280.1280.jpg?c=2)