The engine on the left is a Challenger V8. The airplane engines are made from bar stock and the engine on the far right appears to be a Nanzy. The Nanzy is a vertical engine, with castings formerly offered by Breisch/Peters. The engine castings are now available from Bob Herder back in NJ. http://bobherder.tripod.com/ > Bob doesn't have the Nanzy on there yet, but you can get his phone & email from the webstie.