WESTERN Australian-based Orbital Engine Corporation sold 20 revolutionary orbital-engine cars to the federal government this week, 10 years ago, for use by its car fleet manager, Dasfleet. The 20 Ford Festivas were the first vehicles sold using the new technology, which eliminates about 200 parts normally found in a standard four-stroke engine by replacing them with a two-stroke engine with a cylinder head. Costing Orbital $75,000 to develop, Dasfleet has paid just $20,000 for the cars which reportedly deliver 25 per cent better fuel economy, and increased performance.