While observers wait on 10 current "production" models to be tested at the factory, shipped and flown on customer aircraft, Innodyn has completed its preliminary design work on a new product called the TwinPack turbine. The TwinPack bundles two of the company's small lightweight turbines together into a package that fits easily into most engine spaces, dialing-down the extent of firewall-forward reconstruction needed for a turbine refit. The two Innodyn turbines are geared through a common gear box with a total output of up to 500 shp while weighing in closer to 350 pounds ... somewhat similar to a Lycoming 360-series engine (in weight). The engine will be on static display at AirVenture Oshkosh next month, Innodyn says. The company says the TwinPack will provide redundancy and independence of operation between the two turbines, and burn about 35 gallons per hour of fuel. "Our new TwinPack design has generated far more interest than initially anticipated," the company said in a news release. "Testing and refinement will take several months to complete before production deliveries will commence." The TwinPack prototype measures 29 inches in length by 24 inches wide by 14 inches in height and weighs 350 pounds.