Power-run with Ron Ballard of Wren Turbines USA and his FANTASTIC Cessna 425 powered by twin Wren Turbines 44 K Turboprop engines. The Wren 44 K Turboprop engines feature Kero-Start, 10 mm prop-shafts, the latest Zicoy ECU's. and a magnetic pump that has no seals that can wear out or leak with use. Must admit.......what a sound!
More information about the Wren 44 K Turboprop engine is available here: http://www.wrenturbines.co.uk/turboprops/wren-44-K-turboprop
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Wren Turbines Usa - Wren 44 K Turboprop Power Run - Jet Engine