The Viperjet and IQ-Hammer 90 turbine are a great match. This turbine packs a lot of power in a small and lightweight package with over 20 pounds of thrust. Acceleration is quick and smooth, and throttle response is surprisingly linear. Components and installation are pretty standard compared to other turbines, and the electronic control unit (ECU) handled all operations without any problems. Our unit never missed a start or produced any wet starts. One interesting feature is an automatic fuel pump voltage calibration that takes place on every engine run. A few seconds of full-throttle running (normally accomplished on the take-off roll) sets the pump voltage necessary for maximum rpm and thrust for the given conditions.
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