THE BLACK EDITION™ ENGINE OVERHAUL PROCESS:

THRUST VELOCITY LOAD TESTED

Watch the video ! (movie length - 1.5 minute)

Completion engine testing is the most rigorous procedure used anywhere in the world. Victor has a "one-of-a-kind", state-of-the-art engine test apparatus (nicknamed "Big Red") that measures and records all engine operating parameters, including engine real-time thrust velocity output without installing a water brake dynamometer on the engine. We don't recommend the use of water brake operated dynamometers on aircraft engines due to the lack of velocity load on the engine bearings and crankcase and possible risk of premature internal engine lubrication problems.

The engine is installed into a hydraulic cradle that flexes under torque and records the actual pulling force of the engine and propeller combination just as it would in an actual aircraft with accessories and exhaust system installed. A special flouresant dye is installed into the oil system throughout the test. Under a black light and canopy, the engine is stressed to detect the most minute oil leaks.

Through the use and installation of tri-axial piezoelectric accelerometers, technicians are able to monitor and measure the engine's internal vibration levels. Any parts that move at a different speed as compared to the running speed of the engine are detected via the use of a Full Domain Frequency Analysis. This analysis is important, because we perform a comparative computer overlay to determine if any specific part is producing a vibratory pattern in excess of perfect "real-time balance limits".

This is a mobile apparatus (MTA) designed to run engines at full load with the actual propeller and accessories installed. The complete engine test run process typically requires an average of two workdays. The MTA was created by Victor Sloan with the engineering guidance of former X-15 Rocket Pilot and Propulsion Engineer Scott Crossfield. No other company in the world takes such extreme measures to insure proper quality control.

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