Aircraft Overhaul Engine - Black Editions

Thermally Electrostatic Gloss Black Powder Coat

This F.A.A. accepted process is a dry organic compound coating in which electro statically charged particles of special resins and pigments are applied onto the crankcase, sub-assemblies, intake system, housings and related components. The engine’s crankcase and components are meticulously prepared, pre-assembled by Victor’s technicians, then heated and degassed in preparation for powder coat application. Then the positive charged particles are pneumatically sprayed and adhere to the negatively charged part’s surfaces and finish baked in a curing oven at 400 degrees Fahrenheit to form an extremely tough durable surface. In effect this fuses the premium formulated powder to the components filling the rough, porous surfaces to prevent aluminum oxide corrosion, reduces surface fatigue cracking and improves heat emissivity.

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Enhanced Valve Train Geometry

Extracting maximum performance from the valve train is essential for best power, smoothness and longevity. As an engine’s valves open and close, the contact angle between the valve and the rocker arm becomes critical to proper valve operation and engine performance.

Any valve side loading can decrease cylinder efficiency and reduce available horsepower. Victor’s Black Edition® V Engines are precision machined for minimum valve side loading for better power, performance and reliability. To help achieve consistency, valve spring pressures and heights are matched for more efficient engine operation. The hydraulic lifters and camshaft are matched for identical bleed down rate timing to assure uniformity of independent valve overlap and maximum throttle response.

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Reciprocating and Rotational
Engine Balanced

Engine thrust may be increased by reducing the amount of power wasted in attempting to offset counterbalancing forces induced by out-of-balance internal components. Improving parts balance allows the engine to deliver more power to the propeller and the engine becomes more efficient with less wear on internal moving parts. “Power-By-Victor” Black Edition V Engines are uniquely real-time motion balanced by Victor’s A.S.E certified master machinists to within one gram.

With this F.A.A. accepted process, individual parts and cumulative reciprocating mass weights are balanced, to provide for the best longevity and smoothness of the engine. Balancing not only improves thrust but also reduces pilot and passenger fatigue by lowering the amplitude of various vibration frequencies generated by the engine.

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Precision Three Axis
Crankcase Testing

When necessary crankcases are straightened, then precision milled and final machine bored utilizing precision boring equipment to assure proper alignment and size.

The journals are also finish tested for size and journal geometry by airflow differential procedures to assure a precision fit of the bearings to crankcase halves. This procedure minimizes piston side loading, reduces bearing wear and provides equal loading on crankshaft main journals.

This line boring process reestablishes the centerline of the crankshaft axis, thereby insuring the centerline is parallel and equidistant to the cylinder deck planes for enhanced engine performance.

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Engine Thrust Velocity
Load Cell Tested

Engine testing at Victor Aviation is the most extensive procedure used in the industry and performed over a several day cycle process. Victor’s state-of-the-art mobile engine testing apparatus, incorporates a thrust velocity load cell that measures the actual thrust force of the propeller. Engines are installed into a hydraulically activated engine mount, with engine accessories, induction system and exhaust system installed, to simulate real-time engine test parameters. Using an electronic load cell wafer, the engine’s real-time thrust velocity is recorded at all engine speeds.

During the test process special dyes are put into the oil system and examined under a black light canopy to detect for any discrepancies. Engines are tested at maximum power and must meet Victor’s rigid test standards assuring the highest level of quality control.

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Matched Camshaft
and Hydraulic Lifters

A hydraulic valve lifter is a device that converts the rotary motion of the lobes of the camshaft to linear motion to actuate the engines valves while taking up the slack in the valve train.

Valve train clearances change with temperature as the engine heats up and cools down, so the hydraulic lifters have to constantly compensate for thermal expansion of the crankcase, cylinders, pushrods, valves and other valve train components.

By the precision matching of hydraulic lifters with identical bleed down rates to a properly profiled and matched camshaft assembly, Victor's technicians can assure uniformity of independent valve overlap timing and maximum throttle response. This allows for smoother engine operation, improved fuel efficiency and increased engine performance.

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Diamond Cut and
Matched Piston Rings

Precision machining and matching piston rings can create a power advantage by maximizing dynamic engine compression while still maintaining good oil control. This involves both proper ring selection for the intended use and diamond cutting machining procedures when gapping your rings.

Piston ring sets come pre-gapped from the parts manufacturer and are not matched to precision fit a cylinder bore. That simply isn't precise enough where gaps should be accurate to within 0.001 inch or less for best engine power.

Victor's technicians precision match piston rings to each individual cylinder bore using highly specialized diamond cutting and finishing techniques to close tolerances. This process assures better cylinder compression and enhanced cylinder performance.

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