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These engines were designed to have a total-loss lubrication system, with the motor oil held in a separate tank from the fuel in the vehicle, and not pre-mixed with it as with two-cycle engines, but mixed within the engine instead while running. Castor oil was often used because it lubricates well at the high temperatures found in air-cooled ...
Motor oil, engine oil, ... total-loss oiling is a design option that remains popular in small and miniature engines. ...
The Noack volatility test, named after Kurt Noack, [1] determines the evaporation loss of lubricants in high-temperature service. This test is standardized as ASTM D5800. [2]In this test, a sample is heated at 250 °C for 60 minutes with a constant flow of air over it.
Fuel oil in the crankcase lube oil can cause the oil to chemically degrade. This means that the oil loses viscosity and is less effective when lubricating. [5] The loss of viscosity of the lube oil causes the oil to not fully connect and lubricate the moving parts of the engine.
En route back to Miami, low oil pressure lights for engines #1 and #3 illuminated, [6] and the oil quantity gauges for all three engines read zero. [7] At 09:23, Flight 855 informed Miami ARTCC of the engine gauge readings but stated, "We believe it to be faulty indications since the chance of all three engines having zero oil pressure and zero ...
At low speeds, gasoline engines suffer efficiency losses at small throttle openings from the high turbulence and frictional (head) loss when the incoming air must fight its way around the nearly closed throttle (pump loss); diesel engines do not suffer this loss because the incoming air is not throttled, but suffer "compression loss" due to use ...
Diesel engine runaway is an occurrence in diesel engines, in which the engine draws extra fuel from an unintended source and overspeeds at higher and higher RPM, producing up to ten times the engine's rated output until destroyed by mechanical failure or bearing seizure due to a lack of lubrication. [1]
Gases (6) are returned to the engine sump. Pressure pump (4) forces the de-gassed and cooled oil (5) back to the engine's lubrication points (7). A dry-sump system is a method to manage the lubricating motor oil in four-stroke and large two-stroke piston driven internal combustion engines.
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