The Hansen Solubility Principles and its relation to varnish Have you ever heard about the Hansen Solubility Principles? This model was originally developed to predict the solubility of polymers in solvents. There are three parameters used in this model, namely; *Polarity (dp) *Hydrogen bonding (dh) *Dispersive forces (dd) These parameters make up the 3 dimensional […]
Why choose RULER? Lubricants degrade throughout their lifetime. As part of condition monitoring, we typically employ several types of oil analysis tests to help us better understand the rate of degradation or guide us towards finding the root cause of degradation. However, with so many oil analysis tests on the market, how do we choose […]
Is it Thermal Failure or Oxidation? Quite often, when any type of deposit occurs in a lubrication system, the first assumption is that there is varnish in the oil. Typically, this is followed by the next assumption that oxidation caused this varnish. On the contrary, many types of deposits exist and each nature of deposit […]
Establishing the Optimum Oil Sampling Frequency for Helicopter Engines Helicopter engines undergo rapid changes in temperature and depending on where they’re flying can move from a moderately warm atmosphere to a colder one. Additionally, the actual engines can experience temperatures in excess of 140°C during operation or even 250°C when hot spots occur. These variances […]
Monitoring Degradation in Aircraft Lubricants Equipment failure in any industry has negative impacts. Within the aircraft industry, the consequences and risks associated with failure can triple. However, if military operations are now added to the mix, these risks of failure have increased exponentially! In this blog, we take a look at ways of monitoring the […]
