Flying in the high altitudes requires the flight operators to concern about the different specifications of the cooling of the engines which can be dangerous. Under such circumstances the fuel system icing inhibitor will help in the avoiding of the freezing of the fuel. This is also called as Prist that are mostly used in the Jet aircrafts. The Jet aircrafts have small amount of water that is suspended in it. In order to avoid the water from freezing the aircraft manufacturers will add some kind of fuel in it to cool the engine oil and to maintain the heating of the jet fuel. 

As a measure of protection the Prist is added to the fuel and there is a limited ratio in order to mix it in the fuel and normal ratio is 10 % to 15 % by the volume. There are Skytec products that are used mostly for helicopters. These are the manufacturers of high quality aluminum upgrade parts for RC helicopters. There are different kinds of Skytec that will help in the aviation process. The CW-1 makes use of the acoustic filter resonant with a loud speaker in an enclosure. The frequency change can be done as desired.