SOURCE: Evans Cooling

October 14, 2009 14:31 ET

FAA: Water-Based Coolants Can't Protect Rotax Aircraft Engines Past 120°C

Special Airworthiness Information Bulletin Recommends Waterless Coolants for Protection at Higher Temperatures

SUFFIELD, CT--(Marketwire - October 14, 2009) - Evans Cooling Systems, Inc. (, patent holder and manufacturer of the ONLY commercial waterless engine coolants, found itself the beneficiary of a recently-revised FAA Special Airworthiness Information Bulletin (SAIB) recommending waterless coolants for Bombardier-Rotax (Rotax) 912 A, 912 F, 912 S, and 914 F series reciprocating engines used in aircraft. The Rotax engines are popular in small aircraft and in UAVs, such as the Predator.

The revised SAIB was issued after the European Aviation Safety Agency (EASA) advised the FAA of possible coolant losses and engine overheating on Rotax 912 and 914 series engines. Based on these findings, EASA published AD 2007-0155, dated May 29, 2007, that requires use of a waterless-type coolant if the engine coolant exit temperature will exceed 120° centigrade (C).

The SAIB states that "If you use a conventional ethylene-glycol/water coolant, and engine coolant exit temperatures exceed 120°C, loss of coolant, engine overheating, knocking, and engine damage can occur, which could result in an in-flight shutdown."

Evans waterless coolant has a boiling point above 180°C at atmospheric pressure, providing a wide separation between its boiling point and the operating temperature of the system.

"Evans waterless coolants protect engine metals at coolant temperatures that are well beyond the failure temperatures of water-based coolants by preventing the formation of vapor that insulates hot metal from liquid coolant," stated Mike Tourville, Director of Marketing at Evans.

Evans waterless coolants offer safe operation at elevated temperatures for any internal combustion engine, making possible fuel-saving strategies that include reduced fan-on time. Cooling systems using Evans waterless coolants operate at lower pressure because they do not contain a vapor component. Evans waterless coolant eliminates pump cavitation and cylinder liner cavitation in heavy duty engines.

For more information on Evans waterless coolants, visit the Evans website at, or call +1.860.668.1114.

About Evans Cooling Systems, Inc.

Evans Cooling Systems, Inc., with headquarters and R&D facilities in Sharon, Conn., has focused on engine cooling and related areas for over 35 years. The company has a distribution center, as well as a team of high performance engine cooling experts based in Pottstown, Penn., a heavy duty diesel sales and marketing office in Suffield, Conn., as well as facilities in China. Evans is committed to maintaining a cleaner, safer environment, and continually seeks to improve product and process choices for many heavy duty diesel, high performance and mainstream engine applications. Evans waterless engine cooling technology is used today by numerous fleets, with trials in process at major carriers worldwide., +1.860.668.1114.

Contact Information