TMU-27/M LOX Cart Note: This item is currently in storage. The TMU-27/M 50-gallon liquid oxygen (LOX) tank was used to refill aircraft LOX systems (for crew breathing at high altitude). This type of cart entered USAF service in 1969 and also was designed for use with argon and nitrogen. The use of liquid oxygen as a source of breathable oxygen was introduced in the late 1950s as a means of saving space and weight over the gaseous oxygen systems then in use in Air Force aircraft. While LOX can be serviced at much lower pressures than those required for gaseous oxygen systems, it does require special equipment and handling. It reacts violently with many substances, including some found around aircraft. Thus, for safety reasons, normally only one maintenance person at a time handles the LOX refilling operation. Donated by the Avco Corp. Click here to return to the Featured Accessions index.