“There will be four test cells, each of which is designed to do certain specific kinds of tests. By
the use of these cells, supplied by the air-conditioning plant, it will be possible to subject the
largest aero engine contemplated to tests on the ground, simulating flight at over 2,000 m.p.h. at
very high altitudes. We shall have at last a piece of development equipment which will make it
possible to reduce by many months the time required to produce a new engine; a piece of equipment
which will mean that our pilots will not have to stake their lives on an engine until it has been
subjected to proving tests far more thorough and comprehensive than anything that has been possible
in the past.”