See also

• Sound barrier
  Sound barrier
  The sound barrier, in aerodynamics, is the point at which an aircraft moves from transonic to supersonic speed. The term, which occasionally has other meanings, came into use during World War II, when a number of aircraft started to encounter the effects of compressibility, a collection of several...
  
  

External links

• Eric "Winkle" Brown talks about the M.52 in 2008
• Museum of Berkshire Aviation: "The M.52 Story"
• Article: The Aeroplane Spotter, 19th October 1946 "High Speed Research" (pdf download)