[bugmenot]

http://web.archive.org/web/200804140...Lavochkin.html
http://web.archive.org/web/200707031...ltilt/wep.html

"There is some contradiction with first hand Czech pilot accounts of flying the La5FN during May 1944. These quite clearly state that augmented power derived from revving over 2400rpm to 2500 rpm was only available from take off and only sustainable for a period of upto 2 minutes immediately after take off."