Hi all, Last week I sent this message, but there was a problem with my subscription. So: here we go again.
From: Coert Munk <[EMAIL PROTECTED]> To: Ercoupe info <[EMAIL PROTECTED]> Subject: NOISE CERTIFICATES Date: vrijdag 13 november 1998 10:12 (UTC+1) Dear all In our country (the Netherlands) as well as Germany and other W-European countries, the authorities are working on noise certificates for all aircraft. Based upon the noise production, an aircraft might be banned from the air at certain times near the more dense areas. These noise certificates are based upon ICAO standards. Is there any information available on the noise production of the various Coupes, both the Ercoupe, Alon, Forney and Mooney types? The measurements can be in accordance with ICAO Annex 16 Chapter 6 (when the noise production of all aircraft is measured during straight and level flight (75% cruise power) at 950ft or in accordance with ICAO Standard 16 Chapter 10 (measurement during t/o at 2,500 meters from the beginning of the runway and the a/c flying full power at best climb speed). Just let me know, the information is necessary for deciding if I should add an (extra) silencer in the exhaust pipe. By the way, are there any STC's known on such modifications? Looking forward to your reactions. Kind regards, Coert Munk Ercoupe 415CD s/n 4765 reg PH-NCE ----------------------------------------------------- Addition of today: I just found information on the ww-net from the LBA (German FAA): Erco 415D/E/F1A C90 engine and McCauley 1B90 prop, indicating 69,8dB(A) according to Ch.X
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