> All my Ercoupe > manuals say to "Avoid Continuous operation between 1850 and 2020 rpm with > McCauley 1A-90 propeller. The reason for this is: that rpm range causes a > natural critical frequency of vibration that can cause severe damage if it > is maintained. > I remember years ago I bought a new McCauley "Clip Tip" prop for my > Aeronca Champ which had a Continental A-65 engine. When the prop was > installed we had to put a placard on the instrument panel saying to avoid > this rpm range (because of bad vibrations).
I found the service bulletin and I've posted it for all to see. So go out there and peel those placards off and fly! http://members.aol.com/cooperjr/McCSB13.htm JC --------------------------------- to unsubscribe send mailto:[EMAIL PROTECTED] _________________________________________________________ Enlighten your in-box. http://www.topica.com/t/15
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