Claude,


I wrote [link=http://www.rcuniverse.com/forum/m_1850473/anchors_1850473/mpage_1/key_Tapered%252Dbore%252Cbreak%252Din/anchor/tm.htm#1850473]this thread[/link], about break-in, which from my POV it is a bit more precise and detailed.

It also gives a better explanation about all the 'why's.

Follow it! You can easily do it with the #3246 tuned silencer and use a 9x6 APC, which can be cut down a bit, at the tips, to 8.5x6.

Don't use a Master Airscrew prop. The RPM limit for this size is exceeded by this engine.