Hi Guys,

Essentially this is the only real way to do it, material removed from between the compressor blades like this is very common and an accepted practice, balancing engines as an assembly or "core" is a good way to get a very good result, although Wren have been able to get good results with their engines using the rotor only method. An experienced balancer will know where to remove material so as to not weaken the assembly, it's better to spread the mass removal over a larger area rather than a large mass from a small area. All the better engine manufacturers use this technique, Jet-Cat, Jet Central, Kingtech, AMT, Behotec etc...the larger the diameter of mass removal the less material has to be removed compared to closer to the hub.

There's no need to disassemble the rotor after balancing which allows the recorded result to not be disturbed. A "rotor only" balance requires the assembly to be disassembled thus disturbing the result. A very good balance job can be obtained using this technique. The method Chrigui is using is spot on..!

Cheers,
Smithy.