BO-105 engine RPM

[nickel]

Hi All,

can someone tell me what is the design RPM of Bo-105 engines?

The information I found are contradicting. Somewhere I read 6600 RPM. On the other hand, somewhere else I found that BO-105 tail rotor rotates with 2220 RPM and has gear ratio 5.24. This makes 11630 RPM at engine shaft.

thanks in advance