Low Bypass Micro-Turbofan Engine and Hello

Dear Forum

First, thank you for allowing me to join this forum. This is my first post.

My question is: Does anyone know what the smallest Low Bypass Micro-Turbofan Engine is that has been produced to power a UAV? I ask because I imagine the worlds of jet powered UAVs and RC hobbyist jet powered aircraft are starting to overlap. I also imagine that this will cause increased regulation in both sectors. I also imagine the hobbyist will lose to regulatory restrictions.

Sincerely
Bill