For those who are interested, the helicopter is an MD-500. They're well known for being very stable and have pretty good control feel through mechanical-only l

For those who are interested, the helicopter is an MD-500. They're well known for being very stable and have pretty good control feel through mechanical-only linkages. As such, they're fairly popular for this kind of precision work. Another big application is aerial tree trimming: https://www.youtube.com/watch?v=OXcIqR01_d0 https://www.youtube.com/watch?v=OXcIqR01_d0