three blade intermesher helicopter

This is an animation of a three blade (per mast) intermeshing helicopter rotor system. Most intermeshing designs, such as the Flettner 282, the Kaman H-43 Huskie and the Kaman K-1200 Kmax are two-blade designs that use a teetering rotor hub. In the late 1940's the Kellett Autogiro Corporation designed and flew the XR-8 and the XR-10 and these were both three-blade intermeshing helicopters with fully-articulated rotor rubs. The animation in this video is modeled after the XR-10. Link to CW Bayer's tribute to his father who test piloted the XR-10 https://www.nevadamusic.com/?page_id=1901 Videos of the XR-10 in flight https://www.youtube.com/watch?v=pl9IiVf4Vs0&t=68s https://www.youtube.com/watch?v=Eo83mmsGabw Images used in this video FL-282 https://commons.wikimedia.org/wiki/File:Flettner_282_airborne.jpg H-43 Huskie Helicopter https://commons.wikimedia.org/wiki/File:HH-43B_Huskie_at_Cam_Ranh_Bay.jpg https://upload.wikimedia.org/wikipedia/commons/c/cb/HH-43B_Huskie_at_Cam_Ranh_Bay.jpg USAF (Released to Public), Public domain, via Wikimedia Commons K-1200 Helicopter https://commons.wikimedia.org/wiki/File:Kaman_K-1200_Rotex.jpg https://upload.wikimedia.org/wikipedia/commons/5/50/Kaman_K-1200_Rotex.jpg André Völzke, CC BY-SA 3.0, via Wikimedia Commons Kellett XR-10 Helicopter https://en.wikipedia.org/wiki/Kellett_XR-10#/media/File:Kellett_XR-10.jpg