Rolf R Bakke | Heavy-Lift HexaCopter Fast Forward Flight With 4kg Payload @RolfRBakke | Uploaded January 2011 | Updated October 2024, 13 hours ago.
More info here: rcgroups.com/forums/showthread.php?t=1372744
More info here: rcgroups.com/forums/showthread.php?t=1372744