VITYAZ TRANSPORTERS By 1985, an intensive research and development program to create a family of what is known to be the Vityaz two-unit CTVs had been completed. This family includes: ? two-unit transport vehicles DT-10, DT-20 and DT-30, with a load-carrying capacity of 10, 20 and 30 tons,. Find other cool mechanics videos at www.MechanicsHub.com. Also connect with other mechanics, find Mechanics Jobs, Games, Trade News and more.