The third turbine is a turbocharger-based engine, built to experiment with different fuel types and combustion chamber designs. They ve got an Antonov AN22 on exposition, the world s largest turboprop aircraft. It is propelled by four turboprops, each one producing 15,000hp and driving two counter-rotating properllers of 6m diameter. This rotor on display is the low pressure turbine rotor from a large powerplant. They show the same compressor spool, though I don t know which engine this originated from.
Diameter is approx.
This page contains LOTS of pictures, so please be patient while loading. If someone is interested in larger pictures or more information, he is welcome to ask. Related sites that I enjoyed very much and that have been very stimulative to my work. He maintains one of the most complete collections of links to similar pages. I consider this as probably the best site on small commercial gas turbines on the whole web.