KIEV, June 9 - Ukraine and Russia seek to invite Western investors to help resume mass production of an upgraded model of An-124-100M-150 Ruslan, the world??™s largest heavy cargo aircraft, a Ukrainian designer of the aircraft, said.

Oleksandr Kiva, the deputy director general at Antonov, an investment of about $400 million is required to build between 30 and 40 aircraft to meet increasing demand for cargo shipments.