Nov 12 (Reuters) - Japan's Mitsubishi Heavy has suggested significant cost savings as part of a behind-the-scenes proposal to Boeing to build the wings of its next jetliner in Japan, a person with knowledge of the proposal said. Mitsubishi Heavy, which already makes wings for the 787 Dreamliner, has outlined to Boeing in detail how a new plant could be built alongside its existing 787 wing fabrication facility in the Japanese port city of Nagoya, the person said. It has also presented a detailed blueprint that sets out significant cost savings by transforming the way in which the advanced carbon-composite wing panels are transported. According to the person with knowledge of the plan, Mitsubishi has proposed building a fleet of five 'Roll On-Roll Off' cargo ships capable of transporting sections of the 777X wing, which would be the longest Boeing has ever commissioned. This would be significantly cheaper than the current system of outsized "Dreamlifter" aircraft used to transport 787 wing panels, according to the person familiar with the proposal.
Mitsubishi already builds the 787 wings. And with the addition of the 777X wing you get both production experience and cost savings. The ocean fleet Mitsubishi proposes to transport the wings
will lower costs of transport on both the 787 and 777x wings.