
The world’s only three-engine Boeing 757, a Honeywell multi-product test bed that in addition to its two big turbofans sports a turboprop engine under development.
Photo by Jim Koepnick

The world’s only three-engine Boeing 757, a Honeywell multi-product test bed that in addition to its two big turbofans sports a turboprop engine under development.
Photo by Jim Koepnick