wrangler5 wrote:
Flight testing will show whether the theoretical benefits show up in the real world. As well as currently unidentified problems. I wonder, for example, about the cost/convenience of maintenance on top mounted engines as compared to those slung under a wing. My impression is that radical new designs often, if not usually, have unanticipated problems.
That’s an interesting question about top mounted engines. Though the B727, DC10 and Lockheed L1011 had top mounted engines, or at least engines that were close to being top mounted.