has a research lab at Lewis Field in Cleveland Ohio where they are doing research into ultra high bypass for aircraft. We had a conversation with the UHB Research program Manager, Chris Hughes. He explains what the program is doing and which technologies they are evaluating. Coming up for repeated mention are two engine approaches, unducted fans and geared fans. Of these two, the geared approach is much closer to reality – even though UDF engines were around years ago being tested.

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