The primary failure mode must have been the spider bearing breaking the connecting rods, so they redesigned to eliminate it. Sounds like they assumed this was the only problem.
Four months later and they haven't gotten the engine to survive the 200 hour durability test yet. Now they've identified water lubricated bearings as the main problem to overcome (e.g., pages 19, 30-32).
They said they designed a bearing test machine and were going to build it with Cyclone, but nothing appears to have happened afterwards on that.
So, show stopping problem #1: Spider bearing breaks connecting rods.
Show stopping problem #2: Water lubricated bearings don't work.
That was proven two years ago by Ohio State engineers.
When Harry designs the new Mark 1 and Mark 3 engines to save the company, what does he do? Puts in spider bearings and water lubrication.
You'd think Frankie, with all her talk of a business plan focused on bring product to market and generating cash flow, would tell Harry to cut the losses on his inventions and to make an engine that has a chance of working.
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