I think he was referring numbers with after burner. How is it possible to start TF10000 without getting right numbers at TF6000? I think they reached %10 better numbers.
I don’t remember Dr Aksit ever mentioning a 3700lbf being reached. I followed most of his interviews.
When they first got the TF6000 ready, he said that in the first firing tests they may not reach the 6000lbf target. But he said it should be 3500 or more. As the engine matures the thrust levels will increase. This was before first ignition though.
Then he said, as per
@boredaf ’s post, it has surpassed the thrust levels of the engine KE prototype used.
He also mentioned that TF6000 and TF10000 are different engines.
Because TF6000 doesn’t have afterburners it would be built to a specific constructional standard.
TF10000 will have afterburner. You can’t put an afterburner on TF6000. Because with a sudden thrust increase the engine may collapse. Parts will have to be manufactured to a higher standard.
There is no need to manufacture TF6000 to that standard for cost reasons.
That is why Honeywell have F124 and F125. ( non AB and with AB comparable turbofans)
And, that is why we are calling ours with separate names.