That needs high average handle force and a long stroke: about 50kg and 1.2m net length.By no means at 65 almost 66 do I expect to do the 2 minute pace for long periods of time at 17 S/M . I just wanted to know how it is possible .
At rating 20, 50 x g x 1.2 x 20/60 = 196W, almost 2 minute pace. Note the Watt/Rating ratio: almost 10. This is the amount of Work in the stroke.
There's only one thing to learn in rowing: how to pull a big stroke with the right sequence. Once we have that stroke, we can train by pulling plenty of them. Typical work is 3 or 5k, or 30 minutes, or 5 minute intervals.
If you have a big stroke, you won't need to rate more than 21-22 to train endurance. This is typical of rowing (and erging). Boats and flywheels don't stop between strokes, so we let them go, and rest enough to make the next stroke a big one.
See the C2 technique page: https://www.concept2.com/indoor-rowers/ ... que-videos