B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Confusion; Workload; Human-Machine Interface; Situational Awareness
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Aircraft; Airspace Structure; Procedure
I was the Pilot Flying doing the BANKR2 STAR into CLT. Because of the very steep descent profile and little distance to make altitude restrictions; the aircraft increased speed beyond published speed restriction of 250 knots after DEBBT. In trying to make restriction; I did not inform the Pilot Not Flying to tell ATC of our inability to do both; slow and make altitude restriction. The BANKR2 STAR is poorly designed and very difficult for aircraft to fly as published in VNAV. The altitude restrictions are too many and varied; short distances between waypoints and unrealistic speed restrictions. We were given a more achievable STAR initially and then offered the BANKR2. I should have looked at it carefully and seen the possibility of difficulty making the restrictions. Won't do this STAR again in its present form.
B737 pilot reported their aircraft was unable to meet altitude and speed restrictions published on the CLT BANKR2 STAR.