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Rotorcraft Propulsion System Hybridization for Enhanced Safety and Performance

Peter Giannola, EDG Engineering LLC
Gerry McCann, Mechatronic Machine LLC
John C. Ho, Expert
Mars Chan, DOER Marine

May 10, 2022

https://doi.org/10.4050/F-0078-2022-17609

Abstract:
Herein, the case for hybridization will be made, primarily as a means for enhancing safety. Utilizing a case study of a popular light turbine helicopter, it will be shown that augmentation with a parallel hybrid electric system, under two critical operational failures, safety can be significantly enhanced. Conceptual design of two powertrain architectures for parallel turbine-electric hybrid propulsion systems will be examined in sufficient detail to quantify their relative impact in comparison with the existing conventional turbine-only powertrain. Initial trade studies were performed to minimize system weight, utilizing current state-of-the-art components and technology. Commercially available motors, inverters and battery systems were selected for the study. Two architectures were chosen and exercised for three operational scenarios: requirements for 2.5 minutes of emergency power, 5 minutes of emergency power and 10 minutes of emergency power at takeoff/climb power level. Relative cost and benefit are quantified by performance impacts including payload capacity impact, range, rate of climb, and high-altitude performance for the different sized battery packs required for each of the 3 emergency power durations. The key benefits are safe recovery from two serious failure modes: inoperative engine and main gearbox failure. The rough "performance cost" for this safety-enhancing modification is a loss of about 1/3 of the nominal useful (passenger + baggage) payload, assuming full fuel capacity operating at maximum gross takeoff weight.


Rotorcraft Propulsion System Hybridization for Enhanced Safety and Performance

  • Presented at Forum 78
  • 7 pages
  • SKU # : F-0078-2022-17609
  • Propulsion II

  • Your Price : $30.00
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Rotorcraft Propulsion System Hybridization for Enhanced Safety and Performance

Authors / Details:
Peter Giannola, EDG Engineering LLC
Gerry McCann, Mechatronic Machine LLC
John C. Ho, Expert
Mars Chan, DOER Marine