<p>This study explores the potential benefits of employing an inerter-based absorber on mitigating helicopter ground resonance (GR) instability, where a systematic approach for selecting absorber parameter values that ensure stability is proposed. The inerter is an innovative mechanical element characterized by a force that is proportional to the relative acceleration between its two terminals, which has been illustrated to be effective in vibration suppression of various structures. A dynamic model that accurately represents helicopter GR instability is developed. Stability analysis is performed to evaluate the influence of these suppression devices on the regions of instability concerning rotor speed and damping values of the devices. Additionally, the implications of torsional stiffness are analyzed, leading to the identification of a range of parameter values that guarantee the helicopter’s immunity to GR instability across its operational rotor speed spectrum. The findings indicate that the implementation of the proposed inerter-based device yields superior performance in terms of damping robustness compared to conventional lag dampers for all the considered torsional stiffness, where the required minimum damping value to ensure the helicopter is free from GR instabilities can be reduced by up to 10.5 % and at least 7.9 %.</p>