https://www.space.com/3163-heavy-lift-helicopter-inspires-nasas-mars-lander.html
Heavy-Lift Helicopter Inspires NASA’s New Mars Lander | Space
Nov 29, 2006 - If NASA’s 2009 Mars Science Laboratory (MSL) reaches the red planet’s surface in one piece, the agency will owe a debt of gratitude to the Sikorsky S-64...
heavy lift helicoptermars landerinspiresnewspace