Society of Automotive Engineers

Popular Rotorcraft Association (PRA) Popular Rotorcraft Association (PRA)- The PRA is an organization of rotorcraft enthusiasts, engineers, designers, builders, fliers, and local chapters. Vietnam Helicopter Pilots Association (VHPA) Vietnam Helicopter Pilots Association (VHPA)- The VHPA is a non-profit war veterans organization. It is dedicated to the helicopter pilots who servered in the Vietnam War. Helicopter Association International (HAI) Helicopter Association International (HAI)- Since 1948, HAI has been dedicated to promoting the helicopter as a safe and efficient method of transportation, and to the advancement… Army Aviation Heritage Foundation (AAHF) Army Aviation Heritage Foundation (AAHF)- Dedicated to presenting the Army Aviation story to the American people through transportable flying presentations and static displays of … AHS International - The Vertical Flight Society AHS International - The Vertical Flight Society- The professional society for the advancement of vertical flight technology and its useful application throughout the world.