Aircraft: Rotary Wing

3 engined heavy transport... held the distinction of being the most powerful helicopter to be built in Europe at one point, as well as being the world's fastest helicopter. Wikipedia

" The Bell 206B JetRanger is one of the most popular general purpose helicopters ever built. It is a single pilot, five-place, single-engine light helicopter. The JetRanger has tubular steel landing skids and can be equipped with pop-out or fixed floats for water operations." - from Microsoft Flight Simulator 98.

"Four-blade, single-engine, civil utility helicopter. A derivative of the Bell 206L-4 LongRanger, the 407 uses the four-blade, soft-in-plane design rotor with composite hub developed for the United States Army's OH-58D Kiowa Warrior instead of the two-blade, semi-rigid, teetering rotor of the 206L-4. Wikipedia"

"The 47 became the first helicopter certified for civilian use on 8 March 1946." - Wikipedia

"The United States Army first ordered Bell 47s in 1948 under the designation H-13. These would later receive the name Sioux." - Wikipedia

Premiere US helicopter gunship.

"A twin-engine, tandem rotor heavy-lift helicopter. It is a modernized version of the CH-47 Chinook and its primary role is the transportation of troops, vehicles and cargo. The Huron exists in two variants: the armed variant with two side gunners manning 6.5 mm gatling guns, and the transport version which replaces the gunners with two additional passenger positions."

Single-seat intermeshing rotor helicopter, or synchropter | world's first series production helicopter. Wikipedia

"Black Shark" Soviet single-seat attack helicopter... coaxial rotor system- Wikipedia

Largest helicopter to have gone into serial production. Wikipedia

Electric commuter plane with VTOL capability.