Editing Paper plane (section)

===Paper helicopters (autogyros)===
The world's first known published paper autogyro (engineless helicopter) by Richard K Neu appeared in "The Great International Paper Airplane Book" published in 1967. Its wings fly in a circle around a central ballast shaft as it descends vertically.<ref>Jerry Mander, George Dippel, Howard Gossage (1967), "The Great International Paper Airplane Book", {{ISBN|978-06-7121-129-5}}</ref> This basic design has been published several times and is widely known.{{citation needed|date=December 2024}}

The world's first known published forward-gliding paper autogyro with forward-pointing body lifted by spinning blades was built by James Zongker. It appears on page 53 of "The Paper Airplane Book: The Official Book of the Second Great International Paper Airplane Contest" published in 1985 by Science Magazine. Its twin contra-rotating blades automatically spin on paper axles upon launch to provide lift.

E.H. Mathews developed a flight-stable paper model helicopter known as the Papercopter. This has a ring wing, and flaps for adjusting for flight for stability, positioned on the inboard edge of the ring. While not an autogyro per se, this paper model aircraft class falls within the general design of a paper model helicopter, and does possess a rotational flight element producing lift during forward flight. Papercopters, as Professor Mathews labeled them, are unique among paper model rotorcraft in having a range and velocity far in excess of all other classes, able to fly quite quickly, and with a range of between 10 and 15&nbsp;m. The longest flight time is 27.9 seconds.<ref name=Toda>{{cite news|last=Ryall|first=Julian|title=Japanese man sets record for paper plane flight|url=https://www.telegraph.co.uk/news/worldnews/asia/japan/5344958/Japanese-man-sets-record-for-paper-plane-flight.html|access-date=15 October 2012|newspaper=The Telegraph|date=18 May 2009}}</ref>