A build from 11 years ago, as promised more autogyros:
What is an autogyro?
This unlucky cousin of the helicopter enjoyed a brief and well deserved moment of glory during the 30’s and for no reason its popularity dwindled.
The Kellett K-2 had a Continental engine, while the K-3 had a 5 cylinder Kinner. The subject of this article started its life as a K-2 but was later given the Kinner. There were many other Kellets K-2s and K-3s: one went to Japan, another to Argentina, and the rest vanished in the mist of time save one restored airframe that now is in a museum. Coincidentally it has the same registration that my model.
Scratch-building is indeed easy; the only issue is that is difficult.