Slightly off topic but if you are looking for a cabinet of curiosities for aircraft, visit the Hiller Aviation Museum in San Carlos, California. It has a collec

Slightly off topic but if you are looking for a cabinet of curiosities for aircraft, visit the Hiller Aviation Museum in San Carlos, California. It has a collection that includes some truly marvelous flying machines. My favorite is a collapsible helicopter that folds up into a duffel bag for transport. [0] It was designed to be airdropped to pilots downed behind enemy lines. The pilot was meant to assemble it and fly back to safety. It could fly but not well enough to see actual service in combat. [0] https://en.wikipedia.org/wiki/Hiller_ROE_Rotorcycle https://en.wikipedia.org/wiki/Hiller_ROE_Rotorcycle