RO - Rotorcycles

Model Designation Manufacturer Engine(s) Crew Other
XROE-1
Hiller 1 Nelson H63B 1
XRON-1
Gyrodyne 1 Nelson H-59 or 1 Porsche or 1 Solar 1 XHOG-1
YRON-1
Gyrodyne 1 Nelson H-59 or 1 Porsche or 1 Solar 1