the airship you advertised looks a bit wrinkled
I was referring to the Kuzgun 1 unmanned airship....mind you that looks like a tin foil covered balloon!
I thought you meant co-axial by "twin-rotor."
Ah....I just looked at the Flettner Kolibri. saw it it had two sets of rotor blades, and rashly put down twin-rotor!
You can offer us something for your overnight if you want....there's only me and RegDep around. Sorry, take that back, a certain pilot has jumped in!! Morning David.