Even in smaller cities, the multi-storey car park makes pretty much an ideal vertiport: bus station on the bottom, car parking in the middle, helicopters and VTOLs on top. Easy enough to implement, but doesn't do anything to get around the economic difficulties of VTOL operations.Kadija_Man said:In London, you had the Isle of Dogs which would have provided land for a dedicated heliport. Other cities had such areas of land which were no longer being used for their original purpose. However, you're concentrating on Western Europe. In Asia, the Rotodyne would have found considerable use, while Downunder it could have also been used as a regional airliner. In the US, a similar situation existed. Plenty of tall buildings with flat roofs there! In Western Europe it's greatest enemy would have been the VFT.
IMHO, a smaller Rotodyne in the Gannet/Sea King size class, with a twin Mamba or similar, would have been ideal - reasonably large market for ASW and transport, both roles which would benefit from a Rotodyne. An attack variant to the AAFSS requirement would be rather interesting.