Originally Posted by
n5296s
... you only have to look at the US which does permit single-engine flight over cities and has many single-engine aircraft in public safety roles.
Or at South Africa for example.
Originally Posted by
n5296s
... I don't see a huge number of accidents due to single engine helis making unfortunate forced landings in congested areas and taking out primary schools / kitten farms / whatever, or even the crew.
Again anecdotally, the main cause of heli fatalities in the US seems to be flying in inappropriate conditions. You could have eight engines driving four independent rotor systems and it wouldn't help with that.
Same experience in South Africa.
Originally Posted by crab
Any clues there as to why some authorities might choose to limit singles over cities.
That is quite obvious: The large manufacturers of twin helos successfully lobbying the authorities in order to get a bigger share of the public wallet.