Some SE helicopters have dual hydraulic systems. EC130B4/T2 and some AS350B3e have dual hyd as well. If this would be the problem for IFR certification, then all SE helicopters would be equipped with dual Hyd. Airbus helicopters as well as bell and marenco are interested in certifying SE IFR machines.
This should be the future.
The only problem could be the glide ratio 4:1 for helicopters compared to 12:1 of an airplane like pilatus or tbm. But at the same time, if we think of an airplane engine failure at low altitude then I do not understand. At 25000 feet okay you still can glide for 30 min. What about the take off or landing phases?
Last edited by helops; 27th Dec 2018 at 14:07.