But high speed comes with its own challenges.
Such a weapon can be difficult to design and will need to be finely tuned, with little room to make changes, say experts.
Most supersonic cruise missiles are either anti-ship types with a limited land-attack capability such as the Indian/Russian BrahMos,
or more specialized weapons such as France’s nuclear-roled ASMP-A—which Paris plans to replace with an even faster,
possibly scramjet-powered weapon called the ASN4G, in the 2030s.

Experts believe there is a role for both high-speed and subsonic weapons.

The subsonic missile, on the other hand, is more of a “bomb truck,” says the missile industry expert.
With their big boxy airframes, such weapons “are quite resilient to changing things inside, so it supports a flexible future.

“For high speed, we [industry] are still grappling with developing technologies for propulsion and . . . for controlling the airframe. . . . There’s still a lot of technology growth to take place.”

＞scramjet-powered weapon called the ASN4G, in the 2030s.
ようわからんけども滑空弾はこれに相当するんですか？ ASN4G相当のエンジン