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They're all going to be external compression only, to avoid unstarts (hard enough for the SR-71 in cruise, let alone a maneuvering fighter).As flatric says, the NSI and MCID are normal shock ("pitot") inlets. All the supersonic compression is done by a single, strong normal shock at the intake aperture. On the other hand, in the F-16/79 the splitter plate was designed to act as a fixed compression ramp (6° initial wedge angle, followed by an isentropic compression surface turning the flow to 12.7°). There does not actually seem to be a convergent duct section (supersonic internal compression) at all. The terminal normal shock (much weaker due to the previous compression/deceleration) is not swallowed into the intake but remains at the opening.
They're all going to be external compression only, to avoid unstarts (hard enough for the SR-71 in cruise, let alone a maneuvering fighter).
As flatric says, the NSI and MCID are normal shock ("pitot") inlets. All the supersonic compression is done by a single, strong normal shock at the intake aperture. On the other hand, in the F-16/79 the splitter plate was designed to act as a fixed compression ramp (6° initial wedge angle, followed by an isentropic compression surface turning the flow to 12.7°). There does not actually seem to be a convergent duct section (supersonic internal compression) at all. The terminal normal shock (much weaker due to the previous compression/deceleration) is not swallowed into the intake but remains at the opening.
