Embraer C-390 Millennium (ex-KC-390)

[TomcatViP]

Cheaper MRO (new maintenance chain and twin Turbofans)
Fast and High alt cruise
More comfortable ride (a factor in long range deployment such as Europe to Pacific)
Increase rotation number (see point above)
Same infrastructure as C-130 (cabin volume )

What it does not offer:
Ubiquity (see all mission that the C-130 mastered over the years)
Unprepared runway operations
A network of subcontractor knowingly able to adapt anything on it.
4 engines to generate power for subsystems.

IMOHO, the C-390 is more a C-295 competing partner that also offers C-130 size cargo operations.

 

[Scott Kenny]

Just asking a dumbarse question - what advantages does it bring, compared to the all-ubiquitous C-130J ? I mean, everybody and his dog seems pleased with the C-130 since 60 years or more...

Faster, longer range, a little more cargo capacity.

 

[BlackBat242]

The C-390 cargo bay is a little wider and taller than the C-130's, and is sized between the C-130H/J and C-130H-30/J-30 in length.

Its payload capacity is 30% greater than either C-130 variant.

KC-390: Length 12.68 m X width 3.45 m X height 2.9 m (3.2 m aft of wing) + 5.82 m length on ramp
Payload: 26,000 kg

C-130H/J: Length 12.31 m X width 3.12 m X height 2.74 m + 3.12 m length on ramp
Payload: 20,000 kg

C-130H-30/J-30: Length 16.9 m X width 3.12 m X height 2.74 m + 3.12 m length on ramp
Payload: 20,000 kg