N-4300F Archangel

The N-4300 Freighter (N-4300F) is an super sonic long-haul all-cargo version of the N-4300 Archangel [link] .

It amalgamates features from the N-4300 variant, using it's airframe and engines, combined with the latter's fuel capacity and high speed cruising capability.
With a maximum payload of 226,000 lb (103,000 kg), the freighter has a range of 4,885 nautical miles (9,047 km) at maximum payload, although greater range is possible if less cargo weight is carried.

The aircraft promises improved operating economics and new experience of delivery timing in super sonic speed compared to existing freighters.

As well as new-build freighters, Sentry Aerospace Industries has proposed passenger-to-freighter conversions of existing N-4300-350 airliners [link]

SCD stands for Side Cargo Door, a large cargo door used for accommodate larger cargo pallets and containers.