Description
A much bigger, and even more funkily-shaped version of the efficient D-Block upper stage, adding lots of tankage for maximum delta-v.
This stage, in slightly-modified form, forms the rather-overpowered upper stage of the Koyuz MK-1.
A stock subassembly called Mega D-Block. Built with 23 of the finest parts, its root part is Size1p5.Size0.Adapter.01.
Built in KSP version 1.10.1.
Smaller members of the series: