SU-53 an experimental aircraft from some alternative path in history. I sometimes like to imagine what history would look like if tiny alterations in the order of what science was discovered and what technology was created.
The development of the Grettin-Heinner Pulse Drive was a major breakthrough for the Relegdron Territories. Here is a depiction of the SU-53, the first production plane to use the GHP Drive as the sole form of propulsion. Before 2271-TS, planes such as the SU-48series, would support the centrally-placed GHP Drive with out-rigged geeshan turbines.
The XSU-52-90 was the first prototype of what would become the SU-53, that survived it’s initial and subsequent trials.