Expansion deflection nozzle

The exhaust gas flows past this in a more outward direction than in standard bell nozzles while expanding before being turned toward the exit.

[5][page needed] The smaller E-D nozzle developed 9,900 lbf (44 kN) and was also used to test the altitude compensation ability.

[5][page needed] The Chemical Automatics Design Bureau E-D nozzle was fully cooled and used for hot-fire tests in 1998.

Wickman Spacecraft & Propulsion Company have developed and static-tested a solid motor in conjunction with an E-D.[6] The University of Bristol, UK, has recently[when?]

A study suggests it could add an additional 180 kg (400 lb) to the payload of an Ariane 5 over the new Vinci engine provided it is also an expander cycle.

Employment on a single-stage-to-orbit (SSTO) rocket would use an E-D nozzle's altitude compensating abilities fully, allowing for a substantial increase in payload.