regeneratively

The SSME has a regeneratively cooled nozzle, which would protect the outer surfaces as well as the inner.

Shuttle Shutdown Coming - NASA Watch 2009

What will have to happen is, either they will revert to SSME (i.e., go back to Ares V "Classic" after all) or spend money developing a regeneratively cooled RS-68.

Today's Video - Profiling the Ares Launch Vehicle - NASA Watch 2009

The RS-68 does NOT have a regeneratively cooled diverging nozzle extension, and is protected from the hot exhaust gases on the INSIDE by ablative material.

Shuttle Shutdown Coming - NASA Watch 2009

Both engines are regeneratively cooled, pump fed, LOX-hydrocarbon.

XCOR Fires Lynx Engine - NASA Watch 2008

But on Flight 3, with the regeneratively cooled engine, there was some residual thrust after engine shut down and this caused the first stage to be pushed back toward the second stage after separation and there was a recontact between the stages.

NASA Watch: Keith Cowing: August 2008 Archives 2008

That is, we cannot blow any limits doing this - our build out will almost certainly have to be gradual, and probably comparatively slow until the total density of renewables is great enough to power regeneratively.

Energy Bulletin - 2010

The Falcon-1 failed, on at least one of its test flights, because fuel left in its regeneratively cooled engine continued to give a small thrust that sent the first stage careening into the second and broke the second stage engine.

ArmsControlWonk 2009

Based on the Merlin 1C engine that boosted the SpaceX Falcon 1 rocket to orbit in 2008, the Merlin Vacuum engine uses a regeneratively cooled combustion chamber.

SpaceRef Top Stories 2009

The anticipated performance is made possible by coupling the regeneratively-cooled TR408 RCE with a high area ratio nozzle.

News 2008

Key advances include an integrated igniter, an electroformed close-out of the regeneratively-cooled chamber, and a large area ratio nozzle.

News 2008