The integrated powerhead demonstrator (IPD) was a U.S. Air Force project in the 1990s and early 2000s run by NASA and the Air Force Research Laboratory (AFRL) to develop a new rocket engine front-end ("powerhead", sometimes also termed a powerpack) that would utilize a full flow staged combustion cycle (FFSC).
[1] The long-term design goal was to apply the advantages of FFSC to create a reusable engine with improved life, reliability and performance.
[3] According to NASA, the Integrated Powerhead Demonstrator project was the first of three potential phases of the Integrated High Payoff Rocket Propulsion Technology Program, which was aimed at demonstrating technologies that double the capability of state-of-the-art cryogenic booster engines.
The project's goal in 2005 was to develop a full-flow, hydrogen-fueled, staged combustion rocket engine.
[4] In 2007, Northrop Grumman announced it had received an AFRL contract to design and test a turbopump for liquid hydrogen propellants that could be used for these engines.