TR-107
Proposed US kerolox rocket engine
title: "TR-107" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rocket-engines-using-kerosene-propellant", "rocket-engines-using-the-staged-combustion-cycle"] description: "Proposed US kerolox rocket engine" topic_path: "general/rocket-engines-using-kerosene-propellant" source: "https://en.wikipedia.org/wiki/TR-107" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Proposed US kerolox rocket engine ::
::data[format=table title="infobox rocket engine"]
| Field | Value |
|---|---|
| name | TR-107 |
| image | TR107 Prototype Engine.png |
| country_of_origin | United States |
| manufacturer | Northrop Grumman |
| purpose | low cost throttleable booster engine |
| type | liquid |
| fuel | RP-1 (kerosene) |
| oxidiser | LOX |
| thrust(SL) | 4900 kN |
| chamber_pressure | 177 bar |
| dry_weight | 00 kg |
| :: |
| name = TR-107 | image = TR107 Prototype Engine.png | country_of_origin = United States | manufacturer = Northrop Grumman | purpose = low cost throttleable booster engine | type = liquid | fuel = RP-1 (kerosene) | oxidiser = LOX | thrust(SL) = 4900 kN | thrust(Vac) = | specific_impulse_vacuum = | specific_impulse_sea_level = | chamber_pressure = 177 bar | thrust_to_weight = | cycle = | diameter = | height = | dry_weight = 00 kg The TR-107 was a developmental rocket engine designed in 2002 by Northrop Grumman for the NASA and DoD-funded Space Launch Initiative (SLI). Operating on LOX/RP-1, the engine was throttleable and had a thrust of 4900 kN at a chamber pressure of 177 bar, making it one of the most powerful engines ever constructed.
History
The TR-107 was developed by TRW following the successful conclusion of the development program for the TR-106 engine, a similar throttleable engine of about half the thrust burning LOX/LH2 instead of LOX / RP-1. Tom Mueller, then VP of Propulsion Development at Northrop, was project manager for both the TR-106 and TR-107 engines.
In 2002, Mueller co-founded SpaceX with Elon Musk and became the VP of propulsion after cancellation of the SLI program.
Status
Northrop Grumman development of the TR-107 engine permitted consideration for potential use on next-generation launch and space transportation systems.
, no flight models are known to exist.
References
References
- (May 5, 2003). "Northrop Grumman Awarded NASA Contract for Next Generation Launch Technology". Primezone.
- "TR-107". Astronautix.com.
- "Tom Mueller Bio". SpaceX.
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::