LAPCAT
Concept for a suborbital plane
LAPCAT (Long-Term Advanced Propulsion Concepts and Technologies) was a 36-month European FP6 study to examine ways to produce engines for a Mach number 4-8 hypersonic flight aircraft. The project ended in April 2008. It was funded by the European Commission research and development fund (rather than ESA), and cost 7 million euros.
LAPCAT II, a 10 million euro, four-year, follow on project, started in October 2008. The study aims to refine some of the results of the first study "allowing the definition of a detailed development roadmap" of a Mach five vehicle.
Objectives
Two major technologies were to be considered:
ram-compression, which needs an additional propulsion system to achieve its minimum working speed.
active compression, which has an upper Mach number limitation but can accelerate a vehicle up to its cruise speed.
Key objectives were the definition and evaluation of:
different propulsion cycles and concepts for high-speed flight at Mach 4 to 8 such as turbine-based and rocket-based combined cycles
critical technologies for:
integrated engine/aircraft performance
mass-efficient turbines and heat-exchangers
high-pressure and supersonic combustion experiments
modelling
Intended results were:
definition of requirements and operational conditions for high-speed flight at system level
dedicated experimental data-base specific to high-speed aerodynamics for supersonic and high-pressure combustion and flow phenomena.
setting-up and validating physical models supported by numerical simulation tools to address supersonic and high-pressure combustion, turbulence and transition phenomena.
feasibility study of weight performance turbine and heat exchanger components
Results
Among the several vehicles studied, only two novel concepts were retained for LAPCAT II: a Mach five vehicle and a Mach eight vehicle.
The public source identifies “LAPCAT” as concept for a suborbital plane. This brief keeps that definition visible, then builds a research path around LAPCAT, Concept and suborbital.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Apr 21, 2026. The linked authority identifier is Q1689336. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2008.
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This entry incorporates text from “LAPCAT” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.