Hypersonic Shock-Induced Combustion Propulsion
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
An investigation of the shock-induced-combustion ramjet propulsive cycle was conducted in the 38-mm-bore ram accelerator facility at the University of Washington. Titanium-alloy projectiles were launched into reactive propellants at Mach numbers greater than 5.5 to determine if the combustion process could be shock initiated and stabilized, what levels of thrust can be generated, and what the reactivity of the projectile material is in hypersonic flow. Experiments were carried out in methane- and ethane-based propellants with and without carbon dioxide diluent. Positive acceleration was observed in CH4/O2/CO2 and C2H6/O2 propellants in the Mach range of 5.5-7 (1.7-2.1 km/s) for distances of up to 6 meters. In the majority of cases, the acceleration process was terminated by either unstart, cruise at constant velocity (i.e., thrust equal drag), or wave fall-off. Sustained accelerations greater than 9000 g and average specific thrust 150 N-s/kg were achieved in these experiments.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.003 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it