Development of a gaseous detonation driven hyper-velocity launcher
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
The concept of using gaseous detonation waves to generate high-pressure propellant for a single-stage gas gun is investigated theoretically and experimentally. The advantage of this approach (in contrast to conventional light gas guns) is that the resulting launcher is inexpensive to construct and simple to operate, yet is capable of achieving velocities in excess of 3 km/s. Theoretical internal ballistics methods have been developed for the optimization of gas gun systems. A prototype detonation driven gas gun system has been developed. Performance of the gun system is optimized by formulating the detonable mixture to use as propellant, with fuel rich hydrogen/oxygen or helium-diluted hydrogen/oxygen appearing the most promising. All the parameters of the launcher design are explored using a quasi-one-dimensional Euler code to model the internal ballistics. Experimental implementation of the concept is performed with a 1.27-cm-inner-diameter (ID), 1.83-m barrel driven by the detonable gas mixture contained in a 1-m-long, 3.2-cm-ID driver. Velocities of 2.7~km/s are demonstrated with 2.5-g projectiles.
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 | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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